The combined effect of frequency and load level on fatigue crack growth in stainless steel 304
The combined effect of frequency and load level on fatigue crack growth in stainless steel 304
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DOI：
10.1016/s0142-1123(00)00109-2
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发表时间：
2001-05-01
影响因子：
6
通讯作者：
Kim, KS
中科院分区：
文献类型：
--
作者：
Baik, YM;Kim, KS
研究了 304 不锈钢在 538 ℃ 下的裂纹扩展行为。 50 mm 宽、12.5 mm 厚的紧凑拉伸试样在 R=0.05 载荷控制下承受疲劳载荷。检查了频率（0.05 Hz 小于或等于至小于或等于 10 Hz）和载荷水平（6 kN 小于或等于 P(max) 小于或等于 16 kN）对裂纹扩展速率的综合影响。结果表明，参数 DeltaK 和 DeltaJ 与裂纹扩展速率具有相当好的相关性。建议使用两个 (f-P-max) 域，其中每个域中的裂纹扩展都可以通过单个 da/dN-DeltaK 方程来表征。对于 DeltaK25 MPa rootm，发现 f x P-max 值越大，裂纹扩展速率越高。在所有测试条件下，裂纹扩展的模式都是穿晶的。 (C) 2001 年，爱思唯尔科学有限公司出版。
The crack growth behavior in stainless steel 304 was investigated at 538 degreesC. Compact tension specimens, 50 mm wide and 12.5 mm thick, were subjected to fatigue loading under R=0.05 load control. The combined effect of frequency (0.05 Hz less than or equal tof less than or equal to 10 Hz) and load level (6 kN less than or equal toP(max)less than or equal to 16 kN) on the crack growth rate was examined. Parameters DeltaK and DeltaJ were shown to correlate crack growth rates reasonably well. Two (f-P-max) domains were suggested, in each of which crack growth can be characterized by a single da/dN-DeltaK equation. For DeltaK25 MPa rootm, crack growth rates were found higher for larger values of f x P-max. The mode of crack growth was transgranular for all test conditions. (C) 2001 Published by Elsevier Science Ltd.