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Isothermal hot compression tests on the as-cast high-Cr ultra-super-critical rotor steel with columnar grains were carried out in the temperature range from 1223 to 1523 K and at strain rates from 0.001 to 1 s–1. The compression direction was parallel to the longitudinal direction of columnar grains. The constitutive equation based on Arrhenius model was presented, and the processing maps based on...
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