Microstructural characteristics of laser surface melted MoSiBTiC alloy

被引：6
|
作者：
Higashi, Masaya [1 ]
Ozaki, Tomomichi [1 ]
Moronaga, Taku [2 ]
Hara, Toru [2 ]
Osada, Toshio [2 ]
Kawagishi, Kyoko [2 ]
机构：
[1] IHI Corp, Technol & Intelligence Integrat, Isogo Ku, 1 Shinnakahara Cho, Yokohama, Kanagawa 2358501, Japan
[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
来源：
MATERIALS LETTERS | 2020年 / 278卷 / 278期
关键词：
Selective laser melting; Mo-Si-B alloy; Lamellar structure; Heat affected zone; Atom probe; Electron microscopy; OXIDATION RESISTANCE; MO;
D O I：
10.1016/j.matlet.2020.128465
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural characteristics of a TiC-added Mo-Si-B (MoSiBTiC) alloy fabricated by laser surface melting were investigated. The microstructure inside a melt pool consisted of many cells, and each cell was composed of an ultrafine ternary eutectic lamellar structure with Mo solid solution (Mo-ss), Mo5SiB2, and (Mo,Ti)(2)C phases. The lamellar structure completely disappeared in a heat affected zone (HAZ) formed by multi tracks test, and a fine round (Ti,Mo)C phase newly precipitated in the HAZ together with other phases. The chemical composition analyses identified the elemental supersaturation of Si and Ti in the Mo-ss phase and of Ti in the T-2 phase in the lamellar structure. (C) 2020 Elsevier B.V. All rights reserved.
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页数：4
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