Author(s)

S.-I. Nishida, S. Young, N. Hattori & A. Tsuchiyama

Abstract

Evaluation of surface treatment of Ti-6A1-4V alloy specimens S.-I. ~ishida', S. young2, N. ~attori' & A. ~suchi~arna~ I Faculty of Science & Engineering, Saga University, Honjo-machi I, Saga City, 840-8502, Japan 2 Graduate School of Saga University, ibid. 3 Fukuoka Industrial Technology Centec Yahata-higashiku, Kitakyushu City, 807-0831, Japan Abstract As is generally well known, though titanium and its alloys have high specific tensile strength, excellent corrosion resistance, etc., they have not been widely used until now mainly due to their extremely high processing cost. Therefore, it is considered that the above barrier will become smaller if it is possible to improve the mechanical properties of Ti-alloys by applying surface treatments on them. The purpose of this paper is to improve and to evaluate the mechanical properties, especially fatigue strength of about 6 lunds of surface-treated Ti-6A1- 4V alloys. That is, surface treatments by 2 kinds of plasma, 3 kinds of DLC (diamond-like

Keywords