Transactions of Materials and Heat Treatment

Title：Postdynamic softening behavior of nickelbase corrosion resistant alloy G3

Authors： WANG Jue DONG Jian-xin ZHANG Mai-cang ZHENG Lei

Unit： University of Science and Technology Beijing

KeyWords： nickelbase corrosion resistant G3 alloy postdynamic recrystallization softening rate kinetics

ClassificationCode：TG302;TG146.2

year,vol(issue):pagenumber：2012,37(2):143-147

Abstract：

In order to investigate the post-dynamic softening behavior of nickel-base corrosion resistant alloy G3, three types of hot compression: single-hit with deformation of 15% and 60%, double-hit with deformation of 15%+15%, single-hit with 15% deformation followed by various holding time were carried out over the temperature range of 1100 to 1200℃, and at the strain rates of 0.1, 1 and 10s-1. The results show that dynamic recrystallization occurs when G3 alloy is compressed with deformation of 15%. Post-dynamic softening is observed during the holding time after deformation, which is governed by meta-dynamic and conventional static recrystallization concurrently. The kinetics of post-dynamic softening for G3 alloy is influenced by strain rate. However, with the same strain, the final softening rate is decided by temperature only. The homogeneity of microstructure after post-dynamic recrystallization is worse than that of dynamic recrystallization after 60% compression.

Funds：

国家自然科学基金资助项目（50831008）

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