Effect of scanning interval on microstructure of IN718 alloy formed by SLM

doi:10.13251/j.issn.0254-6051.2021.10.022

Abstract

Abstract: IN718 alloy was prepared byusing selective laser melting(SLM) technology, and the compactness, phase composition, grain morphology and orientation of IN718 alloy was analyzed by means of X-ray microscope, X-ray diffractometer, scanning electron microscope and electron backscattered diffraction techniques. The results show that the phaseof the IN718 alloy formed by SLM is composed of face-centered cubic structure γ-Ni phase and body-centered tetragonal γ″ phase, and columnar crystal grains formed along building direction. When the laser scanning interval is 100 μm, the density of the alloy reaches the highest. When the laser scanning interval is 90 μm, a strong <001> texture is formed along the building direction

Key words: selective laser melting, IN718 alloy, scanning interval, compactness, microstructure

CLC Number:

TG146

Zheng Junnan, Jin Tounan, Fang Xiaoying, Ma Tiejun, Li Wei. Effect of scanning interval on microstructure of IN718 alloy formed by SLM[J]. Heat Treatment of Metals, 2021, 46(10): 127-132.

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