Influence of powder characteristics on microstructure and mechanical properties of Inconel 718 superalloy manufactured by direct energy deposition

被引：20
|
作者：
Wang, Zhen [1 ]
Wang, Jiang [1 ,2 ]
Xu, Shurong [1 ]
Liu, Bo [1 ]
Sui, Qingxuan [1 ]
Zhao, Fengjun [1 ]
Gong, Le [1 ]
Liu, Jun [1 ]
机构：
[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[2] State Key Lab Nickel & Cobalt Resources Comprehen, Jinchang 737100, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2022年 / 583卷
基金：
中国国家自然科学基金;
关键词：
Inconel; 718; Gas atomization; Plasma rotating electrode process; Direct energy deposition; Printed part properties; BEHAVIOR; WIRE; GAS;
D O I：
10.1016/j.apsusc.2022.152545
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This work reports a study of the differences between properties of gas atomized (GA) and plasma rotating electrode processed (PREP) Inconel 718 powder and their printed parts. Powder morphology, particle size distribution, chemical composition, flowability and density have been comprehensively analyzed. From that, it can be found the properties of PREP powder were better than GA powder. The densification, microstructure, mechanical properties, and oxidation resistance of GA and PREP samples prepared by direct energy deposition(DED) were also studied. The results showed that the perfect morphology of powder could contribute to a finer microstruture and a more obvious preferential orientation of the printed part. Moreover, the density, mechanical properties and oxidation resistance of the printed parts were all better. This work highlights that properties of powder are crucial to the properties of the printed parts, and emphasises the importance of powder morphology on energy absorption, microstructure and preferential orientation in DED process.
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收藏
页数：13
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