Microstructures and properties of laser cladding NiTi alloy with W for biomedical applications

被引：12
|
作者：
Yan, X. J. [1 ]
Gugel, H. [2 ]
Huth, S. [2 ]
Theisen, W. [2 ]
机构：
[1] Dalian Univ, Sch Mech Engn, Dalian 116622, Peoples R China
[2] Ruhr Univ Bochum, Inst Mat, D-44801 Bochum, Germany
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 19-20期
关键词：
Shape memory materials; Laser processing; Microstructure; Radiopacity; Tungsten; SHAPE-MEMORY ALLOYS; TUNGSTEN COILS; DEGRADATION; TRANSFORMATION; BEHAVIOR; WIRES;
D O I：
10.1016/j.matlet.2011.06.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The feasibility of improving the radiopacity of NiTi by means of Nd:YAG laser cladding is investigated in the present study. Fine elementary tungsten powder was pasted on NiTi sheets and then melted using laser. The resulting microstructure was analyzed by a scanning electron microscope (SEM) equipped with energydispersive X-ray (EDX) spectrometry. The results show that the solubility of tungsten in the NiTi-matrix is low and the excessive tungsten forms fine precipitates and W-rich compounds, which result in the average W content in the fusion zone up to 8 at.%. The laser-clad sample failed near the end of the plateau with a tensile strength of about 410 MPa. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2934 / 2936
页数：3
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