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| Effect of Heat Treatments on Fatigue Properties of FV520B Steel Using Infrared Thermography |
| FAN Junling1, GUO Xinglin1, WU Chengwei1, DENG Dewei2 |
1.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024
2.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024 |
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Cite this article:
FAN Junling GUO Xinglin WU Chengwei DENG Dewei. Effect of Heat Treatments on Fatigue Properties of FV520B Steel Using Infrared Thermography. Chin J Mater Res, 2012, 26(1): 61-67.
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Abstract The effects of heat treatments on microstructures and mechanical properties of FV520B stainless steel were investigated. The infrared thermographic method (TM) was used to monitor the external temperature of specimens subjected to fatigue loading in order to fast determine fatigue strengths of the virgin and heat-treated FV520B steels. The relationship between the surface temperature and internal microstructures are closely linked to analyze the damage status for safety evaluation. The metallographic investigation shows that the improvement of mechanical properties of FV520B steel can be attributed to the formation of tempered martensite and secondary phase particles uniformly distributed in the matrix. The fatigue microcracks initiate from the favorably oriented grains at the corner of the specimen surface.
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Received: 06 July 2011
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| Fund: Supported by Natural National Science Foundation of China No.11072045 and National Key Basic Research and Development Program of China No.2011CB706504. |
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