Grain Refinement and Superplastic Behavior in a Commercial Bearing Steel
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概要
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An ultra-fine-grained SUJ-2 steel was obtained by applying one of thermomechanical processing routes developed in UHC-steel. This material showed the high elongation-to-failure values of 400-840% at warm temperature between 650°C and 730°C over a range of initial strain rates from 1×10-4 to 8×10-4sec-1. The value of m≅0.33 and the activation energy of 195kJ/mol was obtained for the deformation process in this range.From these results, it could be concluded that grain boundary sliding is not totally dominating the deformation process of the present material although superplastic flow plays an important role in the range of the present testing conditions.
- The Iron and Steel Institute of Japanの論文
The Iron and Steel Institute of Japan | 論文
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