Microstructure and Corrosion Resistance of Laser-Welded Crossed Nitinol Wires.
Microstructure and Corrosion Resistance of Laser-Welded Crossed Nitinol Wires.
复制标题
激光焊接交叉镍钛合金丝的显微组织和耐腐蚀性能
DOI：
10.3390/ma11050842
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发表时间：
2018-05-18
期刊：
影响因子：
--
通讯作者：
Zhou J
中科院分区：
文献类型：
--
作者：
Dong P;Yao R;Yan Z;Yan Z;Wang W;He X;Zhou J
激光焊接被认为是镍钛合金医疗器械制造中最有前途的连接工艺之一。目前，对于激光焊接对材料微观组织和腐蚀行为的影响，人们的认识还很有限。这项工作的目的是揭示影响激光焊接交叉镍钛合金接头的耐腐蚀性的微观结构因素。利用透射电镜（TEM）对接头各区域的显微组织进行了表征，并研究了接头在0.9%NaCl和Hank's溶液中的腐蚀行为。基体金属表现出单一的奥氏体（B2）相和最高的耐腐蚀性。熔合区的相组成是B2基体和一些析出物（T2Ni、TiNi3和Ti3Ni4颗粒）的共存，导致耐腐蚀性略有下降。热影响区（HAZ）显示奥氏体基体，但有R相析出，这大大降低了腐蚀电位，使其成为最薄弱的区域。
Laser welding has been considered to be one of the most promising joining processes for Nitinol medical device manufacturing. Presently, there is still a limited understanding about how laser welding affects the microstructure and the resultant corrosion behaviors. This work aimed to reveal the microstructural factors that influence the corrosion resistance of laser-welded crossed Nitinol joints. The microstructures within various zones of the joints were characterized by using transmission electron microscopy (TEM), and the corrosion behaviors of the joints in 0.9% NaCl and Hank’s solutions were studied. The base metal exhibits a single austenite (B2) phase and the highest corrosion resistance. The phase constituent of the fusion zone is the coexistence of the B2 matrix and some precipitates (T2Ni, TiNi3, and Ti3Ni4 particles), resulting in a slight decrease in corrosion resistance. The heat affected zone (HAZ) shows the austenite matrix but with the precipitation of R-phase, which considerably reduces the corrosion potential, making it the weakest zone.
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影响因子：
14
作者：
Demri, B;HageAli, M;Muster, D
通讯作者：
Muster, D
影响因子：
4.5
作者：
Liu, K. Ting;Duh, J. Gong
通讯作者：
Duh, J. Gong
影响因子：
4.7
作者：
Yan, X. J.;Yang, D. Z.;Liu, X. P.
通讯作者：
Liu, X. P.
DOI：
10.1016/s0921-5093(99)00294-4
发表时间：
1999-12-15
影响因子：
6.4
作者：
Duerig, T;Pelton, A;Stöckel, D
通讯作者：
Stöckel, D
影响因子：
158.5
作者：
Kaiser, Christoph;Galatius, Soeren;Pfisterer, Matthias
通讯作者：
Pfisterer, Matthias