High specific strength and stiffness structures produced using selective laser melting

被引：134

作者：

Challis, Vivien J. ^{[1
]}

Xu, Xiaoxue ^{[2
]}

Zhang, Lai Chang ^{[3
]}

Roberts, Anthony P. ^{[1
]}

Grotowski, Joseph F. ^{[1
]}

Sercombe, Timothy B. ^{[2
]}

机构：

[1] Univ Queensland, Sch Math & Phys, St Lucia, Qld 4072, Australia

[2] Univ Western Australia, Sch Mech & Chem Engn, Perth, WA 6009, Australia

[3] Edith Cowan Univ, Sch Engn, Perth, WA 6027, Australia

来源：

MATERIALS & DESIGN | 2014年 / 63卷

基金：

澳大利亚研究理事会;

关键词：

MECHANICAL-PROPERTIES; TITANIUM FOAMS; BEHAVIOR; ALLOY; MICROSTRUCTURE; DEFORMATION;

D O I：

10.1016/j.matdes.2014.05.064

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Selective Laser Melting (SLM) was used to fabricate scaffolds using the titanium alloy Ti-6Al-4V. Two types of high porosity open-cell structures were manufactured: the first built from topology optimised designs with maximised stiffness, and the second from gyroid labyrinths. In mechanical compression tests the scaffolds demonstrate exceptional strength-and stiffness-to-weight ratios. In particular, for densities in the range 0.2-0.8 g/cm(3) the topology optimised scaffolds have specific strength and stiffness that are superior to those of comparable materials in the literature. In addition, the optimised scaffolds have the benefit of being elastically isotropic. The results of finite element calculations accurately match the measured stiffness of the scaffolds. Calculated strain energy distributions provide insight into how the high stiffness and strength of the optimised designs is connected to their efficient distribution of load. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：783 / 788

页数：6

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