李阳,肖桂勇,陈鹭滨,吕宇鹏

• 1:山东大学材料液固结构演变与加工教育部重点实验室
• 2:山东大学材料科学与工程学院

摘要(Abstract)：

采用商品钢35CrMnSiA为材料,对比了其经过淬火-分配(Q-P)和调质热处理后的显微组织及力学性能,并通过分子动力学(MD)模拟方法研究Q-P组织的力学机理。研究表明,商品钢35CrMnSiA经Q-P处理可获得抗拉强度/总伸长率为1523 MPa/17.86%,高于传统调质处理后的1145 MPa/15.23%。实验数据与MD模拟均表明,Q-P提高钢的塑性主要通过残留奥氏体在应力作用下诱发马氏体转变而产生的相变诱发塑性(TRIP)实现的。另外,应力诱发马氏体转变同时能促进钢的应变强化。

关键词(KeyWords)： 35CrMnSiA钢;分子动力学;力学性能;淬火-分配

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李阳,肖桂勇,陈鹭滨,吕宇鹏

参考文献(References)：

• [1]Speer J G,Matlock D K,De Cooman B C,et al.Carbon partitioning into austenite after martensite transformation[J].Acta Materialia,2003,51(9):2611-2622.
• [2]Moor E De,Speer J G,Matlock D K,et al.Effect of Si,Al and Mo alloying on tensile properties obtained by quenching and partitioning[C]∥MS&T,Pittsburgh:2009.
• [3]Mola J,De Cooman B C.Quenching and partitioning processing of transformable ferritic stainless steels[J].Scripta Materialia,2011,65(9):834-837.
• [4]Hepburn D J,Ackland G J.Metallic-covalent interatomic potential for carbon in iron[J].Physics Review B,2008,78(16):165115.
• [5]Plimpton S J.Fast parallel algorithms for short-range molecular dynamics[J].Journal Computational Physics,1995,117(1):1-19.
• [6]Stukowski A.Visualization and analysis of atomistic simulation data with OVITO-the open visualization tool[J].Modelling and Simulation in Material Science and Engineering,2010,18:015012.
• [7]Honeycutt J D,Andersen H C.Molecular dynamics study of melting and freezing of small Lennard-Jones clusters[J].Journal of Physical Chemistry,1987,91(19):4950-4963.
• [8]Tamura I.Deformation-induced martensitic transformation and transformation-induced plasticity in steels[J].Metal Science,1982,16(5):245-253.
• [9]Chatterjee S,Bhadeshia H K D H.Transformation induced plasticity assisted steels:stress or strain affected martensitic transformation?[J].Material Science and Technology,2007,23(9):1101-1104.
• [10]Moor E De,Lacroix S,Clarke A J,et al.Effect of retained austenite atabilized via quench and partitioning on the strain hardening of martensitic steels[J].Metallurgical and Materials Transactions A,2008,39(11):2586-2595.
• [11]Wang Y,Zhang K,Guo Z H,et al.A new effect of retained austenite on ductility enhancement in high strength bainitic steel[J].Material Science and Engineering A,2012,552:288-294.

文章评论(Comment)：