反向奥氏体形成模型及其对不锈钢构件性能的影响

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
Sadie Louise Green, Hemantha Kumar Yeddu
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引用次数: 0

摘要

采用不同长度尺度的建模方法,研究了301不锈钢反奥氏体形成动力学及其对汽车前保险杠梁变形的影响。在实验数据的基础上,采用JMAK模型研究了扩散控制的反向奥氏体形成。该模型可用于预测650 ~ 750℃温度范围内反奥氏体的体积分数。采用三维弹塑性相场模型研究了301钢在760℃时的无扩散剪切型反向奥氏体形成。相场模拟表明,由于高温下的高驱动力,相变始于马氏体板条边界,并向板条内部进行。采用有限元分析方法,研究了反奥氏体和马氏体对保险杠横梁在正面和侧面碰撞下变形的影响。有限元模拟表明,反向奥氏体和马氏体的存在提高了光束产生的临界速度和*。电子邮件:hemanth.yeddu@ncl.ac.uk被《工程材料与技术》杂志于2021年2月2日录用。Doi: https://doi.org/10.1115/1.4050134失败。RA分数也会影响保险杠梁的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modeling of Reversed Austenite Formation and Its Effect on Performance of Stainless Steel Components
The kinetics of reversed austenite formation in 301 stainless steel and its effect on the deformation of an automobile front bumper beam are studied by using modelling approaches at different length scales. The diffusion-controlled reversed austenite formation is studied by using the JMAK model, based on the experimental data. The model can be used to predict the volume fraction of reversed austenite in a temperature range of 650 – 750 ◦C. A 3D elastoplastic phase-field model is used to study the diffusionless shear-type reversed austenite formation in 301 steel at 760 ◦C. The phase-field simulations show that reversion initiates at martensite lath boundaries and proceeds inwards of laths due to the high driving force at such high temperature. The effect of reversed austenite (RA) and martensite on the deformation of a bumper beam subjected to front and side impacts is studied by using finite element (FE) analysis. The FE simulations show that the presence of reversed austenite and martensite increased the critical speed at which the beam yielded and ∗Corresponding Author. E-mail: hemanth.yeddu@ncl.ac.uk Accepted for publication in Journal of Engineering Materials and Technology on 2 February 2021. doi: https://doi.org/10.1115/1.4050134 failed. RA fraction also affects the performance of the bumper beam.
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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