Selective Laser Melting of Metal Powders in Additive Manufacturing

Csung-Ho Liu,Chuan-Sheng Chuang,De-Yau Lin,Jinn-Kuen Chen,Tsung-Wen Tsai,Wai-Kwuen Choong,Wei-Chin Huang

doi:10.11159/jffhmt.2019.003

Abstract

Selective Laser Melting of Metal Powders in Additive Manufacturing

Highlights

Additive manufacturing (AM) has become a critical technology in many industry sectors, in the past decade [1,2,3,4]
In the numerical analysis, the parameters of material and laser beam are the same as those used in the experiment
The simulations of the crosssection shapes of the re-solidified parts by a single line laser scanning and the heights of a single layer by adjacent line-by-line laser scanning are compared with the experimental measurements for Ti6Al4V powders

Summary

Introduction

Additive manufacturing (AM) has become a critical technology in many industry sectors, in the past decade [1,2,3,4]. For most of AM processes of metal powders, selective laser melting (SLM) plays an important role in building complex-shaped parts by selectively melting powders layer-by-layer. Each time of laser scanning, those powders in the powder bed are selectively heated and melted, the melt flows, coalesces, and forms a narrow melt track. After the laser beam moves away, the localized melt pool rapidly cools down and re-solidifies. The consolidation of the melted part of metal powders forms a solid layer. A 3D part can be fabricated by continuously feeding of powders layer by layer with the SLM in an intended AM process. The quality of an AM product strongly depends on material, powder arrangement, laser processing parameters, and scanning scheme

Methods

Results

Conclusion