Structures and properties of Ti-5Al-5Mo-5V-1Cr-1Fe after Nb implantation

Affiliation of Author(s):材料科学与技术学院

Journal:SURFACE & COATINGS TECHNOLOGY

Key Words:Ion implantation Hardness Titanium alloys Wear Fatigue

Abstract:In this study, Ti-5Al-5Mo-5V-1Cr-1Fe was implanted with Nb at 45 kV with dosages ranging from 1.0 X 10(16) ions/cm(2) to 1.0 x 10(17) ions/cm(2) in order to investigate their influence on the wear resistance and fatigue performance. The microstructure and elemental depth profiles were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The roughness and mechanical behavior were studied using the optical 3D Infinite Focus and dynamic ultra-microhardness tester respectively. Experimental results indicated that the wear resistance against a GCr15 ball was improved after Nb implantation. Particularly, the specific wear rate of the implanted samples with a dosage of 5.0 x 10(16) ions/cm(2) was lowest (0.2 mm(3).N-1.m(-1)), nearly 10% of the substrate. However, the theoretical fatigue limit of the substrate decreased after Nb implantation. The mechanisms on how wear and high-cycle fatigue properties were affected by Nb implantation with different dosages were discussed in detail.

ISSN No.:0257-8972

Translation or Not:no

Date of Publication:2019-01-25

Co-author:Chen, Xiaohu,Wei Dongbo,Huang, Xiao,Adriana, Soveja,Michel, Chaussumier,Ding, Feng,Li, Fengkun

Correspondence Author:Zhang Pingze

Date of Publication:2019-01-25