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孟立春*,李晓东,孙晓红,吴思佚.织构对两种轨道车辆用钢力学性能的影响研究[J].实验力学,2018,33(5):790~798
织构对两种轨道车辆用钢力学性能的影响研究
Study of texture effect on mechanical propertiesof two kinds of steel for railway vehicle
投稿时间: 2017-08-10  最后修改时间: 2017-09-26
DOI:10.7520/1001-4888-17-162
中文关键词:  车辆用钢  准静态拉伸  各向异性  织构
英文关键词:railway vehicle steel  quasi-static tension  anisotropy  texture
基金项目:
作者单位
孟立春* 中车青岛四方机车车辆股份有限公司, 山东青岛 266111 
李晓东 1.中车青岛四方机车车辆股份有限公司, 山东青岛 266111 2.材料科学与工程学院上海交通大学上海 200240 
孙晓红 中车青岛四方机车车辆股份有限公司, 山东青岛 266111 
吴思佚 教育部先进材料与技术重点实验室, 西南交通大学, 四川成都 630031 
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中文摘要:
      轨道车辆在实际服役过程中会经受复杂的应力状态和环境条件。为获取轨道车辆用钢的准确本构关系,首先必须对材料不同方向的力学性能进行系统研究。本文对两种常用的车辆用钢Q345C和SUS304板材进行准静态单轴拉伸测试,发现两种板材在轧制面内的力学性能(主要是屈服强度和抗拉强度)有明显各向异性。为了获取材料宏观力学性能差异性的微观机理,利用电子背散射衍射技术(EBSD)对初始和回收试样进行了微结构表征。通过对材料加载前后的织构演化进行量化分析,发现主要是初始轧制织构导致了这两种板材宏观力学性能的各向异性。
英文摘要:
      Railway vehicles will undergo complex stress state and harsh environmental condition during real service process. In order to obtain the accurate constitutive relation of steel for railway vehicle, first of all, the mechanical properties of material in different directions must be studied systematically. In this paper, Q345C and SUS304 steel plate, which are two kinds of commonly used steel for railway vehicle, were tested by quasi-static uniaxial tension. It is found that the mechanical properties (mainly yield strength and tensile strength) of two kinds of plate present obvious anisotropy in rolling plane. In order to obtain the microscopic mechanism to explain the difference of macroscopic mechanical properties, the microstructure of initial and recovered specimens was characterized by using electron backscatter diffraction (EBSD). Through quantitative analysis of the texture evolution before and after loading, it is found that the texture caused by initial rolling leads to the anisotropy of macroscopical mechanical properties of the two plates.
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