Journal article
Microstructure, mechanical and wear properties of laser surface melted Ti6Al4V alloy
Journal of the mechanical behavior of biomedical materials, Vol.32, pp.335-344
04/2014
Handle:
https://hdl.handle.net/2376/116593
PMID: 24388220
Abstract
Laser surface melting (LSM) of Ti6Al4V alloy was carried out with an aim to improve properties such as microstructure and wear for implant applications. The alloy substrate was melted at 250W and 400W at a scan velocity of 5mm/s, with input energy of 42J/mm(2) and 68J/mm(2), respectively. The results showed that equiaxed α+β microstructure of the substrate changes to mixture of acicular α in β matrix after LSM due to high cooling rates in the range of 2.25×10(-3)K/s and 1.41×10(-3)K/s during LSM. Increasing the energy input increased the thickness of remelted region from 779 to 802µm and 1173 to 1199µm. Similarly, as a result of slow cooling rates under present experimental conditions, the grain size of the alloy increased from 4.8μm to 154-199μm. However, the hardness of the Ti6Al4V alloy increased due to LSM melting and resulted in lowest in vitro wear rate of 3.38×10(-4)mm(3)/Nm compared to untreated substrate with a wear rate of 6.82×10(-4)mm(3)/Nm.
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Details
- Title
- Microstructure, mechanical and wear properties of laser surface melted Ti6Al4V alloy
- Creators
- Vamsi Krishna Balla - W.M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USAJulie Soderlind - W.M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USASusmita Bose - W.M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USAAmit Bandyopadhyay - W.M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA. Electronic address: amitband@wsu.edu
- Publication Details
- Journal of the mechanical behavior of biomedical materials, Vol.32, pp.335-344
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- Netherlands
- Identifiers
- 99900547932501842
- Language
- English
- Resource Type
- Journal article