Microstructural Investigation of Inconel718 Manufactured by SLM

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Feng, Shengnan^1 ; Gong, J.H.^1 ; Li, Huixiang^1 ; Wang, Haoran^1

School of Mechanical and Electrical Engineering, Shandong University, Weihai, China^1

关键词: Annealing twins;    Columnar grain;    Equiaxed crystal;    Inconel 718 alloy;    Inconel-718;    Microstructural investigation;    Selective laser melting (SLM);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/2/022088/pdf
DOI  :  10.1088/1757-899X/452/2/022088

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Selective laser melting (SLM) Inconel718 alloys were heat treated at two different temperatures. The as-built samples, HT950 samples, and HT1050 samples were observed by light microscopy and scanning electron microscopy, and the hardness of these samples were tested. It was found that the microstructure of Inconel 718 alloy produced by SLM was squama-like. Columnar grains appeared after HT950 treatment, and the hardness was 80% higher than that of As-built sample. Equiaxed crystal and annealing twins appeared after HT1050 treatment, and the hardness increased by 44%.