Anisotropy in the impact toughness of selective laser melted Ti-6Al-4V alloy

被引：92
作者：
Wu, Ming-Wei [1 ]
Lai, Pang-Hsin [1 ]
Chen, Jhewn-Kuang [1 ]
机构：
[1] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei 10608, Taiwan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 650卷
关键词：
Selective laser melting; Titanium alloys; Impact test; Fracture; Scanning electron microscopy; MECHANICAL-BEHAVIOR; MICROSTRUCTURE; MANUFACTURE; PARAMETERS; FATIGUE; STEEL;
D O I：
10.1016/j.msea.2015.10.045
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Apparent anisotropies have been found in the mechanical properties of selective laser melted Ti-6Al-4V alloy. This study investigated the influences of the vertical and horizontal building directions on the impact toughness of selective laser melted Ti-6Al-4V, and a mechanism for the anisotropy in toughness is proposed. Disc-shaped building defects were clearly observed, even though the relative density was as high as 99.5%. The directionality of these defects reduces the load-bearing cross-section of a vertical specimen relative to that of a horizontal specimen; consequently, the impact energy of a horizontal specimen is 96% higher than that of a vertical specimen. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：295 / 299
页数：5
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