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Effect of laser processing parameters on mechanical properties of porous tantalum fabricated by laser multi-layer micro-cladding

Changjun Chen (Laser Processing Research Center, Soochow University, Suzhou, China)
Yang Li (School of Mechanical and Electrical Engineering, Processing Research Center, Soochow University, Suzhou, China)
Min Zhang (Laser Processing Research Center, Soochow University, Suzhou, China)
Xiaonan Wang (Shagang School of Iron and Steel, Soochow University, Suzhou, China)
Chao Zhang (Laser Processing Research Center, Soochow University, Suzhou, China)
Hemin Jing (School of Materials Science and Engineering, Anhui University of Technology, Ma’ansha, China)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 20 June 2017

Abstract

Purpose

Additive manufacturing (AM), a method used in the nuclear, space and racing industries, allows the creation of customized titanium alloy scaffolds with highly defined external shape and internal structure using rapid prototyping as supporting external structures within which bone tissue can grow. AM allows porous tantalum parts with mechanical properties close to that of bone tissue to be obtained.

Design/methodology/approach

In this paper, porous tantalum structures with different scan distance were fabricated by AM using laser multi-layer micro-cladding.

Findings

Porous tantalum samples were tested for resistance to compressive force and used scanning electron microscope to reveal the morphology of before and after compressive tests. Their structure and mechanical properties of these porous Ta structures with porosity in the range of 35.48 to 50 per cent were investigated. The porous tantalum structures have comparable compressive strength 56 ∼ 480 MPa, and elastic modulus 2.8 ∼ 9.0GPa, which is very close to those of human spongy bone and compact bone.

Research limitations/implications

This paper does not demonstrate the implant results.

Practical implications

It can be used as implant material for the repair bone.

Social implications

It can be used for fabrication of other porous materials.

Originality/value

This paper system researched the scan distance on how to influence the mechanical properties of fabricated porous tantalum structures.

Keywords

Acknowledgements

This work was supported by National Nature Science Foundation of China with a grant No.51104110, and Suzhou Science and Technology Bureau with grant No. SYG201231, No. SYG201642. This work is also supported by the fund of the State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology (SKLAB02014006).

Citation

Chen, C., Li, Y., Zhang, M., Wang, X., Zhang, C. and Jing, H. (2017), "Effect of laser processing parameters on mechanical properties of porous tantalum fabricated by laser multi-layer micro-cladding", Rapid Prototyping Journal, Vol. 23 No. 4, pp. 758-770. https://doi.org/10.1108/RPJ-05-2014-0068

Publisher

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Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited