Quasi-static hot deformation behavior of a novel third-generation Ni-based powder metallurgy superalloy

Author:

Wang YL1ORCID,Li Y1,Zhang H1,Yang JL12,Ma XD1,Chen Q1,Guo JZ12

Affiliation:

1. Shenzhen Wedge Central South Research Institute Co., Ltd, Shenzhen, China

2. Powder Metallurgy Research Institute, Central South University, Changsha, China

Abstract

Quasi-static hot deformation behavior of a novel third-generation Ni-based powder metallurgy superalloy A3 was investigated by hot compression tests and microscopy. The activation energy for hot working of the experimental alloy was about 867 kJ/mol. An instability domain existed in the processing map when the strain was 0.2, implying a plastic instability at the temperature range of 1080–1100°C and the strain rate range of 0.016–0.1 s−1. The power dissipation efficiency in processing maps indicated that optimum parameters for large deformation could be controlled at the temperature range of 1000–1030°C and the strain rate range of 0.001–0.01 s−1. It provided a reliable suggestion for hot processing during the manufacturing of such superalloy.

Funder

National Science and Technology Major Project

Key Area Research and Development Program of Guangdong Province

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

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