Influence of deposition orientation on fatigue response of LENS™ processed Ti6Al4V

被引：18

作者：

Bandyopadhyay, Amit ^{[1
]}

Upadhyayula, Mahadev ^{[1
]}

Traxel, Kellen D. ^{[1
]}

Onuike, Bonny ^{[1
]}

机构：

[1] Washington State Univ, Sch Mech & Mat Engn, WM Keck Biomed Mat Res Lab, Pullman, WA 99164 USA

来源：

MATERIALS LETTERS | 2019年 / 255卷

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

Additive manufacturing; Ti6Al4V; Compression; Fatigue failure; LENS (TM); LASER DEPOSITION; TI-6AL-4V; BEHAVIOR; DEFORMATION; COMPONENTS; MECHANISMS;

D O I：

10.1016/j.matlet.2019.126541

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

( )Understanding processing-property relationships for directed-energy-deposition (DED) parts remains a major roadblock to widespread process implementation. Herein we investigate the effect of scanning-strategy and testing-orientation on the fatigue response of as-printed Ti6Al4V components. At similar to 10(6) cycles, samples tested in the build-direction exhibited similar to 45% decrease in fatigue strength relative to the horizontally-tested samples, owing to higher overall porosity and the testing orientation relative to residual pores. Samples failing <10(6) cycles demonstrated tortuous surfaces, whereas samples enduring >10(6) cycles exhibited smoother-surfaces. Our results indicate that DED-produced parts can exhibit directionally-dependent fatigue performance, and print-strategy must be taken into consideration for dynamic-loading applications. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：4

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