Effects of laser modes on Nb segregation and Laves phase formation during laser additive manufacturing of nickel-based superalloy

被引：135

作者：

Xiao, H. ^{[1
,2
]}

Li, S. M. ^{[1
,2
]}

Xiao, W. J. ^{[1
,2
]}

Li, Y. Q. ^{[1
,2
]}

Cha, L. M. ^{[2
]}

Mazumder, J. ^{[3
]}

Song, L. J. ^{[1
,2
]}

机构：

[1] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China

[2] Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Hunan, Peoples R China

[3] Univ Michigan, Ctr Laser Aided Intelligent Mfg, Ann Arbor, MI 48109 USA

来源：

MATERIALS LETTERS | 2017年 / 188卷

基金：

中国国家自然科学基金;

关键词：

Deposition; Segregation; Laves phases; Laser additive manufacturing; INCONEL; 718; MICROSTRUCTURE; DEPOSITION;

D O I：

10.1016/j.matlet.2016.10.118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nb-bearing nickel-based superalloys were fabricated by laser additive manufacturing using both continuous wave (CW) and quasi-continuous-wave (QCW) laser modes. Effects of laser modes on Nb segregation and Laves phase morphology were investigated. The responses to aging treatments of two different fabricated samples were also investigated. CW mode tends to develop columnar dendrites, relative severe Nb segregation and continuous distributed Laves phase, while QCW mode tends to produce fine equiaxed dendrites, less Nb segregations and fine discrete Laves phase. In addition, the QCW sample responses better to aging treatment than the CW sample.

引用

页码：260 / 262

页数：3

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