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| 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 |
| Received:August 10, 2017 Revised:September 26, 2017 |
| 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: |
| Author Name | Affiliation | | MENG Li-chun* | CRRC Qingdao Sifang CO., LTD, Qingdao 266111, Shandong, China | | LI Xiao-dong | 1.CRRC Qingdao Sifang CO., LTD, Qingdao 266111, Shandong, China
2.Department of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China | | SUN Xiao-hong | CRRC Qingdao Sifang CO., LTD, Qingdao 266111, Shandong, China | | WU Si-yi | Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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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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