Improvement of fatigue properties of Ti-6Al-4V alloy under four-point bending by low temperature nitriding

被引：36
作者：
Kikuchi, Shoichi [1 ]
Yoshida, Sho [2 ]
Ueno, Akira [3 ]
机构：
[1] Shizuoka Univ, Dept Mech Engn, Fac Engn, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328561, Japan
[2] Ritsumeikan Univ, Grad Sch Sci & Engn, 1-1-1 Noji Higashi, Kusatsu, Shiga 5258577, Japan
[3] Ritsumeikan Univ, Dept Mech Engn, Coll Sci & Engn, 1-1-1 Noji Higashi, Kusatsu, Shiga 5258577, Japan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2019年 / 120卷
关键词：
Nitriding; Fatigue; Titanium alloy; Fractography; Fracture mechanics; COMMERCIALLY PURE TITANIUM; WEAR-RESISTANCE; PLASMA; STRENGTH; LAYER; SURFACES; BEHAVIOR; TIME;
D O I：
10.1016/j.ijfatigue.2018.11.005
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Low temperature nitriding (LTN) was performed for titanium alloy (Ti-6Al-4V) to improve its fatigue properties. A nitrogen compound layer was formed on the surface nitrided at temperatures higher than 873 K, whereas nitrogen diffusion was observed on the surface nitrided at 823 K. Fatigue tests were performed by four-point bending in air under a stress ratio of 0.1. The fatigue limit for Ti-6Al-4V tended to increase with a decrease in the nitriding temperature. LTN at 823 K increased the fatigue limit of Ti-6Al-4V due to the formation of the surface with no nitrogen compound layer and suppression of grain-coarsening.
引用
收藏
页码：134 / 140
页数：7
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