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Effect of solution treatment on the hot workability of electroslag remelted Ni−Cr−Mo alloy

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Abstract

The effect of solution treatment on the hot workability of electroslag remelted Ni−Cr−Mo alloy was evaluated. Tensile tests were performed in the temperature range of 950 to 1200°C at a strain rate of 6.1/sec. The hot workability of this alloy appeared to be intimately dependent on the amount of precipitates that were identified as the P phase. A solution treatment at 1250°C for 2 hours induced a considerable dissolution of the precipitates. It resulted in a significant improvement in the hot workability (from 40% to 70% in RA value), giving the deformation mechanism for grain boundary sliding at below 1000°C and dynamic recrystallization at above 1100°C. The hot ductility drop at around 1050°C could be attributed to the precipitates reprecipitated especially at the grain boundary before deformation.

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Authors and Affiliations

  1. Atomic Energy Materials Technology Development Team, Korea Atomic Energy Research Institute, Yuseong-ku, P.O. Box 105, 305-600, Daejeon, Korea

    Tae-Kyu Kim, Jinsung Jang & Jun-Hwa Hong

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  1. Tae-Kyu Kim
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  2. Jinsung Jang
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  3. Jun-Hwa Hong
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Kim, TK., Jang, J. & Hong, JH. Effect of solution treatment on the hot workability of electroslag remelted Ni−Cr−Mo alloy. Met. Mater. Int. 8, 45–51 (2002). https://doi.org/10.1007/BF03027027

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