Deformation Induced Martensite Transformation and its Magnetic Memory Effect of Austenitic 304 Stainless Steel
-
摘要: 通过金相观察和透射电镜分析，研究了奥氏体304不锈钢试样拉伸变形过程中发生马氏体相变和位错增殖对材料磁性的影响。运用铁素体检测仪和磁记忆检测仪分别研究了马氏体相在试样内的分布规律和试样表面磁场强度分布特征。结果表明，奥氏体304不锈钢发生形变诱发马氏体相变后，试样表面的磁场强度分布特征与马氏体相分布规律之间具有明显的对应关系，试样表面磁场强度变化可反映材料内的组织变化与应力集中情况。磁记忆检测技术可以应用于奥氏体304不锈钢的组织变化检测分析，并有效地诊断材料中的应力集中区。Abstract: By metallographic examination and transmission electron microscope analysis, the effects of martensite phase transformation and dislocation multiplication of austenitic 304 stainless steel during the tensile strain process were investigated. Ferritic detector and metal magnetic memory technology were used to analyze the distribution of martensite phase in specimen and the distribution of magnetic density on the specimen surface, respectively. The results showed that a corresponding relation existed between the martensite phase distribution and magnetic density distribution of austenite 304 stainless steel containing deformation induced martensite transformation. The magnetic density change can reflect the morphology change and stress concentration in material. Metal magnetic memory technology can be used to analyze the microstructure change of austenite 304 stainless steel. The stress concentration position can be diagnosed effectively.
-
Keywords:
- Magnetic memory testing /
- Stainless steel /
- Austenite /
- Martensite /
- Microstructure change
-
-
[1] 徐祖耀.马氏体相变与马氏体[M].北京：科学出版社，1999. [2] 胡 钢，许淳淳，张新生，等.冷加工对304不锈钢孔蚀敏感性的影响[J].中国腐蚀与防护学报,2002,22(4):198-201. [3] 许淳淳，张新生，胡 钢.马氏体相变对304不锈钢应力腐蚀的影响[J].材料研究学报,2003,17(3):310-314. [4] 胡德林.金属学及热处理[M].西安：西北工业大学出版社，1995. [5] Doubov A A. A study of metal properties using the method of magnetic memory[J]. Metal Science and Heat Treatment,1997,39(9):401-402 [6] Doubov A A. Screening of weld quality using the metal magnetic memory[J]. Welding in the World,1998,41(3):196-199. [7] 任吉林，林俊明.金属磁记忆检测技术[M].北京：中国电力出版社,2000.
计量
- 文章访问数: 2
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
