Characterization of titanium aluminide alloy components fabricated by additive manufacturing using electron beam melting

被引：390

作者：

Murr, L. E. ^{[1
,2
]}

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

Ceylan, A. ^{[1
]}

Martinez, E. ^{[1
,2
]}

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

Hernandez, D. H. ^{[1
,2
]}

Machado, B. I. ^{[1
,2
]}

Ramirez, D. A. ^{[1
]}

Medina, F. ^{[2
]}

Collins, S. ^{[3
]}

Wicker, R. B. ^{[2
,4
]}

机构：

[1] Univ Texas El Paso, Dept Met & Mat Engn, El Paso, TX 79968 USA

[2] Univ Texas El Paso, WM Keck Ctr Innovat 3D, El Paso, TX 79968 USA

[3] Addit Mfg Proc, Camarillo, CA 93012 USA

[4] Univ Texas El Paso, Dept Mech Engn, El Paso, TX 79968 USA

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 05期

关键词：

Electron beam methods; Titanium aluminides; SEM; TEM; XRD;

D O I：

10.1016/j.actamat.2009.11.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Intermetallic, gamma-TiAl, equiaxed, strian-grain (similar to 2 mu m) structures with lamellar gamma/alpha(2)-Ti3Al colonies with average spacing of 0.6 mu m have been fabricated by additive manufacturing using electron beam melting (EBM) of precursor, atomized powder. The residual microindentation (Vickers) hardness (HV) averaged 4.1 GPa, corresponding to a nominal yield strength of similar to 1.4 GPa (similar to HV/3), and a specific yield strength of 0.37 GPa cm(3) g(-1) (for a density of 3.76 g cm(-3)), in contrast to 0.27 GPa cm(3) g(-1) for EBM-fabricated Ti-6Al-4V components. These results demonstrate the potential to fabricate near net shape and complex titanium aluminide products directly using EBM technology in important aerospace and automotive applications. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1887 / 1894

页数：8

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