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

Effect of laser processing parameters on mechanical properties of porous tantalum fabricated by... PurposeAdditive 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/approachIn this paper, porous tantalum structures with different scan distance were fabricated by AM using laser multi-layer micro-cladding.FindingsPorous 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/implicationsThis paper does not demonstrate the implant results.Practical implicationsIt can be used as implant material for the repair bone.Social implicationsIt can be used for fabrication of other porous materials.Originality/valueThis paper system researched the scan distance on how to influence the mechanical properties of fabricated porous tantalum structures. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Rapid Prototyping Journal Emerald Publishing

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

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
1355-2546
DOI
10.1108/RPJ-05-2014-0068
Publisher site
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Abstract

PurposeAdditive 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/approachIn this paper, porous tantalum structures with different scan distance were fabricated by AM using laser multi-layer micro-cladding.FindingsPorous 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/implicationsThis paper does not demonstrate the implant results.Practical implicationsIt can be used as implant material for the repair bone.Social implicationsIt can be used for fabrication of other porous materials.Originality/valueThis paper system researched the scan distance on how to influence the mechanical properties of fabricated porous tantalum structures.

Journal

Rapid Prototyping Journal – Emerald Publishing

Published: Jun 20, 2017

References

  • Characteristics of bone ingrowth and interface mechanics of a new porous tantalum biomaterial
  • Interface in analogue biomaterials
  • Properties of Ti-6Al-4V non-stochastic lattice structures fabricated via electron beam melting
  • Fabrication methods of porous tantalum metal implants for use as biomaterials
  • The elastic moduli of human subchondral, trabecular, and cortical bone tissue and the size-dependency of cortical bone modulus
  • Rapid manufacturing of metal components by laser forming
  • Interface interactions between porous titanium/tantalum coatings, produced by Selective Laser Melting (SLM), on a cobalt–chromium alloy