Rapid surface nitriding of titanium alloy by a nanosecond fiber laser under atmospheric conditions

被引：19
|
作者：
Katahira, Kazutoshi [1 ]
Tanida, Yusuke [2 ]
Takesue, Shogo [2 ]
Komotori, Jun [2 ]
机构：
[1] RIKEN, Mat Fabricat Lab, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
[2] Keio Univ, Dept Mech Engn, Kohoku Ku, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan
来源：
CIRP ANNALS-MANUFACTURING TECHNOLOGY | 2018年 / 67卷 / 01期
关键词：
Laser; Titanium; Surface modification; Nitriding; TI-6AL-4V ALLOY; RESISTANCE;
D O I：
10.1016/j.cirp.2018.04.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A modified surface layer using a Yb nanosecond fiber laser beam under atmospheric conditions was fabricated by applying a surface nitriding process on disc-shaped Ti-6Al-4V samples. On the generated surface, a melt layer comprising a TiN dendrite structure and a heat affected zone containing a needle-like a phase were detected. The modified layer exhibited optimal characteristics with the treatment at a laser output power of 12 W, resulting in a hardness of 12 GPa. The results of friction wear evaluation tests revealed that the layer exhibited superior abrasion resistance compared with an untreated Ti-6Al-4V substrate. (C) 2018 CIRP. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：563 / 566
页数：4
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