锰影响中锰钢<strong>TRIP</strong>效应的晶体塑性计算

doi:10.11901/1005.3093.2025.311

材料研究学报

2026, Vol. 40

Issue (6): 437-449 DOI: 10.11901/1005.3093.2025.311

研究论文

本期目录 | 过刊浏览

锰影响中锰钢TRIP效应的晶体塑性计算

邓智文¹^,², 贾春妮²(

), 刘腾远², 路轶²^,³, 郑成武², 王培²(

), 李殿中²

^1.东北大学材料科学与工程学院沈阳 110089
^2.中国科学院金属研究所沈阳材料科学国家研究中心沈阳 110016
^3.中国科学技术大学材料科学与工程学院沈阳 110016

Crystal Plasticity Calculations on Influence of Mn-content on Transformation Induced Plasticity Effect for Medium-Mn Steels

DENG Zhiwen¹^,², JIA Chunni²(

), LIU Tengyuan², LU Yi²^,³, ZHENG Chengwu², WANG Pei²(

), LI Dianzhong²

^1.School of Materials Science and Engineering, Northeastern University, Shenyang 110089, China
^2.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

引用本文:

邓智文, 贾春妮, 刘腾远, 路轶, 郑成武, 王培, 李殿中. 锰影响中锰钢TRIP效应的晶体塑性计算[J]. 材料研究学报, 2026, 40(6): 437-449.
Zhiwen DENG, Chunni JIA, Tengyuan LIU, Yi LU, Chengwu ZHENG, Pei WANG, Dianzhong LI. Crystal Plasticity Calculations on Influence of Mn-content on Transformation Induced Plasticity Effect for Medium-Mn Steels[J]. Chinese Journal of Materials Research, 2026, 40(6): 437-449.

全文: PDF(18725 KB) HTML

摘要:

使用耦合形变诱导相变的晶体塑性模型计算中锰钢变形过程中介观尺度的非均匀弹塑性变形和锰影响中锰钢性能的TRIP效应，研究了Mn含量对中锰钢变形机制的影响。基于两种典型的中锰钢0.2C-7Mn和0.2C-5Mn在临界区热处理过程中Mn元素配分导致的奥氏体成分差异和耦合形变诱导相变的晶体塑性模型，并根据奥氏体层错能研究奥氏体机械稳定性对中锰钢力学性能的影响，计算了其在单轴拉伸过程中奥氏体与铁素体间的应力应变配分和奥氏体形变诱导的马氏体相变。结果表明，7Mn钢奥氏体的高层错能使其机械稳定性提高。5Mn钢的马氏体相变发生在小应变范围内，而7Mn钢在更大的外加应变条件下发生形变诱导相变且马氏体形核更加弥散。这两种钢形变诱导相变的不同产生了不同的TRIP效应，使其力学性能也显著不同。

关键词 ：金属材料, 中锰钢, 晶体塑性, 形变诱导相变, 力学性能

Abstract：

As a typical representative steel of the third generation of advanced high-strength steels (AHSS), medium-Mn steel has a great strength-ductility synergy. It enables effective achievement of safety and lightweighting in design and manufacture for vehicles. In order to understand the deformation-induced plasticity effect of medium-Mn steels, herein, the influence of Mn-content on the heterogeneous deformation behavior at the mesoscale during the deformation of medium-Mn steels was studied via calculating with a crystal plasticity model coupled with deformation-induced martensitic transformation. Furthermore, the partition of stress-strain between austenite and ferrite during uniaxial tension, as well as the martensitic phase transformation process triggered by the deformation of austenite were calculated, whilst, the changes in Mn distribution caused by the difference in austenite composition during the critical zone heat treatment of two typical Mn-steels (0.2C-7Mn and 0.2C-5Mn) were also taken into account. Besides, the impact of austenite mechanical stability on the mechanical properties of the medium-Mn steels was also studied in terms of the austenite stacking fault energy (SFE). The results show that the enhanced mechanical stability of the 7Mn steel may be ascribed to the high stacking fault energy of the austenite in the 7Mn steel. Besides, the martensitic transformation occurs within a small strain range for the 5Mn steel, while for the 7Mn steel, the deformation-induced transformation occurs at applied strains higher than that for the 5Mn steel, and the initial nuclei of martensite are more numerous and more dispersed for the 7Mn steel. It follows that the differences in the deformation-induced phase transformation of these two steels may result in different of phase transformation induced plasticity (TRIP) effect and also lead to differences in their mechanical properties.

Key words： metallic materials medium-Mn steel crystal plasticity deformation-induced martensite transformation mechanical property

收稿日期: 2025-10-24

ZTFLH:

TG142

基金资助:国家自然科学基金(52301181)

通讯作者: 贾春妮，助理研究员，cnjia@imr.ac.cn，研究方向为人工智能驱动的钢铁材料设计；
王培，研究员，pwang@imr.ac.cn，研究方向为特殊钢材料设计与组织调控

Corresponding author: JIA Chunni, Tel: (024)83971973, E-mail: cnjia@imr.ac.cn;
WANG Pei, Tel: (024)83970106, E-mail: pwang@imr.ac.cn

作者简介: 邓智文，女，2000年生，硕士生

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表1 嵌入晶体塑性模型的等效相变系

$χ$	Fault-band system $m t w χ ⊗ n t w χ$
1	$[2 ¯ 11] ⊗ (111) / 18$
2	$[1 ¯ 2 1 ¯] ⊗ (111) / 18$
3	$[11 2 ¯] ⊗ (111) / 18$
4	$[2 ¯ 1 ¯ 1 ¯] ⊗ (1 ¯ 11) / 18$
5	$[12 1 ¯] ⊗ (1 ¯ 11) / 18$
6	$[1 ¯ 1 2 ¯] ⊗ (1 ¯ 11) / 18$
7	$[2 ¯ 1 ¯ 1] ⊗ (1 1 ¯ 1) / 18$
8	$[1 ¯ 12] ⊗ (1 1 ¯ 1) / 18$
9	$[2 1 ¯ 1] ⊗ (1 1 ¯ 1) / 18$
10	$[1 2 ¯ 1 ¯] ⊗ (11 1 ¯) / 18$
11	$[111] ⊗ (11 1 ¯) / 18$
12	$[1 ¯ 1 ¯ 2 ¯] ⊗ (11 1 ¯) / 18$

表2 fcc晶体结构的层错带系统

图1 晶体塑性本构模型的计算流程

图2 7Mn钢和5Mn钢的显微组织SEM照片

图3 7Mn钢和5Mn钢的拉伸性能

图4 使用不同尺寸和不同网格划分的RVE模型计算出的宏观应力-应变曲线

图5 基于7Mn钢和5Mn钢的组织建立的RVE模型

表3 奥氏体和铁素体相的弹性常数[34,35]

Deformation mechanism	Parameters	fcc	bcc	Units
Slip	Magnitude of Burgers vector for each slip system	$2.56 × 10 - 10$	$2.58 × 10 - 10$	m
	Activation energy for glide for each slip system	$3.0 × 10 - 19$	$2.5 × 10 - 19$	J
	Adjustment parameter p for slip	0.5	0.4
	Adjustment parameter q for slip	1.3	1.3
	Strength due to elements in solid solution	$6.5 × 108$	$2.8 × 108$	Pa
Transformation	Magnitude of Burgers vector for each transformation system	$1.47 × 10 - 10$	-	m
	Width of martensite nucleus	$1.27 × 10 - 7$	-	m
	Adjustment parameter for transformation	3.0	-
	Martensite lamellar thickness for each transformation system	$1.0 × 10 - 7$	-	m
	Stacking fault energy	10.0	-	mJ/m²

表4 用于晶体塑性计算的7Mn钢中奥氏体和铁素体的本构参数

图6 7Mn钢和5Mn钢的实验和计算的应力-应变曲线

表5 7Mn钢和5Mn钢中奥氏体和铁素体的Mn含量

图7 应变ε = 0.01、0.02和0.03时不同层错能模型的形变诱导相变演化云图

图8 图7中微区L1和L2的位错密度

图9 应变ε = 0.01, 0.02, 0.03时不同层错能模型的等效应力云图

图10 7Mn钢和5Mn钢中奥氏体的加工硬化率和相变动力学

图11 7Mn钢和5Mn钢的形变诱导相变云图

图12 7Mn钢和5Mn钢的等效应力云图

图13 7Mn钢和5Mn钢中单相的位错密度和应力-应变曲线以及位错密度云图

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