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| Heredity and Evolution of Carbide and Oxide in Nickel-Based PM Superalloys and Their Effect on Microstructure-Properties |
| ZHANG Ying |
1. Central Iron & Steel Research Institute, Beijing 100081, China;
2. CISRI–Gaona Materials & Technology Co., Ltd., Beijing 100081, China |
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Abstract Due to its unique production process, powder metallurgy superalloy often produces defects such as inclusions, previous particle boundary (PPB) in the formed parts. In this paper, the heredity and evolution of carbide and oxide in alloy were traced back according to the manufacturing process of Ni–based powder metallurgy (PM) superalloy, and their effects on microstructure, crack growth rate and fatigue life of formed parts were analyzed. The schemes of restraining and eliminating defects were proposed.
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2021, 
