Fracture Behaviour of Nickel-Titanium Laser Welded Joints
Source abstract
Abstract
In this study, the effects of Nd:YAG laser welding on the fracture behavior of Ni-rich nickel-titanium sheets are analyzed by experimental investigations. The welding was carried out in open air conditions by using a special shielding/clamping system to avoid the chemical contamination of the molten zone and the formation of hot cracks. Mechanical tests of standard dog bone-shaped and single edge crack specimens were carried out to measure the stress-strain response and the fracture resistance of both the base and the welded materials. Furthermore, scanning electron microscopy observations of the fracture surfaces were carried out in order to better understand the failure mechanisms. Finally, systematic comparative studies between base and laser-welded materials were carried out.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Titanium Alloys Microstructure and Properties · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (14)
Show source-provided references
1. K. Otsuka, and X. Ren, Physical Metallurgy of Ti-Ni-based Shape Memory Alloys, Prog. Mat. Sci. 50(5), 511–678 200510.1016/j.pmatsci.2004.10.001 ↗
2. A. Tuissi, S. Besseghini, T. Ranucci, F. Squatrito, and M. Pozzi, Effect of Nd-YAG Laser Welding on the Functional Properties of the Ni-49.6at.%Ti, Mater. Sci. Eng. A, 273–275, 813–817 199910.1016/S0921-5093(99)00422-0 ↗
3. A. Falvo, F. Furgiuele, and C. Maletta, Laser Welding of a NiTi Alloy: Mechanical and Shape Memory Behaviour, Mater. Sci. Eng. A, 412(1–2), 235–240 200510.1016/j.msea.2005.08.209 ↗
4. A. Falvo, F. Furgiuele, and C. Maletta, Functional Behaviour of a NiTi Welded Joint: Two Way Shape Memory Effect, Mater. Sci. Eng. A, 481–482 (1–2), 647–650 200810.1016/j.msea.2006.11.178 ↗
5. P. Schlossmacher, T. Haas, and A. Shussler, Laser-Welding of a Ni-Rich TiNi Shape Memory Alloy: Mechanical Behavior, J. Phys. IV Coll., C 5, 251–256 1997
6. P. Schlossmacher, T. Haas, and A. Shussler, Laser Welding of Ni-Ti Shape Memory Alloys, SMST-94: Proceedings of the 1st International Conference on Shape Memory and Superelastic Technologies, March 7–10, 1994 (Pacific Grove, CA), p 85–90
7. T. Haas and A. Schuessler, Welding and Joining of TiNi Shape Memory Alloys: Engineering Aspects and Medical Applications, SMST-99: Proceedings of the 1st European Conference on Shape Memory and Superelastic Technologies, Sept. 5–6, 1999 (Paris), p 103–114
8. J.H. Chen, W. Sun, and G.Z. Wang, Investigation on the Fracture Behavior of Shape Memory Alloy NiTi, Metall. Mater. Trans. A, 36, 941–955 200510.1007/s11661-005-0288-8 ↗
9. S. Gollerthan, D. Herberg, A. Baruj, and G. Eggeler, Compact Tension Testing of Martensitic/Pseudoplastic NiTi Shape Memory Alloys, Mater. Sci. Eng. A, 481–482 156–159 200810.1016/j.msea.2007.03.126 ↗
10. S.W. Robertson, A. Mehta, A.R. Pelton, and R.O. Ritchie, Evolution of Crack-tip Transformation Zones in Superelastic Nitinol Subjected to In Situ Fatigue: A Fracture Mechanics and Synchrotron X-ray Microdiffraction Analysis, Acta Mater., 55, 6198–6207 200710.1016/j.actamat.2007.07.028 ↗
11. M.R. Daymond, M.L. Young, J.D. Almer, and D.C. Dunand, Strain and Texture Evolution During Mechanical Loading of a Crack Tip in Martensitic Shape-memory NiTi, Acta Mater., 55, 3929–3942 200710.1016/j.actamat.2007.03.013 ↗
12. X.M. Wang, Y.F. Wang, A. Baruj, G. Eggeler, and Z.F. Yue, On the Formation of Martensite in Front of Cracks in Pseudoelastic Shape Memory Alloys, Mater. Sci. Eng. A, 394, 393–398 200510.1016/j.msea.2004.11.029 ↗
13. G.Z. Wang, A Finite Element Analysis of Evolution of Stress-Strain and Martensite Transformation in Front of a Notch in Shape Memory Alloy NiTi, Mater. Sci. Eng. A, 460–461(00), 383–391 200710.1016/j.msea.2007.01.154 ↗
14. “Standard Test Method of Sharp-Notch Tension Testing of High-Strength Sheet Materials,” E338-91, Annual Book of ASTM Standards 03.01, 1996, p 360–365