| 引用本文: | 曾敬山,熊 杰,史 文,李 麟.层错能对Fe-Mn-C系TRIP/TWIP钢变形机制影响[J].材料科学与工艺,2013,21(2):72-76.DOI:10.11951/j.issn.1005-0299.20130213. |
| ZENG Jing-shan,XIONG Jie,SHI Wen,LI Lin.Influence of stacking fault energy on deformation mechanism of Fe-Mn-CTRIP/TWIP steels[J].Materials Science and Technology,2013,21(2):72-76.DOI:10.11951/j.issn.1005-0299.20130213. |
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| 摘要: |
| 对三种不同层错能(SFE)Fe-Mn-C系TWIP钢的变形机制进行了研究.结果表明:在淬火态下,TWIP钢组织为全奥氏体,奥氏体晶粒内存在少量退火孪晶.TWIP钢的层错能随着C、Mn含量的增加而增加.层错能为7mJ/m2时,变形后出现大量ε马氏体,且随着应变量的增大,ε马氏体峰增强,表现为单一的TRIP效应；层错能为12mJ/m2时,应变诱导γSymbolnB@SymboleA@SymbolnB@α或γSymbolnB@α的转变及形成少量形变孪晶,表现为TRIP/TWIP效应；层错能为18mJ/m2时,变形后形成大量形变孪晶,表现为单一的TWIP效应,抗拉强度和延伸率分别达到851MPa及49%.随着层错能增加,TWIP钢的断裂机制由沿晶断裂转变为以韧窝为主的塑性断裂. |
| 关键词: TWIP钢 Fe-Mn-C 层错能(SFE) 变形机制 |
| DOI：10.11951/j.issn.1005-0299.20130213 |
| 分类号: |
| 基金项目:国家重点基础研究发展规划(973)资助项目(2010CB630802). |
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| Influence of stacking fault energy on deformation mechanism of Fe-Mn-CTRIP/TWIP steels |
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ZENG Jing-shan,XIONG Jie,SHI Wen,LI Lin
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(State of Science and Engineering,Shanghai University,Shanghai 710072,China)
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| Abstract: |
| The deformation mechanisms of three TWIP steels with different stacking fault energy in Fe-Mn-C system were discussed in this paper.Results show that the microstructure is fully austenitic in quenching state and a few annealing twins in matrix of these steels.With the increasing of content of C and Mn,the stacking faulty energy of TWIP steel increases.When SFE is equal to 7mJ/m2,there are a mass of ε-matensite in TWIP steel after deformation and the volume of ε-martensite enhanced with the increasing of strain,which shows the dominant TRIP effect.When SFE is equal to 12mJ/m2,strain induces γSymbolnB@SymboleA@SymbolnB@α or γSymbolnB@α phase transformation and a few mechanical twins,which shows the TRIP and TWIP effects.When SFE is equal to 18mJ/m2,a large amount of mechanical twins forms after deformation,which expresses single TWIP effect,resulting in a higher tensile strength (up to 851MPa) and elongation (49%).With the increasing of SFE,the fracture mechanism of three TWIP steels turns to ductile fracture with dimples from brittle fracture. |
| Key words: TWIP Steel Fe-Mn-C Stacking Faulty Energy Deformation mechanism |
