Fe-0.1C-5Mn中锰钢在渐进相变诱发塑性效应过程中的显微组织演变

张梅; 栗文浩; 陈杨飞; 蒋洋; 郭晓菲; 董瀚

doi:10.1007/s12613-024-2963-z

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文章导航 > 矿物冶金与材料学报（英文） > 2025 > 二校

Mei Zhang, Wenhao Li, Yangfei Chen, Yang Jiang, Xiaofei Guo, and Han Dong, Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe–0.1C–5Mn medium manganese steel, Int. J. Miner. Metall. Mater.,(2025). https://doi.org/10.1007/s12613-024-2963-z

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Mei Zhang, Wenhao Li, Yangfei Chen, Yang Jiang, Xiaofei Guo, and Han Dong, Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe–0.1C–5Mn medium manganese steel, Int. J. Miner. Metall. Mater.,(2025). https://doi.org/10.1007/s12613-024-2963-z

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研究论文

Fe-0.1C-5Mn中锰钢在渐进相变诱发塑性效应过程中的显微组织演变

1)
上海大学材料科学与工程学院, 上海200444, 中国
2)
上海大学先进特殊钢国家重点实验室, 上海200444, 中国

通讯作者:
张梅    E-mail: zmei@shu.edu.cn

郭晓菲    E-mail: xiaofei_guo@shu.edu.cn

董瀚    E-mail: 13910077790@163.com

文章亮点

(1) 系统研究了Fe–0.10C–5Mn钢中的吕德斯带和PLC效应的形成。

(2) 系统研究了Fe–0.10C–5Mn钢在拉伸过程中的相变诱发塑性机制。

(3) 系统研究了Fe–0.10C–5Mn钢的形变过程中的断裂机制。

中文摘要

研究了冷轧和临界退火的中锰钢（Fe–0.10C–5Mn）在单轴拉伸试验过程中的微观结构演变。在扫描电子显微镜、透射电子显微镜和 X 射线衍射分析下进行了原位观察，以确定渐进相变诱发塑性过程和相关断裂机制的特征。通过数字图像相关的局部应变测量，对这些发现进行了讨论。结果表明，钢中吕德斯带的形成仅限于应变1.5%，这主要是由于极少量稳定性较差的残余奥氏体（RA）发生了马氏体相变，导致局部应力集中和应变硬化，并进一步延缓了屈服。小尺寸的残余奥氏体表现出更高的稳定性，逐渐转变为马氏体，并具有稳定扩展的波特文–勒夏特列效应。在断裂前，残余奥氏体的体积分数从 26.8%逐渐下降到8.2%。在变形后期，裂纹主要起源于奥氏体/马氏体、铁素体/马氏体相界面以及铁素体相内。

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Research Article

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe–0.1C–5Mn medium manganese steel

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Abstract

Abstract

In this study, the microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel (Fe–0.10C–5Mn) was investigated during uniaxial tensile testing. In-situ observations under scanning electron microscopy, transmission electron microscopy, and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation mechanisms. These findings were discussed with the local strain measurements via digital image correlation. The results indicated that Lüders band formation in the steel was limited to 1.5% strain, which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite (RA), which led to localized stress concentrations and strain hardening and further retardation of yielding. The small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin–Le Chatelier effect. The volume fraction of RA gradually decreased from 26.8% to 8.2% prior to fracture. In the late deformation stage, fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.
- medium-Mn steel;
- retained austenite;
- progressive transformation-induced plasticity effect;
- local strain;
- fracture initiation

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