Tribological investigation of additive manufacturing medical Ti6Al4V alloys against Al2O3 ceramic balls in artificial saliva

Jiang Ju; Yang Zhou; Kaiming Wang; Yahui Liu; Jingjing Li; Maodong Kang; Jun Wang

doi:10.1016/j.jmbbm.2019.103602

Tribological investigation of additive manufacturing medical Ti6Al4V alloys against Al₂O₃ ceramic balls in artificial saliva

J Mech Behav Biomed Mater. 2020 Apr:104:103602. doi: 10.1016/j.jmbbm.2019.103602. Epub 2019 Dec 24.

Authors

Jiang Ju¹, Yang Zhou¹, Kaiming Wang², Yahui Liu¹, Jingjing Li¹, Maodong Kang¹, Jun Wang³

Affiliations

¹ School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China; Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
² State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, 1 Qing Hua Yuan, Haidian District, Beijing, 100084, PR China.
³ School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China; Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai, 200240, PR China. Electronic address: junwang@sjtu.edu.cn.

PMID: 31929093
DOI: 10.1016/j.jmbbm.2019.103602

Abstract

Additive manufacturing Ti6Al4V alloys have found their potential applications in artificial teeth and hip joints. In this work, the relationships between wear resistance, hardness and microstructure of Ti6Al4V alloys fabricated using various routes were investigated in artificial saliva. The results indicate that comparing with wrought and wrought + heat treated (HT) samples, the as-SLMed samples with hcp-α' martensite and few bcc-β phase exhibit higher hardness (∼410 HV) and better wear resistance. The as-SLMed samples, however, exhibit the worst wear resistance when wear direction is parallel to the molten pool line on XOZ-plane due to containing the softer fusion zone. Finally, the wear mechanism is discussed in detail, mainly including the abrasive and adhesive wear mechanism. The high hardness of matrix as well as the strong adhesion between the hardened layer, oxide layer and matrix are indispensable conditions for maintaining the optimum wear resistance.

Keywords: First-principles; Microstructure; SLM; TEM; Ti6Al4V alloy; Tribological behavior.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Alloys*
Ceramics
Hardness
Materials Testing
Saliva, Artificial
Titanium*

Substances

Alloys
Saliva, Artificial
titanium alloy (TiAl6V4)
Titanium