期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 25, 期 11, 页码 4959-4966出版社
SPRINGER
DOI: 10.1007/s11665-016-2359-y
关键词
dynamic tension; railway wheel steel; SHTB; strain rate
资金
- National Natural Science Foundation of China [51475392]
- Fundamental Research Funds for the Central Universities [2682015RC09]
- Research Fund of State Key Laboratory of Traction Power [2015TPL_T02]
The dynamic tensile tests on D1 railway wheel steel at high strain rates were conducted using a split Hopkinson tensile bar (SHTB) apparatus, compared to quasi-static tests. Three different types of specimens, which were machined from three different positions (i.e., the rim, web and hub) of a railway wheel, were prepared and examined. The rim specimens were checked to have a higher yield stress and ultimate tensile strength than those web and hub specimens under both quasi-static and dynamic loadings, and the railway wheel steel was demonstrated to be strain rate dependent in dynamic tension. The dynamic tensile fracture surfaces of all the wheel steel specimens are cup-cone-shaped morphology on a macroscopic scale and with the quasi-ductile fracture features on the microscopic scale.
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