孪生诱发塑性钢拉伸与疲劳性能及变形机制
收稿日期: 2019-11-14
修回日期: 2020-01-06
网络出版日期: 2020-01-07
基金资助
国家自然科学基金项目(51801216);国家自然科学基金项目(51771208);国家自然科学基金项目(U1664253)
Tensile and Fatigue Properties and Deformation Mechanisms of Twinning-Induced Plasticity Steels
Received date: 2019-11-14
Revised date: 2020-01-06
Online published: 2020-01-07
Supported by
National Natural Science Foundation of China(51801216);National Natural Science Foundation of China(51771208);National Natural Science Foundation of China(U1664253)
随着汽车工业的高速发展，以开发先进高强钢为重点的车辆轻量化设计已经成为各大汽车厂商的发展共识。本文基于国内外孪生诱发塑性(TWIP)钢强韧性和抗疲劳设计的成果以及本课题组多年来在该领域的研究工作，系统地总结了TWIP钢的研究现状及最新进展，探讨了影响TWIP钢拉伸性能与变形机制的影响因素，包括合金成分、组织状态、应变速率等。重点介绍TWIP钢的高、低周疲劳性能和微观损伤行为，并提出一种客观评价和预测低周疲劳寿命的方法。从TWIP钢的服役环境和实际应用角度出发，试图为新一代高性能TWIP钢的开发提供新的思路和实验证据。
张哲峰 , 邵琛玮 , 王斌 , 杨浩坤 , 董福元 , 刘睿 , 张振军 , 张鹏 . 孪生诱发塑性钢拉伸与疲劳性能及变形机制[J]. 金属学报, 2020 , 56(4) : 476 -486 . DOI: 10.11900/0412.1961.2019.00389
With the development of automotive industry, it is necessary to develop advanced high-strength steels for the purpose of lightweight of car. Based on the systematic studies on the strengthening and toughening as well as fatigue design of the twinning-induced plasticity (TWIP) steels, the recent progress in this aspect is summarized and discussed. Among them, the strengthening and toughening mechanisms have been analyzed and further developed in terms of several influencing factors, including compositions, microstructure, strain rate and so on. Furthermore, the low-cycle and high-cycle fatigue behaviors and damage mechanisms were explored. For better understanding the intrinsic fatigue damage mechanism, a new low-cycle fatigue prediction model regarding the hysteresis loop energy during cyclic deformation was introduced. It is found that the energy damage model can well explain and evaluate the fatigue damage mechanism and predict the low-cycle fatigue life of the TWIP steels and other materials. Based on the new fatigue damage model, new TWIP steels with high service performance can be developed by adjusting their deformation and damage mechanisms rationally.
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