Characterization of tempered martensite embrittlement using hardness measurement |
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Authors: | A Ghosh A Bhaduri and K K Ray |
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Affiliation: | Department of Metallurgical Engineering, Indian Institute of Technology, Kharagpur, India-721 302 |
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Abstract: | A series of experiments were carried out on three commercial steels to explore the possibility for characterizing tempered martensite embrittlement (TME) by Rockwell, macro-, and micro-Vickers hardness tests. The results indicate distinct hardness peaks in two steels and an inflection in the other around the TME temperature. A new analytical approach for examining the slope of hardness-tempering temperature plots appears to reveal the TME phenomenon more sensitively. Dilatometric examinations substantiate that the temperature of hardness peak/inflection occurs beyond the second stage of tempering. |
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