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Studies on thermal fatigue in 3Cr2W8V die steel by positron lifetime and hardness measurements |
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| Authors: | C. Q. Tang G. Y. Li Z. H. Shi X. Z. Li B. T. Yao |
| Affiliation: | a Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China b Department of Mechanical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P.R. China |
| Abstract: | Studies on thermal fatigue in 3Cr2W8V die steel have been carried out by using positron lifetime and microhardness measurements. It is found that the mean positron lifetime and the microhardness exhibit periodic up-and-down variations with an increase in the number of fatigue cycles. The experiments indicate that in the process of thermal fatigue there are two opposing effects on variation of defects: microdeformation and dynamic recovery and recrystallization. |
| Keywords: | thermal fatigue die steel positron lifetime microhardness |
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