Direct laser deposition of in situ Ti-6Al-4V-TiB composites

被引：131

作者：

Banerjee, R ^{[1
]}

Collins, PC ^{[1
]}

Genç, A ^{[1
]}

Fraser, HL ^{[1
]}

机构：

[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 358卷 / 1-2期

关键词：

laser deposition; Ti-6Al-4V-TiB; LENS (TM);

D O I：

10.1016/S0921-5093(03)00299-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Ti-6Al-4V-TiB composites have been in situ deposited from powder feedstocks consisting of a blend of pre-alloyed Ti-6Al-4V and elemental boron using the Laser Engineered Net-Shaping (LENS(TM)) process. The microstructure of the as-deposited composites has been characterized in detail using scanning (SEM) and transmission electron microscopy (TEM). A homogeneous refined dispersion of TiB precipitates is formed within the Ti-6Al-4V alpha/beta matrix. The scale of the microstructure is substantially refined as compared with composites produced using other recently developed powder processing techniques. In addition to the refined dispersion of the reinforcing phase, the influence of the TiB precipitation on the solid-state beta --> beta + alpha transformation that takes place in the matrix has been examined using SEM and TEM. Finally, heat-treatments carried out post-LENS(TM) deposition, suggest that LENS(TM) fabricated composites are thermodynamically stable, exhibiting limited TiB coarsening. (C) 2003 Published by Elsevier Science B.V.

引用

页码：343 / 349

页数：7

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