中國有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 27 No. 4 April 2017 |
（1. Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Azurém, 4800-058 Guimar？es, Portugal;
2. Cross-Border Faculty of Humanities, Economics and Engineering, “Dun？rea de Jos” University of Gala？i, Domneasc？ 47, 800008 Galati, Romania;
3. Centre for Rapid and Sustainable Product Development Polytechnic Institute of Leiria, Rua General Norton de Matos, Apartado 4133, 2411-901 Leiria, Portugal）
Abstract:The aim of this work was to study the influence of the processing route on the microstructural constituents, hardness and tribological (wear and friction) behavior of Ti6Al4V biomedical alloy. In this sense, three different processing routes were studied: conventional casting, hot pressing and selective laser melting. A comprehensive metallurgical, mechanical and tribological characterization was performed by X-ray diffraction analysis, Vickers hardness tests and reciprocating ball-on-plate wear tests of Ti6Al4V/Al2O3 sliding pairs. The results showed a great influence of the processing route on the microstructural constituents and consequent differences on hardness and wear performance. The highest hardness and wear resistance were obtained for Ti6Al4V alloy produced by selective laser melting, due to a markedly different cooling rate that leads to significantly different microstructure when compared to hot pressing and casting. This study assesses and confirms that selective laser melting is potential to produce customized Ti6Al4V implants with improved wear performance.
Key words: biomedical alloy; Ti6Al4V alloy; wear behavior; microstructure; selective laser melting; hot pressing; casting
