Characterization of Ti-6Al-4V open cellular foams fabricated by additive manufacturing using electron beam melting

被引：193
|
作者：
Murr, L. E. [1 ,2 ]
Gaytan, S. M. [1 ,2 ]
Medina, F. [2 ]
Martinez, E. [1 ,2 ]
Martinez, J. L. [1 ,2 ]
Hernandez, D. H. [1 ,2 ]
Machado, B. I. [1 ,2 ]
Ramirez, D. A. [1 ,2 ]
Wicker, R. B. [2 ,3 ]
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] Univ Texas El Paso, Dept Mech Engn, El Paso, TX 79968 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 7-8期
关键词：
Electron beam melting; Open cellular foam fabrication; Elastic modulus measurement; Optical microscopy; SEM and TEM characterization; MECHANICAL-BEHAVIOR; TITANIUM;
D O I：
10.1016/j.msea.2009.11.015
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ti-6Al-4V open cellular foams were fabricated by additive manufacturing using electron beam melting (EBM). Foam models were developed from CT-scans of aluminum open cellular foams and embedded in CAD for EBM. These foams were fabricated with solid cell structures as well as hollow cell structures and exhibit tailorable stiffness and strength. The strength in proportion to the measured microindentation hardness is as much as 40% higher for hollow cell (wall) structures in contrast to solid, fully dense EBM fabricated components. Plots of relative stiffness versus relative density were in good agreement with the Gibson-Ashby model for open cellular foam materials. Stiffness or Young's modulus values measured using a resonant frequency-clamping analysis technique were found to vary inversely with porosity especially for solid cell wall, open cellular structure foams. These foams exhibit the potential for novel biomedical, aeronautics, and automotive applications. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1861 / 1868
页数：8
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