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Predicting the Volume Fraction of Martensite in Welded Mild Steel Joint Reinforced with Titanium Alloy Powder
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作者 Alain Ngenzi Stephen A. Akinlabi Anthony K. Muchiri 《Modeling and Numerical Simulation of Material Science》 2023年第2期11-27,共17页
Welded mild steel is used in different applications in engineering. To strengthen the joint, the weld can be reinforced by adding titanium alloy powder to the joint. This results in the formation of incomplete martens... Welded mild steel is used in different applications in engineering. To strengthen the joint, the weld can be reinforced by adding titanium alloy powder to the joint. This results in the formation of incomplete martensite in a welded joint. The incomplete martensite affects mechanical properties. Therefore, this study aims to predict the volume fraction of martensite in reinforced butt welded joints to understand complex phenomena during microstructure formation. To do so, a combination of the finite element method to predict temperature history, and the Koistinen and Marburger equation, were used to predict the volume fraction of martensite. The martensite start temperature was calculated using chemical elements obtained from the dilution-based mixture rule. The curve shape of martensite evolution was observed to be relatively linear due to the small quantity of martensite volume fraction. The simulated result correlated with experimental work documented in the literature. The model can be used in other powder addition techniques where the martensite can be observed in the final microstructure. 展开更多
关键词 Finite Element Analysis martensite Volume Fraction DILUTION Koistinen and Marburger Equation
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NUCLEATION AND GROWTH OF FERROUS MARTENSITES ALONG BOUNDARIES
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作者 GONG Hai ZHANG Weiyi Dalian Railway Institute,Dalian,ChinaZHANG Xiumu Institute of Metal Research,Academia Sinica,Shenyang,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1991年第6期426-430,共5页
Martensites distributed along the austenite grain boundaries and twin boundaries have been examined in Fe-C,Fe-Ni-C and Fe-Cr-Mn-Mo-C alloys.The martensites may nucleate preferentially and grow easily along these boun... Martensites distributed along the austenite grain boundaries and twin boundaries have been examined in Fe-C,Fe-Ni-C and Fe-Cr-Mn-Mo-C alloys.The martensites may nucleate preferentially and grow easily along these boundaries.In the mixed martensites,the preferentially formed one is plate or butterfly martensite 展开更多
关键词 martensite nucleation martensite growth martensite morphology grain boundary twin boundary plate martensite
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Apparent Morphologies and Nature of Packet Martensite in High Carbon Steels 被引量:3
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作者 LIU Yue-jun LI Yi-min +1 位作者 TAN Yu-hua HUANG Bo-yun 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第3期40-46,共7页
The apparent morphologies of packet martensite in eight high carbon steels were researched by using optical microscope, scanning electron microscope, and transmission electron microscope. It was found that the apparen... The apparent morphologies of packet martensite in eight high carbon steels were researched by using optical microscope, scanning electron microscope, and transmission electron microscope. It was found that the apparent morphologies, substructures, and habit plane of packet martensite in high carbon steels are entirely different from that in low carbon steels; the substructures of packet martensite in high carbon steels possess fully twinned structure, while the substructures of individual coarse martensite plates in these steels bear both fully and partially twinned structures. The formation reason for apparent morphologies, substructures and two habit planes (i. e, { 111 }, and { 225}r) of high carbon martensite were discussed in detail. 展开更多
关键词 martensite packet martensite plate martensite high carbon steel
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New Space Morphology and Habit Plane of Low Carbon Martensite 被引量:2
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作者 LIUYue-jun HUANGBo-yun +1 位作者 TANYu-hua FANShu-hong 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2005年第3期46-50,共5页
The as-quenched microstructures of low carbon steels were observed by scanning electron microscope, and the thin foil specimen was examined by transmission electron microscopy. It is found that the space morphology of... The as-quenched microstructures of low carbon steels were observed by scanning electron microscope, and the thin foil specimen was examined by transmission electron microscopy. It is found that the space morphology of low carbon martensite is not lath-like but thin sheet-like, which is designated as sheet-like martensite or packet thin sheet martensite. A three-dimensional model was presented. The reason for exhibiting two apparent morphologies, i.e. double contrast packet and simple contrast packet, in as-quenched low carbon steels was analyzed in detail. It is suggested that the data of martensitic habit plane measured by other procedures should be further inspected using optical metallographic method. The apparent morphologies of low carbon martensite confirm that its habit plane should be {557}_r, rather than {111}_r, {345}_r, nor {213}_r. 展开更多
关键词 lath martensite packet martensite martensite
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Role of thermal martensite in shape memory effect of CoAl and CoNi alloys
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作者 吴冰洁 杨潇 +1 位作者 彭华备 文玉华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第2期382-389,共8页
To address the role of the HCP martensite in CoAl and CoNi shape memory alloys, the relationship between the shape memory effect (SME) and the content of the thermal and stress-induced HCP martensite was invest... To address the role of the HCP martensite in CoAl and CoNi shape memory alloys, the relationship between the shape memory effect (SME) and the content of the thermal and stress-induced HCP martensite was investigated in the solution-treated CoAl and CoNi alloys. In-situ optical observations were employed to investigate the contents of thermal HCP martensite before and after deep cooling and its influence on the stress-induced HCP martensite transformation and SME. The results show that the SME in both the CoAl and the CoNi alloys results from the stress-induced HCP martensite. The role of the thermal HCP martensite in both of them is the strengthening of the matrix. The much higher yield strength in the solution-treated CoAl alloy due to solution strengthening of Al is responsible for its better SME compared with the CoNi alloy. 展开更多
关键词 CoAl alloy CoNi alloy shape memory effect thermal HCP martensite stress-induced HCP martensite solution strengthening
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The Acoustic Emission Effects of Martensite Transformation in Alloys Cr12MoV and Fe-33Ni-4Ti-10Co
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作者 焦成革 张宝祺 +1 位作者 武高辉 姚忠凯 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1989年第2期130-134,共5页
1 Introduction The method of acoustic emission (AE)as a new technique to study the processesin metals and alloys in the solid phase hasbeen widely used and developed since thelast 20 years. Martensite transformationis... 1 Introduction The method of acoustic emission (AE)as a new technique to study the processesin metals and alloys in the solid phase hasbeen widely used and developed since thelast 20 years. Martensite transformationis diffusionless. Because of changing fromone crystal structure to another by coopera-tive shear process the interfacial coherency 展开更多
关键词 acoustic emission martensite transformation martensite morphology
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Bar martensite性能与强化途径
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作者 冯宪琴 刘玉春 《成才之路》 2007年第5期50-50,共1页
按其组织形态马氏体(martensite)组织可以分为条状马氏体(bar martensite)、片状马氏体和蝶状马氏体等。其中条状马氏体又再分为扁条状板条马氏体和薄板状板条马氏体。Wc∠0.2%的钢淬火处理后形成以条状马氏体为主的马氏体混合组织。条... 按其组织形态马氏体(martensite)组织可以分为条状马氏体(bar martensite)、片状马氏体和蝶状马氏体等。其中条状马氏体又再分为扁条状板条马氏体和薄板状板条马氏体。Wc∠0.2%的钢淬火处理后形成以条状马氏体为主的马氏体混合组织。条状马氏体组织具有强韧结合的综合机械性能。强化工艺为淬火后低温回火。 展开更多
关键词 BAR martensite 性能 强化
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Antiphase boundary-like structure in α′′ martensite of TC21 titanium alloy 被引量:2
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作者 许艳飞 刘会群 +2 位作者 易丹青 朱知寿 郑峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第6期1366-1371,共6页
The morphology and formation mechanism of the substructure of martensite in TC21 alloy was investigated by XRD and TEM. The results showed that the martensitic transformation from β to α" occurs upon quenching afte... The morphology and formation mechanism of the substructure of martensite in TC21 alloy was investigated by XRD and TEM. The results showed that the martensitic transformation from β to α" occurs upon quenching after solution treatment between 960-1000 ℃. The antiphase boundary (APB)-like structure was observed clearly in the α" martensite plates. The APB-like contrasts exist along the (001) and (020) planes of α" martensite. This APB-like structure of α" martensite was identified as a kind of stacking fault with an APB-like morphology induced by martensitic transformation and not by order/disorder transition. During martensitic transformation, martensitic domains nucleate and grow, eventually encounter each other, resulting in the formation of the APBdike contrast. 展开更多
关键词 titanium alloy martensitic transformation antiphase boundary (APB) crystal structure
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Interface Migration between Martensite and Austenite during Quenching and Partitioning (Q&P) Process 被引量:19
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作者 Ning ZHONG Xiaodong WANG +1 位作者 Yonghua RONG Li WANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2006年第6期751-754,共4页
An Fe-0.2C-1.5Si-1.67Mn steel was subjected to quenching and partitioning (Q&P) process, and the interface migration between martensite and austenite at an elevated partitioning temperature was observed. The interf... An Fe-0.2C-1.5Si-1.67Mn steel was subjected to quenching and partitioning (Q&P) process, and the interface migration between martensite and austenite at an elevated partitioning temperature was observed. The interface migration is excluded in constrained paraequilibrium (CPE) model. Based on "endpoint" predicted by CPE model the thermodynamic condition of interface migration is analyzed, that is, the difference in the chemical potential of iron in both ferrite (martenisite) and austenite produces the driving force of the iron atoms to migrate from one phase to the other phase. In addition, the interface migration can change the austenite fraction; as a result, the austenite fraction at partitioning temperature may be higher than that at quenching temperature through the interface migration, but this phenomenon cannot be explained by CPE model. 展开更多
关键词 Quenching and partitioning (Q&P) Constrained paraequilibrium (CPE) martensite AUSTENITE Interface migration
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Effect of microstructure on corrosion behavior of high strength martensite steel-A literature review 被引量:10
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作者 Li Wang Chao-fang Dong +3 位作者 Cheng Man Ya-bo Hu Qiang Yu Xiao-gang Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2021年第5期754-773,共20页
The high strength martensite steels are widely used in aerospace,ocean engineering,etc.,due to their high strength,good ductility and acceptable corrosion resistance.This paper provides a review for the influence of m... The high strength martensite steels are widely used in aerospace,ocean engineering,etc.,due to their high strength,good ductility and acceptable corrosion resistance.This paper provides a review for the influence of microstructure on corrosion behavior of high strength martensite steels.Pitting is the most common corrosion type of high strength stainless steels,which always occurs at weak area of passive film such as inclusions,carbide/intermetallic interfaces.Meanwhile,the chromium carbide precipitations in the martensitic lath/prior austenite boundaries always result in intergranular corrosion.The precipitation,dislocation and grain/lath boundary are also used as crack nucleation and hydrogen traps,leading to hydrogen embrittlement and stress corrosion cracking for high strength martensite steels.Yet,the retained/reversed austenite has beneficial effects on the corrosion resistance and could reduce the sensitivity of stress corrosion cracking for high strength martensite steels.Finally,the corrosion mechanisms of additive manufacturing high strength steels and the ideas for designing new high strength martensite steel are explored. 展开更多
关键词 corrosion behavior high strength martensite steel MICROSTRUCTURE additive manufacturing
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Precipitation behavior and martensite lath coarsening during tempering of T/P92 ferritic heat-resistant steel 被引量:7
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作者 Lin-qing Xu Dan-tian Zhang +4 位作者 Yong-chang Liu Bao-qun Ning Zhi-xia Qiao Ze-sheng Yan Hui-jun Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2014年第5期438-447,共10页
Tempering is an important process for T/P92 ferritic heat-resistant steel from the viewpoint of microstructure control, as it facili- tates the formation of final tempered martensite under serving conditions. In this ... Tempering is an important process for T/P92 ferritic heat-resistant steel from the viewpoint of microstructure control, as it facili- tates the formation of final tempered martensite under serving conditions. In this study, we have gained deeper insights on the mechanism underlying the microstructural evolution during tempering treatment, including the precipitation of carbides and the coarsening of martensite laths, as systematically analyzed by optical microscopy, transmission electron microscopy, and high-resolution transmission electron mi- croscopy. The chemical composition of the precipitates was analyzed using energy dispersive X-ray spectroscopy. Results indicate the for- mation of M3C (cementite) precipitates under normalized conditions. However, they tend to dissolve within a short time of tempering, owing to their low thermal stability. This phenomenon was substantiated by X-ray diffraction analysis. Besides, we could observe the precipitation of fine carbonitrides (MX) along the dislocations. The mechanism of carbon diffusion controlled growth of M23C6 can be expressed by the Zener's equation. The movement of Y-junctions was determined to be the fundamental mechanism underlying the martensite lath coarsening process. Vickers hardness was estimated to determine their mechanical properties. Based on the comprehensive analysis of both the micro- structural evolution and hardness variation, the process of tempering can be separated into three steps. 展开更多
关键词 ferritic steel heat resisting TEMPERING PRECIPITATION martensite COARSENING
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Reverse Transformation Behavior of Martensite Formed during Cooling Proce under Constant Stress in TiNi Alloys 被引量:1
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作者 怀利敏 崔立山 +1 位作者 张来斌 郑雁军 《Petroleum Science》 SCIE CAS CSCD 2004年第3期62-65,共4页
The reverse transformation temperature and recovery strain ratio of the martensite formed during the cooling process under a constant stress in TiNi shape memory alloy wires are studied in this paper. Results sh... The reverse transformation temperature and recovery strain ratio of the martensite formed during the cooling process under a constant stress in TiNi shape memory alloy wires are studied in this paper. Results show that a higher level of the applied constant stress during the cooling process will induce martensite with a higher reverse martensitic transformation start temperature As and a smaller recovery strain ratio. Similarly, a prestrain at the room temperature elevates the As temperature and decreases the recovery strain ratio. However, the As temperature and the recovery strain ratio of the martensite formed during the cooling process under a constant stress are lower than those of the martensite formed by prestrain at the room temperature. 展开更多
关键词 Shape memory alloy TINI reverse martensitic transformation constant stress
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Ultra-high cycle fatigue behavior of high strength steel with carbide-free bainite/martensite complex microstructure 被引量:5
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作者 Xue-xia Xu Yang Yu Wen-long Cui Bing-zhe Bai Jia-lin Gu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2009年第3期285-292,共8页
The ultra-high cycle fatigue behavior of a novel high strength steel with carbide-free bainite/martensite (CFB/M) complex microstructure was studied. The ultra-high cycle fatigue properties were measured by ultrason... The ultra-high cycle fatigue behavior of a novel high strength steel with carbide-free bainite/martensite (CFB/M) complex microstructure was studied. The ultra-high cycle fatigue properties were measured by ultrasonic fatigue testing equipment at a frequency of 20 kHz. It is found that there is no horizontal part in the S-N curve and fatigue fracture occurs when the life of specimens exceeds 10^7 cycles. In addition, the origination of fatigue cracks tends to transfer from the surface to interior of specimens as the fatigue cycle exceeds 10^7, and the fatigue crack originations of many specimens are not induced by inclusions, but by some kind of "soft structure". It is shown that the studied high strength steel performs good ultra-high cycle fatigue properties. The ultra-high fatigue mechanism was discussed and it is suggested that specific CFB/M complex microstructure of the studied steel contributes to its superior properties. 展开更多
关键词 high strength steel ultra-high cycle fatigue BAINITE martensite fatigue behavior
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ORDER STATE AND STABILITY OF MARTENSITE IN AN AIR-QUENCHED Cu-Zn-Al ALLOY 被引量:8
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作者 Wang Mingpu Jin Zhanpeng +1 位作者 Yin Zhimin Xu Genyin(Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083 Anhui Institute of Technology, Hefei 230069) 《中国有色金属学会会刊:英文版》 CSCD 1996年第3期113-118,共6页
ORDERSTATEANDSTABILITYOFMARTENSITEINANAIR-QUENCHEDCu-Zn-AlALLOY¥WangMingpu;JinZhanpeng;YinZhimin;XuGenyin(De... ORDERSTATEANDSTABILITYOFMARTENSITEINANAIR-QUENCHEDCu-Zn-AlALLOY¥WangMingpu;JinZhanpeng;YinZhimin;XuGenyin(DepartmentofMateria... 展开更多
关键词 shape memory ALLOY CU-ZN-AL ALLOY martensite ORDERING STABILIZATION
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STABILIZATION OF MARTENSITE IN Cu-Zn-Al ALLOY AND ITS REVERSE SHAPE MEMORY EFFECT 被引量:5
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作者 Cheng Yan and Wang Mingpu Department of Materials Science and Engineering, Central South University of Technology, Changsha 410083, P. R. China 《中国有色金属学会会刊:英文版》 CSCD 1998年第4期121-125,共5页
INTRODUCTIONThestabilizationofmartensitereferstothephenomenonthatthereversetransformationstartandfinishtempe... INTRODUCTIONThestabilizationofmartensitereferstothephenomenonthatthereversetransformationstartandfinishtemperatures(AsandAf)i... 展开更多
关键词 SMA STABILIZATION of martensite REVERSE SHAPE MEMORY EFFECT
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Martensite transformation induced by deformation and its phase electrochemical behavior for stainless steels AISI 304 and 316L 被引量:9
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作者 BaofengDing SalihHmidaAbubakir 《Journal of University of Science and Technology Beijing》 CSCD 2002年第6期437-440,共4页
The martensite transformation induced by tensile elongation and its effect onthe behavior of phase electrochemistry of AISI 304 and 316L in 3.5% NaCl solution were studied. Theresults show that the content of α′-mar... The martensite transformation induced by tensile elongation and its effect onthe behavior of phase electrochemistry of AISI 304 and 316L in 3.5% NaCl solution were studied. Theresults show that the content of α′-martensite in stainless steel 304 increases with the truestrain. As α′-martensite content increased, free corrosion potential and pitting potential ofstainless steel 304 in 3.5% NaCl solution appeared the change trend of a minimum. It was also foundthat pitting nucleated preferentially at the phase interfaces between martensite and austenite.There existed apparent difference between electrochemical properties of austenite and of martensitefor stainless steel 304 and 316L in 3.5% NaCl solution. 展开更多
关键词 austenite stainless steel martensite transformation phaseelectrochemistry pitting corrosion
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Influence of rapid heating process on the microstructure and tensile properties of high-strength ferrite–martensite dual-phase steel 被引量:2
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作者 Pei Li Jun Li +2 位作者 Qing-ge Meng Wen-bin Hu Chun-fu Kuang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第9期933-941,共9页
Three low-carbon dual-phase (DP) steels with almost constant martensite contents of 20vo1% were produced by intercritical annealing at different heating rates and soaking temperatures. Microstructures prepared at lo... Three low-carbon dual-phase (DP) steels with almost constant martensite contents of 20vo1% were produced by intercritical annealing at different heating rates and soaking temperatures. Microstructures prepared at low temperature (1043 K, FH1) with fast-heating (300 K/s) show banded ferrite/martensite structure, whereas those soaked at high temperature (1103 K, FH2) with fast heating reveal blocky martensite uniformly distributed in the fine-grained ferrite matrix. Their mechanical properties were tested under tensile conditions and compared to a slow-heated (5 K/s) reference material (SH0). The tensile tests indicate that for a given martensite volume fraction, the yield strength and total elongation values are noticeably affected by the refinement of ferrite grains and the martensite morphology. Metallographic observations reveal the formation of microvoids at the ferrite/martensite interface in the SH0 and FH2 samples, whereas microvoids nucleate via the fracture of banded martensite particles in the FH1 specimen. In addition, analyses of the work-hardening behaviors of the DP microstructures using the differential Crussard-Jaoul technique demonstrate two stages of work hardening for all samples. 展开更多
关键词 high-strength steel martensite FERRITE HEATING MICROSTRUCTURE tensile properties grain refinement
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ON THE STABILIZATION OF THERMOELASTIC MARTENSITE IN A Cu-Zn-Al ALLOY 被引量:2
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作者 WANG Mingpu, LIU Jinwen Central South University of Technology,Changsha,China Lecturer,Dept.of Materials Science and Engineering,Central South University of Technology,Changsha 410083,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1990年第6期439-441,共3页
The stabilization of thermoelastic martensite in a rapidly solidified Cu-Zn-A1 alloy is be- lieved to be the process of disordering in atomic configuration during which the structure of martensite gradually transforms... The stabilization of thermoelastic martensite in a rapidly solidified Cu-Zn-A1 alloy is be- lieved to be the process of disordering in atomic configuration during which the structure of martensite gradually transforms into N9R(b/a=1/3^(1/2))from M18R.This is dependent upon the intrinsic decomposition tendency of the martensite. 展开更多
关键词 Cu-Zn-Al alloy shape memory alloy thermoelastic martensite STABILIZATION
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Effects of Austenite Stabilization on the Onset of Martensite Transformation in T91 Steel 被引量:2
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作者 Baoqun NING Yongchang LIU +2 位作者 Qingzhi SHI Zhiming GAO Liushuan YANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2008年第2期202-206,共5页
The influences of thermal stabilization of austenitic on the onset temperature for a martensite transformation in T91 ferritic heat-resistant steel were studied by high-resolution differential dilatometer. The phase t... The influences of thermal stabilization of austenitic on the onset temperature for a martensite transformation in T91 ferritic heat-resistant steel were studied by high-resolution differential dilatometer. The phase transformation kinetic information was obtained by adopting lever rule from the recorded dilatometric curves. The results show that an inverse stabilization, featured by the damage of "the atmosphere of carbon atoms" and the increase of the starting temperature for martensite transformation takes place when the T91 ferritic steel is isothermally treated above the Ms point, and it becomes strong with increasing the holding time. While the continued temperature for martensite transformation decreases gradually when isothermally holding at a temperature below Ms point. The observed inverse stabilization behavior could be attributed to the relatively high temperature of Ms point in the explored T91 ferritic heat-resistant steel. 展开更多
关键词 T91 ferritic heat-resistant steel Austenitic thermal stabilization martensite MICROSTRUCTURE
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EFFECT OF SILICON ON PRODUCING DUCTILE IRON WITH COMPLEX STRUCTURE OF BAINITE AND MARTENSITE 被引量:2
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作者 Y.P.Zhang J.X.Zhu +1 位作者 Y.Q.Wang J.Y.Su 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1998年第1期25-28,共4页
This paper deals with an important role of silicon in producing ductile iron with quenched complex structure of bainite and martensite. The samples are cast in permanent mold and quenched in solution of sodium silicat... This paper deals with an important role of silicon in producing ductile iron with quenched complex structure of bainite and martensite. The samples are cast in permanent mold and quenched in solution of sodium silicate. The result of thc experiments shows that the austenizing temperature should rise with increasing silicon content, otherwise much undissolved ferrite is present in the matrix after quenching. However the undissolvec ferrite can be decreased greatly or even eliminated by adding appropriate amount of ooron. On this condition, the amount of bainite gets increasing and the amount of residual austenite decreasing with the silicon cortent increasing. An approach has also been made to the mechanism of the effect of silicon on the transformation of bainite in ductile iron. The T.T.T. curves measured show that the increase of sllicon content causes the curve to shift to the left. This is quite different from the fact in steel. 展开更多
关键词 ductile iron silicon content BAINITE martensite
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