Effect of Laser Melting Deposition Process on Microstructure and Property for FGH96
LIU Shuai, ZHANG Xue, YU Haixin , LIU Changsheng
Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Nickle-based powder superalloy FGH96 is regarded as one of ideal choices for the high-property turbine disk in an aero engine. In this paper, the FGH96 was laser melting deposited in four different scanning modes respectively. The purpose of this research is mainly to find out the effects of different scanning modes on microstructure, mechanical properties during laser deposited process. The results are shown as followed. The microstructure morphology of deposited layers is mainly epitaxially grown columnar crystal. Cracks are found in parallel scanning modes while none in zig-zag scanning mode. The main phases in samples are solid solutions, Laves phase and carbides. Sample made by parallel zig-zag mode with the same direction between layers has larger microhardness and the average is 389.3HV0.2. Its tensile strength is 1065.29MPa and the elongation is 28.17%. It has excellent mechanical properties and the fracture features of ductile fracture.
基金资助:NSFC– 辽宁联合基金（U1508213）。
作者简介: 刘帅：博士研究生，主要研究方向为激光快速成形镍基高温合金。
引用本文:
刘帅，张雪，于海鑫，刘常升. FGH96激光熔化沉积成形过程对组织与性能的影响[J]. 航空制造技术, 2019, 62(1/2): 72-79.
LIU Shuai, ZHANG Xue, YU Haixin,LIU Changsheng. Effect of Laser Melting Deposition Process on Microstructure and Property for FGH96. Aeronautical Manufacturing Technology, 2019, 62(1/2): 72-79.
2019, 
