爆炸冲击诱发AISI304不锈钢马氏体微观形貌研究  

Study on Morphology of Martensites Transformation Induced by Explosive Shock Loading in AISI304 Stainless Steel

作　　者：王呼和[1] 新巴雅尔[1] 李晓杰[2] WANG Huhe;XINBA Yaer;LI Xiaojie(School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051 [2]大连理工大学工程力学系,辽宁大连116024

出　　处：《材料导报》2022年第10期176-181,共6页Materials Reports

基　　金：国家自然科学基金项目(12072067;11672067);工业装备结构分析国家重点实验室自主研究课题(S18314);内蒙古工业大学科学研究项目(BS2020002)。

摘　　要：利用爆炸冲击装置对AISI304不锈钢板进行了爆炸冲击试验。通过XRD、TEM、EBSD等表征方法,研究了爆炸冲击后AISI304不锈钢板的微观组织演变、马氏体相变特征和晶体学位向关系,探讨了爆炸冲击下马氏体的相变过程。结果表明:爆炸冲击下,奥氏体晶内产生了α马氏体,伴随少量ε马氏体相变;α马氏体位于变形带内部和变形带交叉处,其形核位置限制在变形带内部,α马氏体与母相奥氏体具有K-S位向关系和西山位向关系;ε马氏体形核于大量层错处,其晶界形貌平直,ε马氏体与母相奥氏体保持[110]γ∥[1120]ε和(0001)ε∥(111)γ位向关系;ε马氏体相变与层错的形成有关,而α马氏体相变与变形带、孪晶等微观缺陷的形成和交叉密切相关。Explosive shock loading on AISI304 stainless steel plates was experimentally carried out by explosive impact treatment.The evolution of microstructures,morphological features of martensites and its orientation of crystallography with matrix austenites in treated samples were respectively investigated by XRD,TEM and EBSD,and then martensite transformation induced by shock loading were discussed.Results showed thatαmartensites with a fewεmartensites generated in austenite grain after explosive shock loading;αmartensites were formed at deformation bands and its intersections;αmartensite embryos were confined in deformation bands.Crystallographic orientations betweenαmartensites and matrix austenite contained both K-S relation and Nishiyama relation.Theεmartensites which had straight grain boundary were generated from stacking faults,and its crystallographic orientation with matrix austenite followed by relations of[110]γ∥[1120]εand(0001)ε∥(111)γ.It can be concluded that the formations of theεmartensites are related to stacking faults,andαmartensites are related to deformation bands,twins and its intersections.

关 键 词：AISI304不锈钢 爆炸冲击 α马氏体 Ε马氏体 

分 类 号：TG113.1[金属学及工艺—物理冶金]