A multi-scale multi-physics modeling framework of laser powder bed fusion additive manufacturing process

被引：16

作者：

Zhang J. ^{[1
]}

Zhang Y. ^{[1
]}

Lee W.H. ^{[1
]}

Wu L. ^{[1
]}

Choi H.-H. ^{[2
]}

Jung Y.-G. ^{[2
]}

机构：

[1] Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, 46202, IN

[2] School of Materials Science and Engineering, Changwon National University, Changwon, 641-773, Gyeongnam

来源：

Zhang, Jing (jz29@iupui.edu) | 2018年 / Elsevier Ltd卷 / 73期

关键词：

Sintering - Powder metals - Laser heating - Additives;

D O I：

10.1016/j.mprp.2018.01.003

中图分类号：

学科分类号：

摘要：

A longstanding challenge is to optimize additive manufacturing (AM) process in order to reduce AM component failure due to excessive distortion and cracking. To address this challenge, a multi-scale physics-based modeling framework is presented to understand the interrelationship between AM processing parameters and resulting properties. In particular, a multi-scale approach, spanning from atomic, particle, to component levels, is employed. The simulations of sintered material show that sintered particles have lower mechanical strengths than the bulk metal because of their porous structures. Higher heating rate leads to a higher mechanical strength due to accelerated sintering rates. The average temperature in the powder bed increases with higher laser power. The predicted distortion due to residual stress in the AM fabricated component is in good agreement with experimental measurements. In summary, the model framework provides a design tool to optimize the metal powder based additive manufacturing process. © 2018 Elsevier Ltd

引用

页码：151 / 157

页数：6

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