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Fatigue Behavior of AAR (Association of American Railroads) Class A Railroad Wheel Steel at Ambient and Elevated Temperatures. Final rept.
| 题名： | Fatigue Behavior of AAR (Association of American Railroads) Class A Railroad Wheel Steel at Ambient and Elevated Temperatures. Final rept. |
| 作者： | McMaster-F.J.; Robledo-G.B. |
| 关键词： | *Test-program; *Material-properties; *Ambient-temperatures; *Elevated-temperatures; *Fatigue-behavior.;Wheel-steel; Fatigue-tests; Chemical-composition; Tensile-properties. |
| 摘要： | This report documents a test program to determine the material properties (chemical composition, tensile, and fatigue) at ambient and elevated temperatures of a Class A wheel steel as designated by the Association of American Railroads. The 3 temperatures examined included ambient room temperature, 500 degrees F, and 1000 degrees F. The fatigue properties determined at ambient temperature are required to address rail vehicle wheels equipped with disc brakes, which are not exposed to frictional heating during stop-braking. Researchers performed fatigue testing to determine the S-N curves at each of the three temperatures. Furthermore, the research team performed a large number of fatigue tests at R-ratios of -1.0 and 0.05 for each of the test temperatures to enable reliable estimates of the Sines parameters, A and a. |
| 报告类型： | 科技报告 |
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