Creep-Fatigue Properties of Mod.9Cr-1Mo Steel Under Variable Straining

[+] Author and Article Information
M. Miyahara, K. Tokimasa

Iron & Steel Research Laboratories, Sumitomo Metal Industries, Ltd., Amagasaki 660, Japan

J. Pressure Vessel Technol 115(3), 235-241 (Aug 01, 1993) (7 pages) doi:10.1115/1.2929522 History: Received August 17, 1992; Revised February 26, 1993; Online June 17, 2008


Two-step variable straining tests, which included CP- (slow-fast) type and PC- (fast-slow) type tests, were conducted at 600°C in air for Mod.9Cr-1Mo steel. In the tests, CP and PC-type strain range level varied from high to low for the high-low test and from low to high for the low-high test. The deviations of the experimental data from the linear damage rule prediction were observed. These experimental results and the effect of the strain waveform on the creep-fatigue properties under variable straining were well explained by the life prediction model previously proposed by the authors in which the strain range partitioned crack growth rate equations were applied.

Copyright © 1993 by The American Society of Mechanical Engineers
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