Transactions of Materials and Heat Treatment

Title：Study on hot deformation behavior of a Ni-Co-based superalloy

Authors：

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KeyWords：

ClassificationCode：TG132.3

year,vol(issue):pagenumber：2024,49(7):57-63

Abstract：

Hot compression tests were conducted on Ni-Co-based superalloy after homogenizing heat treatment by thermal simulation test machine, and based on the test results, the rheology behavior of the alloy under different deformation temperatures and strain rates was investigated. Then, the constitutive equation and hot processing maps for hot compression of Ni-Co-based superalloy were established, and the microstructure after hot compression deformation was analyzed by the electron back-scattered diffraction technique. The research esults show that the rheology stress of Ni-Co-based superalloy increases with the decreasing of deformation temperature and the increasing of strain rate. Within the investigated deformation temperature range and strain rate conditions in this study, no instability phenomena occurs in the alloy (instability factor is greater than 0). The recrystallization fraction of the alloy increases with the increasing of power dissipation rate, and it is significantly affected by temperature.

Funds：

国家自然科学基金资助项目(52175306)

作者简介：朱强(1990-)，男，博士，副教授 E-mail：zhuqiang@hit.edu.cn 通信作者：张鹏(1978-)，男，博士，教授 E-mail：pzhang@hit.edu.cn

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