Changbin Tang Likes:

Affiliation of Author(s):

化学与化工学院

Journal:

Applied Surface Science and Engineering Research Support soCiety

Key Words:

中文关键字：微动疲劳；微动磨损；钛合金；离子渗Mo；喷丸强化，英文关键字：

Abstract:

Effect of plasma molybdenizing and shot-peening on fretting wear and fretting fatigue behaviors of Ti6Al4V alloy was investigated. The plasma molybdenized layer composed of a dense molybdenum deposition layer and a Mo–Ti solid–solution layer can increase surface hardness by 2.8 times and cause its volume loss by fretting wear to decrease to 1/14 compared with that of the substrate. Plasma molybdenized treatment results in a significant decrease in resistance of the substrate to fretting fatigue. It is ascribed that the molybdenized layer with high hardness yields a low toughness, and its high surface roughness leads to a micro-notched effect. However, proper combination plasma molybdenizing and subsequent shot-peening may enhance the simultaneous fretting fatigue and fretting wear resistance of Ti6Al4V significantly, which can decrease the fretting wear volume loss to 1/27, and may increase the fretting fatigue life by more than 69 times. A synergistic improvement in fretting fatigue of the titanium alloy by combining surface alloying with shot-peening can be achieved. The results indicate that a beneficial residual compressive stress distribution, high surface hardness with suitable hardness gradient distribution, good apparent toughness, relatively low surface roughness, and excellent surface integrity are achieved.

Note:

唐长斌

Co-author:

Dao-xinLiu,BinTang,Xiao-huaZhang,LinQin,Ch

First Author:

Changbin Tang

Indexed by:

Journal paper

Volume:

卷：390

Issue:

期：

Page Number:

页：946-958

Translation or Not:

no

Date of Publication:

2016-12-01