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Oxidation mechanism of high-volume fraction SiCp/Al composite under laser irradiation and subsequent machining
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作者 Hanliang Liu Guolong Zhao +5 位作者 Zhiwen Nian Zhipeng Huang Kai Yang Conghua Liu Peng Wang Zhenkuan Diao 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2023年第3期34-47,共14页
Conventional mechanical machining of a composite material comprising an aluminum matrix reinforced with a high volume fraction of SiC particles(hereinafter referred to as an SiCp/Al composite)faces problems such as ra... Conventional mechanical machining of a composite material comprising an aluminum matrix reinforced with a high volume fraction of SiC particles(hereinafter referred to as an SiCp/Al composite)faces problems such as rapid tool wear,high specific cutting force,and poor surface integrity.Instead,a promising method for solving these problems is laser-induced oxidation-assisted milling(LOAM):under laser irradiation,the local workpiece material reacts with oxygen,thus forming loose and porous oxides that are easily removed.In the present work,the oxidation mechanism of SiCp/Al irradiated by a nanosecond pulsed laser is studied to better understand the laser-induced oxidation behavior and control the characteristics of the oxides,with laser irradiation experiments performed on a 65%SiCp/Al composite with various laser parameters and auxiliary gases(oxygen,nitrogen,and argon).With increasing laser pulse energy density,both the ablated groove depth and the width of the heat-affected zone increase.When oxygen is used as the auxiliary gas,an oxide layer composed of SiO_(2)and Al2O3 forms,and CO_(2)is produced and escapes from the material,thereby forming pores in the oxides.However,when nitrogen or argon is used as the auxiliary gas,a recast layer is produced that is relatively difficult to remove.Under laser irradiation,the sputtered material reacts with oxygen to form oxides on both sides of the ablated groove,and as the laser scanning path advances,the produced oxides accumulate to form an oxide layer.LOAM and conventional milling are compared using the same milling parameters,and LOAM is found to be better for reduced milling force and tool wear and improved machined surface quality. 展开更多
关键词 sicp/Al composite Oxidation mechanism Nanosecond pulsed laser Laser-induced oxidation Heat-affected zone
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Microstructure characteristics and thermodynamic properties of A357-SiCp/A357 layered composites prepared by semi-solid vacuum stirring suction casting
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作者 Zhen-lin Zhang Ying Xiao +3 位作者 Jun Xu Feng-liang Tan Li Wang Min He 《China Foundry》 SCIE CAS CSCD 2023年第2期108-114,共7页
A357-SiCp/A357 layered composites were prepared using a semi-solid vacuum stirring suction casting method.The microstructures,mechanical properties,and thermal conductivities of the composites fabricated under differe... A357-SiCp/A357 layered composites were prepared using a semi-solid vacuum stirring suction casting method.The microstructures,mechanical properties,and thermal conductivities of the composites fabricated under different suction casting processes were compared.Additionally,the microstructural evolution characteristics and performance enhancement mechanism of the A357-SiCp/A357 layered composites were discussed.The results demonstrate that suction casting at 610°C with a low solid phase ratio can significantly enhance the material density and reduce the agglomeration of SiCp.The A357-SiC_(p)/A357 interface is clear and straight with good bonding.With an increase in the suction casting temperature,the bending resistance and thermal conductivity of the A357-SiC_(p)/A357 layered composites exhibit a trend of significantly increase at first and then slowly decrease owing to casting defects,interface bonding,and SiCp distribution.Compared with SiCp/A357 composites,the bending strength,deflection,and thermal conductivity of the A357-SiCp/A357 layered composites increase from 257 MPa,1.07 mm,and 155.72 W·(m·K)^(-1) to 298 MPa,2.1 mm,and 169.86 W·(m·K)^(-1),respectively.This study provides a reference for improving the rheological casting of aluminum matrix layered composites. 展开更多
关键词 SEMI-SOLID vacuum stirring suction casting sicp/A357 layered composites thermodynamic properties rheological casting
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超声振动辅助切削SiCp/Al复合材料的加工机理及试验
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作者 林洁琼 吴明磊 +3 位作者 刘思洋 周岩 谷岩 周晓勤 《中国表面工程》 EI CAS CSCD 北大核心 2024年第2期182-198,共17页
切削加工过程中材料损伤形式对加工表面质量会产生较大影响,现有仿真分析难以模拟真实颗粒失效行为,通过建立二维微观多相有限元模型能够深入了解材料损伤与表面质量的关系。基于常规切削(Conventional cutting,CC)与超声振动辅助切削(U... 切削加工过程中材料损伤形式对加工表面质量会产生较大影响,现有仿真分析难以模拟真实颗粒失效行为,通过建立二维微观多相有限元模型能够深入了解材料损伤与表面质量的关系。基于常规切削(Conventional cutting,CC)与超声振动辅助切削(Ultrasonic vibration-assisted cutting,UVAC)两种加工方式,通过有限元仿真软件Abaqus对20%SiCp/Al复合材料的切削过程进行仿真模拟,阐释加工过程中刀具与工件的相互作用机理,并在同一参数下验证有限元仿真的准确性。通过设计单因素试验,对比两种加工方式及不同加工参数对切削力和表面粗糙度的影响规律,得出最佳加工参数组合,并对最佳加工参数下表面形貌进行分析。模拟和试验结果表明,SiC颗粒断裂、颗粒耕犁、颗粒拔出以及Al基体撕裂是影响SiCp/Al复合材料加工质量的主要原因,刀具与颗粒不同的相对作用位置会产生不同的损伤形式。与常规切削相比,施加超声振动后可以有效抑制颗粒失效和基体损伤,使加工中的平均切削力(主切削力)降低33%,工件已加工表面粗糙度值最大减小量为531 nm,显著提高了表面质量。所建立的二维微观多相有限元模型,能够有效模拟铝基复合材料的加工缺陷和裂纹损伤问题,对提高难加工材料的高质量表面制备有重要借鉴意义。 展开更多
关键词 超声振动辅助切削 sicp/AL复合材料 加工机理 表面质量 切削力
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SiCp/Al复合材料纳米压痕/划痕下的脆塑性行为研究
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作者 刘亚梅 王佳力 +2 位作者 谷岩 吴爽 李震 《金刚石与磨料磨具工程》 CAS 北大核心 2024年第5期607-620,共14页
为探究SiCp/Al复合材料中两相材料相互作用引起的力学性能差异,研究微观尺度下法向载荷变化对SiCp/Al复合材料形变和去除的影响。采用纳米压痕实验,基于Oliver-Pharr法测得其硬度和弹性模量,并对其压痕表面进行观察,结合有限元仿真分析... 为探究SiCp/Al复合材料中两相材料相互作用引起的力学性能差异,研究微观尺度下法向载荷变化对SiCp/Al复合材料形变和去除的影响。采用纳米压痕实验,基于Oliver-Pharr法测得其硬度和弹性模量,并对其压痕表面进行观察,结合有限元仿真分析产生力学性能差异的原因;同时,根据纳米压痕实验所得力学参数进行变载荷纳米划痕仿真,并配合实验后划痕表面观察结果分析材料的形变和脆塑性行为。结果表明:当金刚石压头作用于SiC颗粒时,颗粒出现破碎和二次压入现象,所测硬度与弹性模量小于单晶SiC的理论值;当金刚石压头作用于基体相时,由于SiC颗粒阻碍基体压入,复合材料的硬度与弹性模量测量结果偏大。在纳米划痕过程中,复合材料的去除形式随载荷变化体现为划擦、耕犁和切削阶段,其中的基体相通过塑性流动产生塑性脊堆积并伴随有涂覆现象,SiC颗粒则以脱黏、断裂破碎和拔出等脆性机制而去除,且SiC颗粒的二次压入、断裂、破碎和拔出是导致复合材料力学性能与单晶SiC的力学性能产生巨大差异的主要原因。随着划痕载荷增加,SiC体积分数为45%的SiCp/Al复合材料的去除机制更多取决于以塑性去除为主的基体相,而SiC颗粒则主要表现为脆性去除。 展开更多
关键词 纳米压痕/划痕 sicp/AL复合材料 有限元仿真 力学性能 去除机制
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纵扭超声辅助铣削SiCp/Al复合材料表面质量研究
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作者 张明军 陈烁 +5 位作者 王鑫波 杨江涛 刘河龙 吕耀威 李德辉 于明博 《河南理工大学学报(自然科学版)》 CAS 北大核心 2024年第5期96-107,共12页
高体积分数SiCp/Al复合材料具有高比强度、高比模数和良好的耐磨性等优异性能。然而,它们的高硬度和脆性会导致精密制造过程中应力分布更为复杂,这会使材料中产生过大的力和过多的热,从而影响加工精度和工件耐久极限寿命。目的通过分析... 高体积分数SiCp/Al复合材料具有高比强度、高比模数和良好的耐磨性等优异性能。然而,它们的高硬度和脆性会导致精密制造过程中应力分布更为复杂,这会使材料中产生过大的力和过多的热,从而影响加工精度和工件耐久极限寿命。目的通过分析切削过程中颗粒的去除机理和表面缺陷类型,利用纵扭超声辅助铣削(longitudinal-torsional ultrasonic assisted milling,LTUAM)技术,改善高体积分数SiCp/Al复合材料的加工表面质量。方法利用ABAQUS和PYTHON软件,建立考虑颗粒断裂过程的两相随机分布颗粒SiCp/Al复合材料模型,并采用Johnson-Cook模型和Brittle Cracking模型对SiCp/Al复合材料纵扭超声辅助铣削过程进行有限元模拟仿真。针对不同加工参数,进行SiCp/Al复合材料纵扭超声辅助铣削和常规铣削(conventional milling,CM)试验,评估有限元仿真模拟与试验结果的一致性。结果模拟结果表明,损伤和裂纹主要产生在SiC颗粒(SiCp)中上部的切削线上,凹坑缺陷主要产生在颗粒下部的切削线上。试验结果显示,表面缺陷的类型主要包括颗粒的损伤和拔出、颗粒的损伤和断裂形成凹坑、未损伤的颗粒形成凸起、破损颗粒与刀具在已加工表面上挤压摩擦形成犁沟、铝基体涂覆、表面微裂纹和表面空穴等,并且当加工速度120 m/min,超声振幅3μm时,最大裂纹深度最小,表面缺陷最小,表面质量最好。结论对比有限元仿真结果与试验结果发现,二者的表面质量变化趋势基本具有一致性。纵扭超声辅助铣削技术的应用对提高SiCp/Al复合材料的表面质量有较好效果。 展开更多
关键词 sicp/AL复合材料 有限元仿真 超声加工 表面质量 硬脆材料
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Particle Removal Mechanism of High Volume Fraction SiCp/Al Composites by Single Diamond Grit Tool 被引量:6
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作者 都金光 MING Wuyi +3 位作者 CAO Yang MA Jun 何文斌 LI Xiaoke 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第2期324-331,共8页
Particle removal mechanism was presented during machining particle SiC/Al composites with diamond grinding tool. The relevant removal modes and their mechanisms were discussed considering the impact and squeezing effe... Particle removal mechanism was presented during machining particle SiC/Al composites with diamond grinding tool. The relevant removal modes and their mechanisms were discussed considering the impact and squeezing effect of diamond grit on the SiC particle. The experimental results show that the aluminum matrix has larger plastic deformation, so the aluminum mixed with the surplus SiC particles is cut from the surface. The SiC particles can be removed in multiple ways, such as broken/fractured, micro cracks, shearing and pulled out, etc. More particles removed by shearing, and less particles removed by fractured during material removal progress can produce a better machined surface. 展开更多
关键词 sicp/AL composites SiC particle removal MECHANISM GRINDING TOOL
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Optimization of Machining Characteristics for Al/SiCp Composites using ANN/GA 被引量:5
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作者 R.Karthikeyan B.C.Pai 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2002年第1期47-50,共4页
The present work is focused on optimization of machining characteristics of AI/SiCp composites. The machining characteristics such as specific energy, tool wear and surface roughness were studied. The parameters such ... The present work is focused on optimization of machining characteristics of AI/SiCp composites. The machining characteristics such as specific energy, tool wear and surface roughness were studied. The parameters such as volume fraction of SiC, cutting speed and feed rate were considered. Artificial neural networks (ANN) was used to train and simulate the experimental data. Genetic algorithms (GA) was interfaced with ANN to optimize the machining conditions for the desired machining characteristics. Validation of optimized results was also performed by confirmation experiments. 展开更多
关键词 Al/sicp composites Artificial neural networks Genetic algorithms
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Near-net shaped Al/SiCP composites via vacuum-pressure infiltration combined with gelcasting 被引量:8
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作者 Cui-ge DONG Ri-chu WANG +3 位作者 Yi-xin CHEN Xiao-feng WANG Chao-qun PENG Jing ZENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第6期1452-1462,共11页
To solve the problem of difficult machining, the near-net shaped Al/SiCP composites with high volume fraction of SiC particles were fabricated by vacuum-pressure infiltration. The SiCP preform with a complex shape was... To solve the problem of difficult machining, the near-net shaped Al/SiCP composites with high volume fraction of SiC particles were fabricated by vacuum-pressure infiltration. The SiCP preform with a complex shape was prepared by gelcasting. Pure Al, Al4Mg, and Al4Mg2Si were used as the matrices, respectively. The results indicate that the optimal parameters of SiCP suspension in gelcasting process are pH value of 10, TMAH content of 0.5 wt.%, and solid loading of 52 vol.%. The Al matrix alloyed with Mg contributes to improving the interfacial wettability of the matrix and SiC particles, which increases the relative density of the composite. The Al matrix alloyed with Si is beneficial to inhibiting the formation of the detrimental Al4C3 phases. The Al4Mg2Si/SiCP composite exhibits high relative density of 99.2%, good thermal conductivity of 150 W·m^-1·K^-1, low coefficient of thermal expansion of 10.1×10^-6 K^-1, and excellent bending strength of 489 MPa. 展开更多
关键词 Al/sicp composites GELCASTING vacuum-pressure infiltration microstructure properties
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Preparation and characterization of different surface modified SiCp reinforced Al-matrix composites 被引量:10
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作者 LÜ Pin-hui WANG Xiao-feng +2 位作者 DONG Cui-ge PENG Chao-qun WANG Ri-chu 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第9期2567-2577,共11页
The effects of SiCp surface modifications(Cu coating,Ni coating and Ni/Cu coating)on the microstructures and mechanical properties of Al matrix composites were investigated.Surface modification of SiC particles with C... The effects of SiCp surface modifications(Cu coating,Ni coating and Ni/Cu coating)on the microstructures and mechanical properties of Al matrix composites were investigated.Surface modification of SiC particles with Cu,Ni and Cu/Ni,respectively,was carried out by electroless plating method.SiCp/Al composites were prepared by hot pressed sintering followed by hot extrusion.The results show that the surface modification of SiC particles plays an effective role,which is relative to the type of surface coating,and the interfacial bonding become stronger in the following order:untreated SiCp<Ni(Cu)-coated SiCp<Ni/Cu-coated SiCp.The Ni/Cu-coated SiCp/Al composites exhibit the best comprehensive mechanical properties,with ultimate tensile strength(σUTS)and fracture strain(εf)of 389 MPa and 6.3%,respectively.Compared with that of untreated-SiCp/Al composites,theσUTS andεf are enhanced by 19.3%and 57.5%. 展开更多
关键词 sicp/Al composite surface modification electroless plating mechanical properties interfacial bonding
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Effect of a Slight Interfacial Reaction on Mechanical Properties of SiCp/Al Composites 被引量:3
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作者 崔岩 《High Technology Letters》 EI CAS 1997年第1期96-100,共5页
A slight interfacial reaction in squeeze-cast SiCp/6061AI composites has been studied. It is found that this kind of reaction has a particular effect on the mechanical properties of the composites. The results of fie-... A slight interfacial reaction in squeeze-cast SiCp/6061AI composites has been studied. It is found that this kind of reaction has a particular effect on the mechanical properties of the composites. The results of fie-cure tests show that this reaction in the composites obviously increases the elastic properties, but is not beneficial to the fracture strength and ductility.This phenomenon can be interpreted in terms of two different micromechanisms which have been analyzed using TEM and HREM observations, acoustic emission (AE) technique and SEM fractography. In addition, a new method of SiC surface modification which can control the interface state is initially presented. 展开更多
关键词 sicp/AL composite Slight INTERFACIAL REACTION MECHANICAL behaviour Keying in CRACK INITIATION
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SiCp/Al-Si基复合材料界面结构调控及强化机制的研究进展
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作者 苏嶓 王爱琴 +4 位作者 谢敬佩 刘瑛 张津浩 柳培 梁婷婷 《材料热处理学报》 CAS CSCD 北大核心 2024年第2期1-12,共12页
SiCp/Al-Si基复合材料具有高的比强度、比刚度、比模量,良好的导热、导电、耐磨性及尺寸稳定性等优点,作为结构功能性材料应用于空间工程、电子封装、交通运输和精密仪器等领域。其研究热点主要集中在界面结构调控、强化机制及性能调控... SiCp/Al-Si基复合材料具有高的比强度、比刚度、比模量,良好的导热、导电、耐磨性及尺寸稳定性等优点,作为结构功能性材料应用于空间工程、电子封装、交通运输和精密仪器等领域。其研究热点主要集中在界面结构调控、强化机制及性能调控等方面。在SiCp/Al-Si复合材料中存在着增强体与基体界面、析出相与基体界面、析出相与增强体界面,这些界面受各种因素影响,会出现多种界面反应和界面产物,界面结构和结合状态复杂而多样。基于此,本文综述了制备工艺、基体合金成分和SiCp表面改性等方面对SiCp/Al-Si基复合材料界面结构的影响及调控,并总结了影响其力学性能的因素及强化机制的研究现状,最后对复合材料未来的发展及研究方向进行了展望。 展开更多
关键词 sicp/Al-Si复合材料 界面结构调控 力学性能 强化机制 多尺度研究
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Corrosion Behavior of Alumina Reinforced Aluminium (6063) Metal Matrix Composites 被引量:3
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作者 K. K. Alaneme M. O. Bodunrin 《Journal of Minerals and Materials Characterization and Engineering》 2011年第12期1153-1165,共13页
The influence of alumina volume percent and solution heat-treatment on the corrosion behaviour of Al (6063) composites and its monolithic alloy in salt water, basic and acidic environments is investigated. Al (6063) ... The influence of alumina volume percent and solution heat-treatment on the corrosion behaviour of Al (6063) composites and its monolithic alloy in salt water, basic and acidic environments is investigated. Al (6063) – Al2O3 particulate composites containing 6, 9, 15, and 18 volume percent alumina were produced by adopting two step stir casting. Mass loss and corrosion rate measurements were utilized as criteria for evaluating the corrosion behaviour of the composites. It is observed that Al (6063) – Al2O3 composites exhibited excellent corrosion resistance in NaCl medium than in the NaOH and H2SO4 media. The unreinforced alloy exhibited slightly superior corrosion resistance than the composites in NaCl and NaOH media but the composites had better corrosion resistance in H2SO4 medium. Furthermore, solution heat-treatment resulted in improved corrosion resistance for both the composites and the unreinforced alloy while the effect of volume percent alumina on corrosion resistance did not follow a consistent trend. 展开更多
关键词 STIR CASTING Al (6063) AL2O3 composite solution heat-treatment Corrosion rate mass LOSS
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Effect of Na3AlF6 Addition and Surface Modification of SiCp on the Microstructure and Mechanical Properties of SiCp/Al Composites 被引量:2
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作者 WANG Hao YANG Xiaojian +1 位作者 XU Jianhang LIU Lianglan 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第3期534-540,共7页
Al-matrix composites reinforced with 56.5 vol% SiC were prepared by powder metallurgy with different amounts of additives and surface modifications of SiCp. The crystalline phase, morphology, elements on the surface o... Al-matrix composites reinforced with 56.5 vol% SiC were prepared by powder metallurgy with different amounts of additives and surface modifications of SiCp. The crystalline phase, morphology, elements on the surface of SiCp and the interface between SiCp and Al were characterized by XRD, SEM, EDS and EPMA. The results show that it is favorable for the reaction between TiO2-C on the surface of SiCp and Al at the SiCp-Al interface at 1 050 ℃. Besides, the process of Na3 AlF6 melting, dissolving and then contacting with Al2 O3 formed the NaF-AlF3-Al2 O3 system, which generated OAlF2-, promoting the dessolution of Al2 O3 film on the surface of Al powder. Na3 AlF6 meets the needs of chemical reaction in TiO2-C-Al system at the SiCpAl interface in the way of offering more molten Al. After 0.75 wt% Na3 AlF6 was added into raw materials, the whole TiO2-C film and most SiO2 film were destroyed and the interfacial bonding between SiCp and Al was keeping good, in which no obvious void and crack were observed. Meanwhile, no brittle Al4 C3 phase formed in the system. At this time, the flexure strength and density of samples presented optimal values, reaching up to 106.5 MPa and 90.77% respectively. 展开更多
关键词 sicp/AL composites powder METALLURGY ADDITIVES surface modification
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Study on fracture behavior of SiCp/A356 composites 被引量:1
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作者 KANG Suk-Bong 《Rare Metals》 SCIE EI CAS CSCD 2006年第z2期168-173,共6页
The fracture behavior of SiCp/A356 composite at room and high temperatures was studied. Under tensile stress condition at room temperature, the fracture is mostly a combination of the brittle fracture of SiC particles... The fracture behavior of SiCp/A356 composite at room and high temperatures was studied. Under tensile stress condition at room temperature, the fracture is mostly a combination of the brittle fracture of SiC particles and ductile fracture of A356 matrix. As the tensile temperature increases, the composite changes the main fracture behavior to the separation fracture of the bonding surface between SiC particles and A356 matrix. When the tensile temperature reaches 573 K, the fracture behavior of the composites is almost the whole separation fracture of the bonding surface, which is the main strengthening mechanism at high temperature. Under the cycle stress condition at room and high temperatures, the main fracture behavior of the composites is always a combination of the brittle fracture of SiC particles and ductile fracture of A356 matrix. However, under the cycle stress at high temperature, cycle behavior of the composites changes from cycle hardening at room temperature to the cycle softening at high temperature. 展开更多
关键词 sicp/A356 composites brittle fracture ductile fracture separation fracture
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Experimental Study of Machinability in Millgrinding of SiCp/Al Composites 被引量:3
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作者 李建广 都金光 +2 位作者 YAO Yingxue HAO Zhaopeng LIU Xiao 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第6期1104-1110,共7页
An attempt was made to investigate the machinability of Si Cp/Al composites based on the experimental study using mill-grinding processing method. The experiments were carried out on a high-speed CNC machining center ... An attempt was made to investigate the machinability of Si Cp/Al composites based on the experimental study using mill-grinding processing method. The experiments were carried out on a high-speed CNC machining center using integrated abrasive cutting tool. The effects of combined machining parameters, e g, cutting speed(vs), feed rate(vf), and depth of cut(ap), with the same change of material removal rate(MRR) on the mill-grinding force and surface roughness(Ra) were investigated. The formation mechanism of typical machined surface defects was analyzed by SEM. The experimental results reveal that with the same change of material removal rate, lower mill-grinding force values can be gained by increasing depth of cut and feed rate simultaneously at higher cutting speed. With the same change of MRR value, lower surface roughness values can be gained by increasing the feed rate at higher cutting speed, rather than just increasing the depth of cut, or increasing the feed rate and depth of cut simultaneously. The machined surface of Si Cp/Al composites reveals typical defects which can influence surface integrity. 展开更多
关键词 sicp/Al composites mill-grinding machinability mill-grinding force surface roughness
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基于单颗磨粒磨削的SiCp/Al材料去除机理研究
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作者 范磊 王娜 尹国强 《组合机床与自动化加工技术》 北大核心 2024年第10期126-131,共6页
基于单颗磨粒磨削的仿真和实验,研究了SiCp/Al复合材料的去除机理,并对体积分数为20%和55%的SiCp/Al材料加工表面/亚表面质量进行对比研究。通过建立单磨粒磨削SiCp/Al材料的有限元仿真模型,对材料的去除过程进行仿真模拟,研究了不同磨... 基于单颗磨粒磨削的仿真和实验,研究了SiCp/Al复合材料的去除机理,并对体积分数为20%和55%的SiCp/Al材料加工表面/亚表面质量进行对比研究。通过建立单磨粒磨削SiCp/Al材料的有限元仿真模型,对材料的去除过程进行仿真模拟,研究了不同磨削深度对表面/亚表面质量的影响;通过单磨粒磨削实验验证了仿真结果的准确性,并深入研究体积分数分别为20%和55%的SiCp/Al材料的表面形貌,分析了Al基体与SiC颗粒的去除方式,此外,还研讨了SiC颗粒的塑性去除条件。最后,通过对磨屑形貌的分析,进一步研究了材料的去除机理。 展开更多
关键词 sicp/AL复合材料 单磨粒磨削 材料去除机理 有限元仿真 表面/亚表面质量
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Liquid-Phase-Impacting Diffusion Welding Mechanism and Microstructure of Welded Joint of Al Matrix Composite SiCp/101A 被引量:1
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作者 Jitai NIU Wei GUO Qingchang MENG Xinmei ZHANG Xingqiu LIU Guangtao ZHOU 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第z1期179-181,共3页
The liquid-phase-impacting (LPI) diffusion welding mechanism and microstructure of welded joint of aluminum matrixcomposite SiCp/101A have been studied. It shows that by LPl diffusion welding, the interface state betw... The liquid-phase-impacting (LPI) diffusion welding mechanism and microstructure of welded joint of aluminum matrixcomposite SiCp/101A have been studied. It shows that by LPl diffusion welding, the interface state between SiCparticle and matrix is prominent, the harmful microstructure or brittle phase can be restrained from the welded joint.Moreover, the density of dislocation in the matrix near the interface and in the matrix are all so higher than that ofparent composite, the dislocation entwists each other intensively resulted in welding the composite successfully. 展开更多
关键词 ALUMINUM MATRIX composite Liquid-phase-impacting DIFFUSION welding sicp/101A
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Effect of aging treatment on mechanical properties of (SiCw+SiCp)/2024Al hybrid nanocomposites 被引量:5
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作者 耿林 张雪囡 +2 位作者 王桂松 郑镇洙 徐彬 《中国有色金属学会会刊:英文版》 EI CSCD 2006年第2期387-391,共5页
2024Al based composites reinforced by a hybrid of SiC whisker and SiC nanoparticle were fabricated by a squeeze casting route. In the (SiCw+SiCp)/Al composites, the volume fraction of SiC whisker is 20% and that of Si... 2024Al based composites reinforced by a hybrid of SiC whisker and SiC nanoparticle were fabricated by a squeeze casting route. In the (SiCw+SiCp)/Al composites, the volume fraction of SiC whisker is 20% and that of SiC nanoparticle is 2%, 5% and 7%, respectively. The as cast composites were solution treated followed by aging treatment. The experimental results show that the SiC nanoparticles are more effective in improving the hardness and tensile strength of the composites than SiC whiskers. The hardening kinetics of the composites is enhanced by reinforcements addition and the peak aging time is 4-5 h. The hardness of all the hybrid composite decreases at the initial aging stage, suggesting that dislocation recovery softening process coexists with precipitation hardening. DSC study shows that the GP zone formation of the hybrid composites is suppressed. 展开更多
关键词 (SiCw+sicp)/2024Al SiCw/2024Al SiCo/2024Al 退火 机械性能 显微结构 纳米复合材料
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SiCp粒径级配对55%SiCp/6061Al复合材料组织和性能的影响
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作者 王梦奇 刘越 +1 位作者 肖春林 刘春明 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第6期802-807,共6页
采用真空热压法制备了55%SiCp/6061Al(55%为体积分数)复合材料,研究SiCp粒径级配对复合材料SiCp分布均匀度、致密度和抗弯强度的影响.研究结果表明:粒径级配复合材料组织致密、SiCp分布均匀且SiCp与6061Al合金基体界面结合强度高.双粒径... 采用真空热压法制备了55%SiCp/6061Al(55%为体积分数)复合材料,研究SiCp粒径级配对复合材料SiCp分布均匀度、致密度和抗弯强度的影响.研究结果表明:粒径级配复合材料组织致密、SiCp分布均匀且SiCp与6061Al合金基体界面结合强度高.双粒径(60+25)μm、质量比4∶1复合材料热处理后抗弯强度由395 MPa提高为548 MPa;三粒径级配为(120+60+25)μm、质量比为1∶1∶1的复合材料热处理前抗弯强度最高,为397 MPa;双粒径级配(106+25)μm、质量比4∶1的复合材料致密度>99.0%、均匀度>90.00%、热处理后抗弯强度>400MPa,具有优异的综合性能. 展开更多
关键词 55%sicp/6061Al复合材料 真空热压 粒径级配 均匀度 致密度 抗弯强度
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Investigation on Material Response of 55% SiCp/Al Composites Induced by Pulsed Laser 被引量:1
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作者 HU Maoshun ZHAO Guolong +3 位作者 LI Liang ZHANG Xiaohui ZHANG Kaihu ZHAO Wei 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第S01期49-57,共9页
Silicon carbide particle reinforced aluminum matrix composites(SiCp/Al composites)are widely used in aviation,aerospace and electronic package.However,low machining efficiency,severe tool wear and poor surface quality... Silicon carbide particle reinforced aluminum matrix composites(SiCp/Al composites)are widely used in aviation,aerospace and electronic package.However,low machining efficiency,severe tool wear and poor surface quality are severe during the machining of SiCp/Al composites.Laser-induced oxidation is capable to improve the machinability of SiCp/Al composites.The material response of 55%(volume fraction)SiCp/Al composites induced by a nanosecond pulsed laser is studied.A metamorphic layer which is composed of an oxide layer and sub-layer is produced.The effects of reaction surrounding and laser average power on the microstructure and thickness of the oxide layer and sub-layer are investigated.Experimental results show that:A thicker oxide layer and a sub-layer are formed in an oxygen-rich atmosphere.The oxides are mainly composed of 2Al2O3·SiO2(mullite).A positive correlation between the laser average power and thicknesses of oxide layers and sub-layers is found.A loose oxide layer of 138μm and a sub-layer of 21μm are formed at the laser average power of 6 W,laser scanning pitch of 10μm,and laser scanning speed of 1 mm/s under an oxygen-rich atmosphere.The high efficient machining of Si Cp/Al composites can be realized by laser-induced oxidation. 展开更多
关键词 MICROSTRUCTURE oxidation behavior sicp/Al composites ytterbium-doped pulsed fiber laser
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