A mechanical comparison of alpha and beta phase biomedical TiTa lattice structures

被引：14

作者：

Brodie, Erin G. ^{[1
,2
]}

Wegener, Thomas ^{[3
]}

Richter, Julia ^{[3
]}

Medvedev, Alexander ^{[4
]}

Niendorf, Thomas ^{[3
]}

Molotnikov, Andrey ^{[1
,2
,4
]}

机构：

[1] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia

[2] Monash Ctr Addit Mfg MCAM, 11 Normanby Rd, Nottinghill, Vic 3168, Australia

[3] Univ Kassel, Inst Mat Engn Metall Mat, Moenchebergstr 3, D-34125 Kassel, Germany

[4] RMIT Univ, RMIT Ctr Addit Mfg, Sch Engn, Melbourne, Vic, Australia

来源：

MATERIALS & DESIGN | 2021年 / 212卷

关键词：

Tantalum; Titanium; Laser powder bed fusion; beta-titanium alloys; Lattice structures; LASER MELTING SLM; RESIDUAL-STRESS; MICROSTRUCTURE; TI-6AL-4V; BIOMATERIALS; EVOLUTION; BEHAVIOR; DESIGN; ALLOYS; PARAMETERS;

D O I：

10.1016/j.matdes.2021.110220

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recent orthopaedic implant alloy design has focused on beta-type Ti alloys, as the body centred cubic (BCC) crystal structure has the tendency to be characterised by a low elastic modulus. Nevertheless, the currently most used metal is Ti-6Al-4V, which mainly retains a hexagonal closed packed (HCP) crystal structure when produced by additive manufacturing. The benefits and disadvantages of the mechanical response of each crystal structure for implant applications is yet to be explored. Utilising the TiTa alloy system, low modulus Ti25Ta and Ti65Ta lattices were additively manufactured with opposing crystal structures of alpha' martensite (HCP) and beta grains (BCC). The lattices showed similar tensile, compressive and high cycle fatigue behaviour, indicating that the alpha' alloy was mechanically equal to the beta alloy for implant applications. The mechanical properties of both the TiTa lattices were also superior to identically manufactured lattices in Ti-6Al-4V in both as-built and heat treated conditions. (C) 2021 The Author(s). Published by Elsevier Ltd.

引用

页数：13

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