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铝合金焊接材料制备研究现状与发展 被引量:19
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作者 路全彬 龙伟民 +2 位作者 钟素娟 高雅 张强 《焊接》 北大核心 2016年第2期6-9,69,共4页
铝合金焊接结构在轨道交通、航空航天、船舰等领域的广泛应用,对铝合金焊接技术的要求越来越高。铝合金焊接技术的提高,要求更高质量的焊接材料。铝合金焊接材料的制备技术,对于铝合金焊接材料质量的保证起着关键的作用。介绍了铝合金... 铝合金焊接结构在轨道交通、航空航天、船舰等领域的广泛应用,对铝合金焊接技术的要求越来越高。铝合金焊接技术的提高,要求更高质量的焊接材料。铝合金焊接材料的制备技术,对于铝合金焊接材料质量的保证起着关键的作用。介绍了铝合金钎焊和熔化焊用焊丝的制备技术及发展现状,探讨了各制备工艺的适用性及优缺点,为铝合金焊接材料的制备提供一定的技术参考。 展开更多
关键词 铝焊材料 氩弧焊 钎焊 挤压 连铸
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Development of Al-12Si-xTi system active ternary filler metals for Al metal matrix composites 被引量:5
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作者 张贵锋 苏伟 +1 位作者 张建勋 A.SUZUMURA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第3期596-603,共8页
To improve the wettability of Al metal matrix composites(Al-MMCs) by common filler metals,Al-12Si-xTi(x=0.1,0.5,1,3.0;mass fraction,%) system active ternary filler metals were prepared.It was demonstrated that alt... To improve the wettability of Al metal matrix composites(Al-MMCs) by common filler metals,Al-12Si-xTi(x=0.1,0.5,1,3.0;mass fraction,%) system active ternary filler metals were prepared.It was demonstrated that although the added Ti existed within Ti(Al1-xSix)3(0≤x≤0.15) phase,the shear strength and shear fracture surface of the developed Al-12Si-xTi brazes were quite similar to those of traditional Al-12Si braze due to the presence of similar microstructure of Al-Si eutectic microstructure with large volume fraction.So,small Ti addition(~1%) did not make the active brazes brittle and hard compared with the conventional Al-12Si braze.The measured melting range of each Al-12Si-xTi foil was very similar,i.e.,580-590 ℃,because the composition was close to that of eutectic.For wettability improvement,with increasing Ti content,the interfacial gap between the Al2O3 reinforcement and filler metal(R/M) could be eliminated,and the amount of the remainder of the active fillers on the composite substrate decreased after sessile drop test at 610 ℃ for 30 min.So,the wettability improvement became easy to observe repeatedly with increasing Ti content.Additionally,the amount and size of Ti(AlSi)3 phase were sensitive to the Ti content(before brazing) and Si content(after brazing). 展开更多
关键词 Al metal matrix composites BRAZING transient liquid phase bonding WETTABILITY filler metal
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Effect of Ti-Si-Mg-Al wire on microstructure and mechanical properties of plasma arc in-situ welded joint of SiC_p/Al composites 被引量:3
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作者 雷玉成 薛厚禄 +1 位作者 胡文祥 闫久春 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第2期305-311,共7页
The influence of Ti-Si-Mg-AI wire on microstructure and mechanical properties of SiCp/A1 metal matrix composite joints produced by plasma arc in-situ weld-alloying was investigated. Argon-nitrogen mixture was used as ... The influence of Ti-Si-Mg-AI wire on microstructure and mechanical properties of SiCp/A1 metal matrix composite joints produced by plasma arc in-situ weld-alloying was investigated. Argon-nitrogen mixture was used as plasma gas and Ti-Si-Mg-A1 flux-cored wires as filled composites. Weldments were submitted to tensile test. Meanwhile, the macro morphology and microstructure of the joints were examined. The result shows that the formation ofneedie-like harmful phase A14C3 is effectively inhibited and the wettability of molten pool is improved by adding Ti-Si-Mg-A1 flux-cored wires. With 15Ti-5Si-5Mg-A1 flux-cored wire as filled composite, the maximum tensile strength of the welded joint is 267 MPa, which is up to 83% that of the matrix composites under annealed condition. 展开更多
关键词 plasma arc in-situ welding aluminium matrix composites Ti-Si-Mg-A1 flux-cored wire
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Microstructure and mechanical properties of dissimilar Al-Cu joints by friction stir welding 被引量:9
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作者 张秋征 宫文彪 刘威 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第6期1779-1786,共8页
Dissimilar friction stir welding between 1060 aluminum alloy and annealed pure copper sheet with a thickness of 3 mm was investigated. Sound weld was obtained at a rotational speed of 1050 r/min and a welding speed of... Dissimilar friction stir welding between 1060 aluminum alloy and annealed pure copper sheet with a thickness of 3 mm was investigated. Sound weld was obtained at a rotational speed of 1050 r/min and a welding speed of 30 mm/min. Intercalation structure formed at the crown and Cu/weld nugget (WN) area promotes interracial diffusion and metallurgical bonding of aluminum and copper. However, corrosion morphology reveals the weak bonding mechanism of internal interface, which causes the joint failing across the interface with a brittle-ductile mixed fracture mode. The tensile strength of the joint is 148 MPa, which is higher than that of the aluminum matrix. Crystal defects and grain refinement by severely plastic deformation during friction stir welding facilitate short circuit diffusion and thus accelerate the formation of A14Cu9 and A12Cu intermetallic compounds (IMCs). XRD results show that A14Cu9 is mainly in Cu/WN transition zone. The high dislocation density and formation of dislocation loops are the major reasons of hardness increase in the WN. 展开更多
关键词 aluminum alloy COPPER friction stir welding dissimilar material microstructure mechanical properties
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Influence of welding parameters on material flow,mechanical property and intermetallic characterization of friction stir welded AA6063 to HCP copper dissimilar butt joint without offset 被引量:3
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作者 T.K.BHATTACHARYA H.DAS T.K.PAL 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第9期2833-2846,共14页
Joining of dissimilar aluminium-copper is an emerging area of interest for both research and industry due to its complex nature.Friction stir welding was attempted to evaluate the joint strength without offset at the ... Joining of dissimilar aluminium-copper is an emerging area of interest for both research and industry due to its complex nature.Friction stir welding was attempted to evaluate the joint strength without offset at the butt line between AA6063 to HCP copper sheet under different combination of rotational speed of 800 and 1000 r/min and travel speed of 20 and 40 mm/min.Material flow was studied in detail for different combinations of parameters with optical microscopy and elemental mapping by energy dispersive X-ray spectroscopy(EDS).The results were correlated with the microstructural characteristics and formation of intermetallics at the bond interface using microhardness test and X-ray diffraction(XRD) technique.Material flow clearly suggests that energy input at 800 r/min and 20 mm/min is sufficient to plasticize both the materials with formation of higher amount of thermodynamically stable and hard intermetallic phases Al4Cu9 and Al Cu4(slower cooling rate of 88 K/s) than that at 800 r/min and 40 mm/min(faster cooling rate of 154 K/s),attributed maximum joint strength(~78.6% of aluminium base metal). 展开更多
关键词 friction stir welding(FSW) AA6063 alloy HCP copper material flow
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Microstructure and wear characterization of AA2124/4wt.%B4C nano-composite coating on Ti-6Al-4V alloy using friction surfacing 被引量:8
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作者 I. ESTHER I. DINAHARAN N. MURUGAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第6期1263-1274,共12页
This work is focused on developing AA2124/4 wt.%B4 C nano-composite coatings on Ti-6 A1-4 V using friction surfacing to improve the wear resistance. The composite was produced using conventional stir casting method an... This work is focused on developing AA2124/4 wt.%B4 C nano-composite coatings on Ti-6 A1-4 V using friction surfacing to improve the wear resistance. The composite was produced using conventional stir casting method and coatings were laid using an indigenously-developed friction surfacing machine. The rotational speed of the mechtrode was varied. The microstructure of the composite coating was observed using conventional and advanced microscopic techniques. The sliding wear behavior was evaluated using a pin-on-disc apparatus. The coating geometry(thickness and width) increased with increased rotational speed. The interface was straight without thick intermetallic layer. Homogenous distribution of nano B4C particles and extremely fine grains was observed in the composite coating. The interfacial bonding between the aluminum matrix and B4C particles was excellent. The composite coating improved the wear resistance of the titanium alloy substrate due to the reduction in effective contact area,lower coefficient of friction and excellent interfacial bonding. 展开更多
关键词 aluminum matrix composite titanium friction surfacing coating WEAR
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A review of tool wear prediction during friction stir welding of aluminium matrix composite 被引量:1
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作者 Ashish BIST J.S.SAINI Bikramjit SHARMA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第8期2003-2018,共16页
Friction stir welding is the preferred joining method for aluminium matrix composites. It is a solid-state process which prevents the formation of the intermetallic precipitates responsible for degradation of mechanic... Friction stir welding is the preferred joining method for aluminium matrix composites. It is a solid-state process which prevents the formation of the intermetallic precipitates responsible for degradation of mechanical properties in fusion welds of these composites. The major concern in friction stir welding is the wear of the welding tool pin. The wear is due to the prolonged contact between the tool and the harder reinforcements in the composite materials. This paper provides an overview of the effects of different parameters of friction stir welding on the tool wear. It was found that the total amount of material removed from the tool is in directproportion to the rotational speed of the tool and the length of the weld but inversely proportional to the transverse rate. The result seven demonstrate that the tool geometry also has significant influence on the wear resistance of the tool. The tool even converts itself into a self-optimized shape to minimize its wear. 展开更多
关键词 friction stir welding aluminium matrix composites tool wear
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Microstructural characterization and mechanical properties of friction surfaced AA2024-Ag composites 被引量:6
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作者 Parisa PIRHAYATI Hamed JAMSHIDI AVAL 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第7期1756-1770,共15页
The effects of Ag on the microstructure, mechanical properties, and electrical conductivity of AA2024 aluminum alloy coating were investigated. It was fabricated by friction surfacing as an additive manufacturing proc... The effects of Ag on the microstructure, mechanical properties, and electrical conductivity of AA2024 aluminum alloy coating were investigated. It was fabricated by friction surfacing as an additive manufacturing process. To carry out this investigation, Ag was added by 5.3, 10.6, and 16.0 wt.% to an AA2024 consumable rod by inserting holes in it. It was found that due to the strengthening by solid solution and the formation of precipitates and intermetallic containing Ag, the driving force for grain growth is reduced and consequently the grain size of the coating is decreased. After artificial aging heat treatment, the electrical conductivities of the coatings containing 0 and 16.0 wt.% Ag are increased by 4.15%(IACS) and decreased by 2.15%(IACS), respectively. While considering a linear relationship, it can be proposed that for a 1 wt.% Ag increase, the strength and hardness of the coating will be increased by 1.8% and 1.0%, respectively. It was established that the effect of Al6(Cu,Ag)Mg4 precipitate formation on strengthening is greater than that of Ag-rich intermetallic. 展开更多
关键词 friction surfacing AA2024 aluminum alloy Ag powder AA2024-Ag composite
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Development of processing windows for friction stir spot welding of aluminium Al5052/copper C27200 dissimilar materials 被引量:1
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作者 S. SIDDHARTH T.SENTHILKUMAR M.CHANDRASEKAR 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第6期1273-1284,共12页
Friction stir spot welding technique was used to join dissimilar combinations of aluminium alloy(Al5052)with copperalloy(C27200)and friction stir spot welding windows such as tool rotational speed–dwell time and tool... Friction stir spot welding technique was used to join dissimilar combinations of aluminium alloy(Al5052)with copperalloy(C27200)and friction stir spot welding windows such as tool rotational speed–dwell time and tool rotational speed?plungedepth diagrams for effective joining of these materials were developed.Using a central composite design model,empirical relationswere developed to predict the changes in tensile shear failure load values and interface hardness of the joints with three processparameters such as tool rotational speed,plunge depth and dwell time.The adequacy of the developed model was verified usingANOVA analysis at95%confidence level.Response surface methodology was used to optimize the developed model to maximizetensile strength and minimize interface hardness.A high tensile shear failure load value of3850N and low interface hardness valueof HV81was observed for joints made under optimum conditions,and validation experiments confirmed the high predictability ofthe developed model with error less than2%.The operating windows developed shall act as reference maps for future designengineers in choosing appropriate friction stir spot welding process parameter values to obtain good joints. 展开更多
关键词 friction stir spot welding dissimilar materials aluminium COPPER processing windows response surface methodology
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Influence of rotational speed in friction surfacing of nickel-aluminide reinforced aluminum matrix composite on commercially pure aluminum 被引量:1
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作者 Mobina YOUSEFI Hamed JAMSHIDI AVAL 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第8期2480-2493,共14页
The effect of rotational speed in the friction surfacing of nickel-aluminide reinforced Al-Zn-Mg-Cu alloy matrix composite on commercially pure aluminum was investigated. The nickel-aluminide reinforcement was fabrica... The effect of rotational speed in the friction surfacing of nickel-aluminide reinforced Al-Zn-Mg-Cu alloy matrix composite on commercially pure aluminum was investigated. The nickel-aluminide reinforcement was fabricated by in-situ methods based on adding nickel powders to Al-Zn-Mg-Cu alloy melt during the semi-solid casting process.The findings showed that an increase in the rotational speed from 600 to 1000 r/min raised the coating efficiency from 65% to 76%. Besides, there was no significant difference between coating efficiencies in the coating with and without nickel-aluminide. The outcomes showed that if the coating was applied at a rotational speed of 1000 r/min, a traverse speed of 100 mm/min, and an axial feeding rate of 125 mm/min, the hardness and shear strength of the substrate increased by up to 225% and 195%, respectively. But the wear rate of the substrate dropped by 75%. Although the hardness of the coating containing nickel-aluminide increases by up to 32% compared to the coating without nickel-aluminide, nickel-aluminide does not affect the thermal stability of the coating. 展开更多
关键词 nickel-aluminide aluminum matrix composite friction surfacing wear resistance
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Structural considerations in friction welding of hybrid Al_2O_3-reinforced aluminum composites 被引量:1
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作者 In-Duck PARK Choon-Tae LEE +2 位作者 Hyun-Soo KIM Woo-Jin CHOI Myung-Chang KANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第A01期42-46,共5页
Comparative studies on the relationship between the welding parameters and joining efficiency in the friction welding of hybrid Al203-reinforced aluminum composites were conducted. Metal matrix composites (MMCs) wit... Comparative studies on the relationship between the welding parameters and joining efficiency in the friction welding of hybrid Al203-reinforced aluminum composites were conducted. Metal matrix composites (MMCs) with 37% (volume fraction) aluminum particle were joined by friction welding. The results show that the effects of the rotation speed on the reduction rate of particle size are greater than those of the upset pressure, and the area of the MMC weld zone decreases as the joining efficiency increases, while it is considered that the joining efficiency does not increase as the reduction rate of particle size decreases. During the macro-examination of the bonding interlace, a gray discolored region was observed on the bonding interface, and the center of the region was dark gray. After the micro-examination of the bonding interface, base metal made some second particulate formed by condensed alumina particulate but discoloration part distributed minute alumina particulate without second particulate. Consequently, it was also observed that rotational speed of 3 000 r/min and upset pressure of 63.6 MPa showed a very good.joint. 展开更多
关键词 friction welding hybrid aluminum composite bonding interface joining efficiency metal matrix composite
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