Laser welding of NiTi shape memory alloy: A review

被引：103
作者：
Mehrpouya, Mehrshad [1 ]
Gisario, Annamaria [1 ]
Elahinia, Mohammad [2 ]
机构：
[1] Sapienza Univ Rome, Dept Mech & Aerosp Engn, Via Eudossiana 18, I-00184 Rome, Italy
[2] Univ Toledo, Dept Mech Ind & Mfg Engn, 2801 W Bancroft St,MS 312,North Engn 2045, Toledo, OH 43606 USA
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2018年 / 31卷
关键词：
Laser welding; NiTi shape memory alloys; Superelasticity; Shape memory effect; Heat affected zone; Fusion zone; INDUCED MARTENSITIC-TRANSFORMATION; DIFFERENTIAL SCANNING CALORIMETRY; STRESS-CORROSION CRACKING; TI SUPERELASTIC ALLOY; MECHANICAL-PROPERTIES; HEAT-TREATMENT; R-PHASE; ELECTRICAL-RESISTIVITY; DEFORMATION-BEHAVIOR; CONSTITUTIVE MODEL;
D O I：
10.1016/j.jmapro.2017.11.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
NiTi shape memory alloys (SMA) are broadly employed in multifunctional systems in several industrial domains, like aerospace, automotive, biomedical and power plants. Their functional properties, which include shape memory effect (SME) and superelasticity (SE), offer a particular flexibility to design many smart components. However, scientists and practitioners are still facing some restrictions in machining processes and joining techniques of NiTi SMAs to both similar and dissimilar materials. Compared to other procedures, laser welding is an economical and reliable joining technique for NiTi SMAs. Nevertheless, it is considered a challenging technique, with many obstacles still to overcome to achieve welded joints characterized by the necessary strength and the required functionalities. In this respect, the present work investigates the effects of laser welding process on the functional properties of NiTi and related alloys. Mechanical, microstructural, and metallurgical effects of the process are reported, as well. Lastly, the impact of the post-weld heat treatment (PWHT) is studied as an effective solution to improve the downsides of the laser welding process. (C) 2017 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：162 / 186
页数：25
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