Manufacturing Technology 2014, 14(4):637-643 | DOI: 10.21062/ujep/x.2014/a/1213-2489/MT/14/4/637

Study on Q245 Steel fatigue crack growth behaviors at high temperature

Haibo Wang1,2, Dongpo Wang1, Fangjie Cheng1,*, Caiyan Deng1, Yunlong Wu1
1 School of Materials Science and Engineering, Tianjin University, China. Weijin Rd, 92, Nankai, Tianjin 300072, China
2 Tianjin Special Equipment Inspection Institute, China. Hangtian Street, Nankai, Tianjin 300192, China

Q245 steel was once widely used in the pressure vessel industry.At present, the high temperature fatigue performance of Q245 steel was tested and analyzed. According to the relevant standards, the pre-crack specimens were tested at 25℃and400℃respectively. The a-N curves, the da / dN  K curves and the Paris formula of Q245 steelat both room temperature(25℃) and high temperature(400℃) were obtained. Finally,the high temperature fatigue fracture analysis was done.The fatigue crack growth occurredalong the grain at high temperature. A large number of acicular oxideappearin the fracture surface and the fatigue striations could notbe observed at high temperature.

Keywords: High temperature; Fatigue crack;Fatigue crack growth threshold

Published: December 1, 2014  Show citation

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Wang H, Wang D, Cheng F, Deng C, Wu Y. Study on Q245 Steel fatigue crack growth behaviors at high temperature. Manufacturing Technology. 2014;14(4):637-643. doi: 10.21062/ujep/x.2014/a/1213-2489/MT/14/4/637.
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