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首页> 外文期刊>International Journal of Plasticity >Computational simulation of the dependence of the austenitic grain size on the deformation behavior of TRIP steels
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Computational simulation of the dependence of the austenitic grain size on the deformation behavior of TRIP steels

机译：奥氏体晶粒尺寸对TRIP钢变形行为影响的计算模拟

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摘要

Due to the strain-induced martensitic transformation which occurs during plastic deformation, a transformation-induced plasticity (TRIP) phenomenon is generated. With the TRIP phenomenon, the TRIP steel possesses favorable mechanical properties such as high strength, ductility and toughness, and is frequently employed as a structural material. In the past, several researchers clarified experimentally that the strain-induced martensitic transformation and the deformation behavior of TRIP steel depend upon the austenitic grain size. In order to obtain the expected mechanical properties of TRIP steel through control of the austenitic grain size, prediction and control of the material characteristics in the deformation processes is essential. Here, the new strain-induced martensitic transformation kinetics model and constitutive equation of TRIP steels are proposed by considering the dependence of the austenitic grain size. Then, the deformation behavior of a type 304 austenitic stainless steel cylinder is simulated under different environmental temperatures with the various austenitic grain sizes by the finite-element method along with newly-proposed constitutive equations. Finally, the validity of proposed constitutive equations and the possibility of the improvement of the mechanical properties through control of the austenitic grain size are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved. [References: 18]
机译：由于在塑性变形过程中发生应变诱发的马氏体相变，因此产生了相变诱发可塑性（TRIP）现象。由于存在TRIP现象，TRIP钢具有良好的机械性能，例如高强度，延展性和韧性，并且经常被用作结构材料。过去，一些研究人员通过实验澄清，应变诱发的马氏体相变和TRIP钢的变形行为取决于奥氏体晶粒尺寸。为了通过控制奥氏体晶粒尺寸获得TRIP钢的预期机械性能，预测和控制变形过程中的材料特性至关重要。在此，考虑到奥氏体晶粒尺寸的依赖性，提出了新的TRIP钢应变诱发马氏体转变动力学模型和本构方程。然后，通过有限元方法以及新提出的本构方程，模拟了在不同环境温度下具有不同奥氏体晶粒尺寸的304型奥氏体不锈钢圆柱的变形行为。最后，讨论了所提出的本构方程的有效性以及通过控制奥氏体晶粒尺寸来改善机械性能的可能性。 （C）2000 Elsevier ScienceLtd。保留所有权利。 [参考：18]

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