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Dependence of deformation behavior on grain size and strain rate in an ultrahigh strength-ductile Mn-based TRIP alloy

机译:超高强度韧性锰基TRIP合金的变形行为对晶粒尺寸和应变率的依赖性

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摘要

A novel ultra-high strength TRIP (transformation induced plasticity) steel, with ~ 1.5 GPa strength and good ductility of ~26% has been produced. The microstructure consists of ultrafine ferrite, and a large volume fraction of austenite. The flow stress was significantly increased by a reduction in the grain size, but the effect of strain rate on the flow stress was negligible. The formation of stress induced martensite was found to increase linearly with strain, and a reduction in the grain size correlated with an increase in the stress required to form the martensite.
机译:已经生产出一种新颖的超高强度TRIP(相变诱导塑性)钢,强度约为1.5 GPa,延展性约为26%。显微组织由超细铁素体和大体积奥氏体组成。晶粒尺寸的减小使流动应力显着增加,但是应变速率对流动应力的影响可以忽略不计。发现应力引起的马氏体的形成随应变线性增加,并且晶粒尺寸的减小与形成马氏体所需的应力的增加相关。

著录项

  • 来源
    《Materials Science and Engineering》 |2016年第20期|35-42|共8页
  • 作者单位

    Institute for Frontier Materials (IFM), Deakin University, Geelong, VIC 3217, Australia,Department of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;

    R&D Centre of Wuhan Iron & Steel Corp. (WISCO), Wuhan 430080, China;

    Institute for Frontier Materials (IFM), Deakin University, Geelong, VIC 3217, Australia;

    R&D Centre of Wuhan Iron & Steel Corp. (WISCO), Wuhan 430080, China;

    Institute for Frontier Materials (IFM), Deakin University, Geelong, VIC 3217, Australia;

    Institute for Frontier Materials (IFM), Deakin University, Geelong, VIC 3217, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    TRIP steel; Strain rate; Grain size; Martensitic transformation; Liiders band propagation (LBP);

    机译:TRIP钢;应变率;晶粒大小;马氏体转变;Liiders频带传播(LBP);

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