双相不锈钢应力应变曲线数值模拟Numerical Simulation of Stress-Strain Curve of Duplex Stainless Steel
杨庆祥,吴晶,赵宏,Park Joong-keun
摘要(Abstract)：
设计了成分与SAF2205双相不锈钢中奥氏体相和铁素体相成分相近的单相奥氏体不锈钢和铁素体不锈钢,根据其应力-应变曲线,采用有限元方法,计算了双相不锈钢的应力-应变曲线,并与实测值进行对比,同时对奥氏体的体积分数和双相不锈钢中两相屈服强度之比(C*)等影响双相不锈钢力学性能的因素进行了讨论。由单相奥氏体和铁素体不锈钢的应力-应变曲线计算的双相不锈钢的应力-应变曲线和实测的双相不锈钢应力-应变曲线吻合很好,说明本文所建立的有限元模型正确。计算表明奥氏体体积分数对应力-应变曲线的弹性部分没有影响,而对塑性部分影响较大。在外应力作用下,随着奥氏体体积分数的增加,应变增加;不同奥氏体与铁素体屈服强度之比(C*)对应力-应变曲线弹性部分没有影响,而对塑性部分略有影响,在外加应力作用下,随着C*增加,应变增加。
关键词(KeyWords)： 双相不锈钢;应力-应变曲线;数值模拟;有限元模型
基金项目(Foundation): 教育部回国留学基金
作者(Author): 杨庆祥,吴晶,赵宏,Park Joong-keun
参考文献(References)：
- 1肖纪美.不锈钢的金属学问题[M].北京:冶金工业出版社,1983:147~278.
- 2Notten G,Charles J,Nassan V.Duplex Stainless Steels97-5thWorld Conference:9-115,Netherlands,21-23Oct,1997.
- 3Chen T H,Yang J R.Effect of solutiontreatment and continuous cooling onσ-phase precipitationin2205duplexstainless steel[J].Materials Science and Engineering A,2001,311:28~41.
- 4Lee MK,Cho HS,Choi D C.Effect of isothermal treatment of SAF2205duplex stainless steel on migration ofα/γinterface boundary and growth of austenite[J].Journal of Alloys and Compounds,1999,285:156~161.
- 5毛萍莉,苏国跃,杨柯.0Cr17Mn14Mo2N双相不锈钢组织与性能的关系[J].材料热处理学报,2001,22(3):19~22.MAOPingli,SUGuoyue,YANGKe.The relationshipof properties and microstructure of OCr17Mn14Mo2Nduplexstainless steel[J].Trans Mater Heat Treat,2001,22(3):1922.
- 6孙文山.新型双相不锈钢的进展及其在工业中的应用[J].兵器材料科学与工程,1994,17(6):51~56.
- 7Akdut N.Phase morphology andfatigue lives of nitrogen alloyed duplex stainless steels[J].International Journal of Fatigue,1999,21:S97~S103.
- 8Lin J,Chakrabarti DJ.Grain structure and microtexture evolution during superplastic formating of a duplex stainless[J].Acta Mater,1996,44:4647~4661.
- 9Bugat S,Besson J,Pineau A.Micromachanical modeling of the behavior of duplexstainless steels[J].Computational Materials Science,1999,16:158~166.
文章评论(Comment)：
|
||||||||||||||||||
|
||||||||||||||||||