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

被引：85

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

页码：295 / 299

页数：5

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