A micromechanical study on the correlation of the microstructure and failure mechanism of dual-phase steels under tension

Q2 Materials Science

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI:10.5267/j.esm.2023.1.003

M. S. Mohsenzadeh

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Abstract

In this study, the influence of the volume fraction of the martensite phase as well as the size of the martensite particles on the mechanism of particle fracture in dual-phase steel were examined. A combined continuum/dislocation based approach was used in order to model the average stress in the martensite particles. It was found that the model predictions are in accordance with the experimental results. For the same volume fraction of the martensite particles, the model predicts an increase of the internal stress and the average stress in the martensite particles with increasing the particles size. Since the fracture strength of the martensite depends on its volume fraction, the particle size has no effect on the mechanism of particle fracture. Increasing the volume fraction of the martensite particles results in the enhancement of the internal stress in the martensite particles. However, it has a slight influence on the average stress in the particles. Nevertheless, because of decreasing the fracture strength of martensite with increasing its volume fraction, this parameter has a main role in the occurrence of the particle fracture mechanism.

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拉伸作用下双相钢组织与失效机理的微观力学研究

本研究考察了马氏体相体积分数和马氏体颗粒尺寸对双相钢颗粒断裂机理的影响。为了模拟马氏体颗粒中的平均应力，采用了基于连续统/位错的组合方法。结果表明，模型预测与实验结果吻合较好。对于相同体积分数的马氏体颗粒，该模型预测随着颗粒尺寸的增大，马氏体颗粒的内应力和平均应力增大。由于马氏体的断裂强度取决于其体积分数，因此颗粒尺寸对颗粒断裂机制没有影响。随着马氏体体积分数的增加，马氏体颗粒的内应力增大。然而，它对颗粒中的平均应力有轻微的影响。然而，由于马氏体的断裂强度随着体积分数的增加而降低，该参数在颗粒断裂机制的发生中起主要作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Solid Mechanics Materials Science-Metals and Alloys

CiteScore

3.00

自引率

0.00%

发文量

期刊介绍： Engineering Solid Mechanics (ESM) is an online international journal for publishing high quality peer reviewed papers in the field of theoretical and applied solid mechanics. The primary focus is to exchange ideas about investigating behavior and properties of engineering materials (such as metals, composites, ceramics, polymers, FGMs, rocks and concretes, asphalt mixtures, bio and nano materials) and their mechanical characterization (including strength and deformation behavior, fatigue and fracture, stress measurements, etc.) through experimental, theoretical and numerical research studies. Researchers and practitioners (from deferent areas such as mechanical and manufacturing, aerospace, railway, bio-mechanics, civil and mining, materials and metallurgy, oil, gas and petroleum industries, pipeline, marine and offshore sectors) are encouraged to submit their original, unpublished contributions.