eprintid: 9621
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/96/21
datestamp: 2023-11-09 16:36:16
lastmod: 2023-11-09 16:36:16
status_changed: 2023-11-09 16:29:25
type: article
metadata_visibility: show
creators_name: Zaharin, H.A.
creators_name: Rani, A.M.A.
creators_name: Azam, F.I.
creators_name: Ginta, T.L.
creators_name: Sallih, N.
creators_name: Ahmad, A.
creators_name: Yunus, N.A.
creators_name: Zulkifli, T.Z.A.
title: Effect of unit cell type and pore size on porosity and mechanical behavior of additively manufactured Ti6Al4V scaffolds
ispublished: pub
keywords: 3D printers; Aluminum alloys; Biomechanics; Bone; Compression testing; Computerized tomography; Elastic moduli; Geometry; ISO Standards; Medical applications; Melting; Pore size; Shielding; Structural optimization; Ternary alloys; Titanium alloys; Vanadium alloys; Yield stress, Cube; Gyroid; Porous; Selective laser melting; Stress shielding; Ti-6al-4v, Scaffolds (biology)
note: cited By 92
abstract: Porous metal structures have emerged as a promising solution in repairing and replacing damaged bone in biomedical applications. With the advent of additive manufacturing technology, fabrication of porous scaffold architecture of different unit cell types with desired parameters can replicate the biomechanical properties of the natural bone, thereby overcoming the issues, such as stress shielding effect, to avoid implant failure. The purpose of this research was to investigate the influence of cube and gyroid unit cell types, with pore size ranging from 300 to 600 μm, on porosity and mechanical behavior of titaniumalloy (Ti6Al4V) scaffolds. Scaffold samples weremodeled and analyzed using finite element analysis (FEA) following the ISO standard (ISO 13314). Selective laser melting (SLM) process was used to manufacture five samples of each type. Morphological characterization of samples was performed through micro CT Scan system and the samples were later subjected to compression testing to assess the mechanical behavior of scaffolds. Numerical and experimental analysis of samples show porosity greater than 50for all types, which is in agreementwith desired porosity range of natural bone. Mechanical properties of samples depict that values of elastic modulus and yield strength decreases with increase in porosity, with elastic modulus reduced up to 3 GPa and yield strength decreased to 7MPa. However, while comparing with natural bone properties, only cube and gyroid structure with pore size 300 μm falls under the category of giving similar properties to that of natural bone. Analysis of porous scaffolds show promising results for application in orthopedic implants. Application of optimum scaffold structures to implants can reduce the premature failure of implants and increase the reliability of prosthetics. © 2017 by the authors.
date: 2018
publisher: MDPI AG
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057523419&doi=10.3390%2fma11122402&partnerID=40&md5=8a70f70b013f62afdefac2a5b3bbd34b
id_number: 10.3390/ma11122402
full_text_status: none
publication: Materials
volume: 11
number: 12
refereed: TRUE
issn: 19961944
citation:   Zaharin, H.A. and Rani, A.M.A. and Azam, F.I. and Ginta, T.L. and Sallih, N. and Ahmad, A. and Yunus, N.A. and Zulkifli, T.Z.A.  (2018) Effect of unit cell type and pore size on porosity and mechanical behavior of additively manufactured Ti6Al4V scaffolds.  Materials, 11 (12).   ISSN 19961944