Effect of heat treatment on microstructure and mechanical properties of GH4099 superalloy fabricated by selective laser melting

被引：27
|
作者：
Chang, Kai [1 ,2 ]
Ma, Liang [1 ,2 ]
Li, Pengting [1 ,2 ]
Lv, Jun [3 ]
You, Xiaogang [1 ,2 ]
Zhang, Yingwei [4 ]
Tan, Yi [1 ,2 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Mat Modificat Laser, Ion & Electron Beams, Dalian 116024, Peoples R China
[2] Key Lab Energy Beam Met & Adv Mat Preparat Liaonin, Dalian 116024, Peoples R China
[3] Dalian Univ Technol, Sch Aeronaut & Astronaut, Dalian 116024, Peoples R China
[4] TSC Laser Technol Dev Beijing Co Ltd, Beijing 102206, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 934卷
基金：
中国国家自然科学基金;
关键词：
GH4099; Selective laser melting; Heat treatment; ? phase; Mechanical properties; RESIDUAL-STRESS; GH99; SUPERALLOY; EVOLUTION; STRENGTH; TEXTURE; ALLOY;
D O I：
10.1016/j.jallcom.2022.167813
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：
In this study, the effect of heat treatment on the microstructures and mechanical properties of GH4099 superalloy fabricated by selective laser melting (SLM) was investigated. The microstructures of the as -deposited sample mainly consisted of epitaxial growth columnar grains, and the formation of gamma-gamma ' eutectic phase was inhibited. After solution treatment, the molten pool boundaries and dendritic morphology in the as-deposited sample disappeared, and the dislocation density decreased apparently. The gamma ' phase with size of approximately 10 nm precipitated in the matrix after aging treatment; thus, the tensile properties were improved. In addition, the corresponding relationship between the microstructures and yield strength of the SLM GH4099 superalloy was revealed, which would help to quantitatively evaluate the mechanical properties of alloys with different microstructures.(c) 2022 Elsevier B.V. All rights reserved.
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页数：13
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