Research on High Temperature Low Cycle Fatigue Crack Propagation of 2.25Cr-lMo Steel under Complex Stress State

Abstract:

The crack propagation law of 2.25Cr-1Mo steel with notched cylinder was researched under high temperature low cycle fatigue. The crack propagation life was viewed by fatigue experiment and the equivalent stress-strain on the crack tip was calculated by the ANSYS. The equivalent J-integral range which was computed by equivalent elastic and plastic strain ranges were employed to denote the fatigue crack propagation rate. The results showed that crack propagation law of this material under complex stress state can be characterized by equivalent J-integral ranges and the relation between da/dN and ΔJf is not influenced by the type of notch and the load strain range.

• Periodical: Advanced Materials Research (Volumes 361-363)
• Pages: 1422-1425
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.361-363.1422
• Online since: October 2011
• Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
• Keywords: 2.25Cr-1Mo, Crack Propagation, Equivalent, J-Integral Ranges, Low Cycle Fatigue

References

[1] Hongsheng Li, Chengfang Zhou: Engineering Fracture Mechanics (Dalian University of Technology Press, 1990)

[2] Ren Wang, Zhuhua Xiong, Wenbin Huang: The basis of plasticity (Science Press, 1982)

[3] Ryjichi Ohtani, Comai Cangirou. Environment and high temperature strength (Tokyo Ohm Press, 1984)

[4] Chengbi Guo, Wenxiao Zhang, Hongfa Huang, Shali Liang and Hua Ni: submitted to Journal of Dalian University of Technology (1996)

[5] Dingyun Hu, Ming Pang, Jianping Wang and Bo Wu: submitted to Machinery Design ＆ Manufacture (2010)

[6] Maillot V, Fismlo A: submitted to International Journal of solids and Structures (2005)