Abstract
Shape memory superelastic alloys as NiTi have mechanical properties and biocompatibility characteristics quite interesting for a set of industries, amongst which is the medical industry. They find applications in tools and devices where frequently joining between them and to other alloys as austenitic stainless steel is required. However, permanent joining of NiTi to stainless steel is problematic due to the formation of Fe–Ti intermetallics. Pulsed laser welding was studied to join thin foils of NiTi in similar and dissimilar joints to stainless steel. Joining NiTi to NiTi was succeeded with no weld defects. When joining NiTi to stainless steel, it was found that the material impinged by the laser determined the weld pool shape and structure, and it was better when the stainless steel foil was placed below the laser, because nickel enrichment of the weld pool was found to minimise cracking. The factors controlling the weld pool composition and, consequently, the quality of the weld were investigated and discussed.
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References
Rice C (2002) Shape memory alloys, applications. In: Schwartz M (ed) Encyclopedia of smart materials, vol. 1–2. Wiley, New York
Otsuka K, Wayman CM (eds) (1998) Shape memory materials. Cambridge University Press, Cambridge
Lagoudas DC (ed) (2008) Shape memory alloys: modeling and engineering applications. Springer, USA
Wolfgang P, Adam K, Bjorn B (2008) Engineering applications of NiTi shape memory alloys. Mater Sci Eng A 481–482:598–601
Vannod J, Hessler-Wyser A, Rappaz M (2008) Nd:YAG laser joining between stainless steel and nickel-titanium shape memory alloys, Proceedings of 14th European Microscopy Congress EMC 2008, Materials Science, 501–502
Gugel H, Schuermann A, Theisen W (2008) Laser welding of NiTi wires. Mater Sci Eng A 481–482:668–671
Nishikawa M, Tanaka H, Kohda M, Nagaura T, Watanabe K (1982) Behaviour of welded part of Ti-Ni shape memory alloy. J Phys Colloques 43:C4-839–C4-844
Qiu XM, Li MG, Sun DQ, Liu WH (2006) Study on brazing of TiNi shape memory alloy with stainless steels. J Mater Process Technol 176:8–12
Hsu YT, Wang YR, Wu SK, Chen C (2001) Effect of CO2 laser weld on the shape-memory and corrosion characteristics of TiNi alloys. Metall Mat Trans A 32A:569–576
Falvo A, Furgiuele FM, Maletta C (2005) Laser welding of a NiTi alloy: mechanical and shape memory behaviour. Mater Sci Eng A 412:235–240
Hall PC (2005) Method of welding titanium and titanium based alloys to ferrous metals. United States, United States Patent 6875949, 03/2003, 04/2005
Hall P (2004) Welding methods bond NiTi to stainless steel for implants. Adv Mater Process 162(8):30–38
ASM Handbook (1997) Volume 1, properties and selection: irons, steels, and high performance alloys, ed. ASM International
Chatterjee S, Abinandanan TA, Chattopadhyay K (2008) Phase formation in Ti/Ni dissimilar welds. Mater Sci Eng A 490:7–15
Wang G (1997) Welding of NiTi to stainless steel, in SMST-97: The Second International Conference on Shape Memory and Superelastic Technologies, Pacific Grove, CA, USA:131–136
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Pouquet, J., Miranda, R.M., Quintino, L. et al. Dissimilar laser welding of NiTi to stainless steel. Int J Adv Manuf Technol 61, 205–212 (2012). https://doi.org/10.1007/s00170-011-3694-7
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DOI: https://doi.org/10.1007/s00170-011-3694-7