Transient behavior of creep crack growth under non-steady loading
The loading condition that a high temperature component is subjected to in service may vary with time. Crack growth behavior under non-steady load has not been studied significantly. This paper discusses some observations on transient crack growth behavior in 12％ Cr steel X20 under step loading and ramp loading. Step loading tests included step-up tests and step-down tests. Ramp loading comprises of linear ramping up to a higher load and down to a lower load. Creep crack growth tests are performed at 545℃ using 1/2T CT specimens. The crack growth process is analyzed using ABACUS to examine the transient crack tip field. Transient aspects of crack growth are discussed in comparison with crack growth under constant load.
Creep crack growth X20 steel Non-steady load C<*>(t)
K. S. Kim W. S. Yoon
Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, S. Korea Kefico Corporation, Goonpo-si, Gyeunggi-do, S. Korea
国际会议
国际断裂力学2007年会(Fracture Mechanics and Applications 2007)
长沙
英文
31-34
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）