Journal Published Online: 29 November 2021
Volume 50, Issue 3

Study on the Creep-Fatigue Interaction Behavior of 1Cr11Ni2W2MoV Steel

CODEN: JTEVAB

Abstract

In order to investigate the creep-fatigue interaction of 1Cr11Ni2W2MoV steel, strain-controlled low-cycle fatigue tests were performed at various strain ranges with fully reversible cycle of triangular waveform at 500°C. In addition, different hold times were introduced at the maximum tensile strain to investigate the impact of creep damage on fatigue life. Fracture surfaces and axial section were evaluated in terms of crack growth behavior and propagation path. The creep-fatigue life decreased with increasing hold time. It was observed that cyclic softening effect intensified with tensile holding. Crack initiation and growth behavior changed in relation to hold time that exceeded 60 s at a strain range of 1.2 %, which led to premature failure. Under the present test conditions, a good description of fatigue life was provided by the model based on inelastic strain energy density.

Author Information

Liu, Lanzhou
Central Iron and Steel Research Institute, Beijing, China
Gao, Yifei
Central Iron and Steel Research Institute, Beijing, China NCS Testing Technology Co., Ltd., Analysis Center, Beijing, China
Niu, Tong
NCS Testing Technology Co., Ltd., Analysis Center, Beijing, China
Zhang, Zhiwei
NCS Testing Technology Co., Ltd., Analysis Center, Beijing, China
Wang, Yanjiang
NCS Testing Technology Co., Ltd., Analysis Center, Beijing, China
Chen, Xin
NCS Testing Technology Co., Ltd., Analysis Center, Beijing, China
Pages: 16
Price: $25.00
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Details
Stock #: JTE20210191
ISSN: 0090-3973
DOI: 10.1520/JTE20210191