Selective laser melting of nano-TiN modified AlSi10Mg composite powder with low laser reflectivity

被引：52

作者：

Gao, Chaofeng ^{[1
]}

Xiao, Zhiyu ^{[1
]}

Liu, Zhongqiang ^{[1
]}

Zhu, Quanli ^{[1
]}

Zhang, Weiwen ^{[1
]}

机构：

[1] South China Univ Technol, Guangdong Key Lab Adv Metall Mat Proc, Natl Engn Res Ctr Near Net Shape Forming Metall M, 381 Wushan, Guangzhou 510640, Guangdong, Peoples R China

来源：

MATERIALS LETTERS | 2019年 / 236卷

基金：

中国国家自然科学基金;

关键词：

Selective laser melting; AlSi10Mg; Nanoparticles; Metallic composites; Microstructure; SINTERING/MELTING SLS/SLM; AL; MICROSTRUCTURE; NANOCOMPOSITES; REINFORCEMENT; VOLUME; ALLOY;

D O I：

10.1016/j.matlet.2018.10.126

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel ultrasonic vibration dispersion method was used to produce TiN nanopowder decorated TiN/AlSi10Mg composite powder. The promising selective laser melting (SLM) technique was then used to fabricated TiN/AlSi10Mg nanocomposites. It showed that the near-spherical composite powder surface was uniformly distributed with TiN nanopowder. The laser reflectivity of the composite powder was reduced from 62% to 25% compared to that of the original powder. The SLMed composite parts, with a uniform distribution of nano TiN reinforcing particles and well-bonded interfaces, could be successfully formed at a low laser power of 100 W. A few agglomerated TiN particles grew into micron-sized spherical clusters. With the addition of TiN, the microstructure was significantly refined, and the hardness of the samples increased from 126 HV0.1 to 145 HV0.1. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：362 / 365

页数：4

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