孪晶诱发塑性钢疲劳行为研究进展

Recent Research Progress on Fatigue Behavior of Twinning Induced Plasticity Steels

孪晶诱发塑性(TWIP)钢具有较高的强度和优越的塑性,已经应用在汽车零部件。在汽车行驶过程中,这些零部件将会承受交变载荷,存在发生疲劳断裂的风险。近年来,科研工作者越来越重视对TWIP钢疲劳行为的研究,希望通过弄清TWIP钢疲劳过程中的微观组织演化、裂纹扩展方式以及影响疲劳寿命的因素,来进一步提升TWIP钢的抗疲劳能力。从TWIP钢的高周疲劳、低周疲劳和疲劳裂纹扩展3个方面总结了TWIP钢疲劳行为研究的近期成果,并对每种疲劳行为背后的组织演化以及强化方式进行了总结分析。

Twin induced plasticity(TWIP)steels have high strength and superior plasticity and have been used in automotive parts.In the process of vehicle running,these parts will be subjected to alternating loads,there is a risk of fatigue fracture.In recent years,researchers have paid more and more attention to the study of fatigue behavior of TWIP steel,hoping to further improve the fatigue resistance of TWIP steel by understanding the microstructure evolution of TWIP steel during fatigue process,the mode of crack propagation and the factors affecting fatigue life.The recent research results of fatigue behavior of TWIP steel were summarized from three aspects of high cycle fatigue,low cycle fatigue and fatigue crack propagation,and the microstructure evolution and strengthening mode behind each fatigue behavior were summarized and analyzed.