Effect of Laser Cladding Processing Parameters on Nitinol’s Clad Dimensions, Microstructure, and Hardness
- 1 Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt
- 2 Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt
- 3 Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt
- 4 National Laser Centre, The Council for Scientific and Industrial Research, Pretoria, South Africa
- 5 Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt
Abstract
Nickel Titanium alloy (Nitinol) is characterized by its good mechanical properties, good damping properties in addition to its distinctive shape-memory effect and superelasticity effect besides its great bio-mechanical compatibility and corrosion resistance. These properties have empowered its applications, particularly within the bio-medical and aerospace industry. Despite these exceptional properties, the manufacturing of Nitinol by conventional methods is exceptionally troublesome and costly and consequently must be inspected. Therefore, additive manufacturing specifically laser-based ones were used recently. In this research, the effect of processing parameters of laser cladding/laser direct deposition on Nitinol’s Microstructure, Hardness and Clad Dimensions was evaluated. Systematic characterization of Nitinol samples was done utilizing Optical Microscopy and Vickers hardness tester. Samples of Nitinol were synthesized with different processing parameters using laser cladding and its properties were investigated and compared to one another to get the optimum processing parameters to synthesize a near net shape, fully dense Nitinol component with reliable properties. The results showed that there’s a processing parameter window at which the alloy possesses its best mechanical and functional properties which were of Laser power of value 1.25 Kw, Scan speed of 1.5 m/min and powder deposition rate of 1.5/1.5 RPM, these conditions resulted in the formation of martensite phase which is responsible for its functional properties with 40% volume fraction and a hardness value of 598 HV.
- Elahinia, M. (2015) Shape Memory Alloy Actuators: Design, Fabrication, and Experimental Evaluation. John Wiley and Sons, Hoboken, New Jersey. https://doi.org/10.1002/9781118426913
- Shishkovsky, I., et al. (2008) Porous Biocompatible Implants and Tissue Scaffolds Synthesized by Selective Laser Sintering from Ti and NiTi. Journal of Materials Chemistry, 18, 1309-1317. https://doi.org/10.1039/b715313a
- Andani, M.T., et al. (2014) Metals for Bone Implants. Part 1. Powder Metallurgy and Implant Rendering. Acta Biomaterialia, 10, 4058-4070. https://doi.org/10.1016/j.actbio.2014.06.025
- Shayesteh Moghaddam, N., et al. (2015) Three Dimensional Printing of Stiffness-Tuned, Nitinol Skeletal Fixation Hardware with an Example of Mandibular Segmental Defect Repair. Procedia CIRP, 49, 45-50. https://doi.org/10.1016/j.procir.2015.07.027
- Otsuka, K. and Kakeshita, T. (2002) Science and Technology of Shape-Memory Alloys: New Developments. MRS Bulletin, 27, 91-100. https://doi.org/10.1557/mrs2002.43
- Mohd Jani, J., Leary, M., Subic, A. and Gibson, M.A. (2014) A Review of Shape memory Alloy Research, Applications and Opportunities. Materials & Design, 56, 1078-1113. https://doi.org/10.1016/j.matdes.2013.11.084
- Icardi, U. and Ferrero, L. (2009) Preliminary Study of an Adaptive Wing with Shape Memory Alloy Torsion Actuators. Materials & Design, 30, 4200-4210. https://doi.org/10.1016/j.matdes.2009.04.045
- Bhardwaj, A., Gupta, A.K., Padisala, S.K. and Poluri, K. (2019) Characterization of Mechanical and Microstructural Properties of Constrained Groove Pressed Nitinol Shape Memory Alloy for Biomedical Applications. Materials Science and Engineering: C, 102, 730-742. https://doi.org/10.1016/j.msec.2019.04.070
- Chekotu, J.C., Groarke, R., O’Toole, K. and Brabazon, D. (2019) Advances in Selective Laser Melting of Nitinol Shape Memory Alloy Part production. Materials (Basel), 12, Article No. 809. https://doi.org/10.3390/ma12050809
- Elahinia, M., et al. (2012) Manufacturing and Processing of NiTi Implants: A Review. Progress in Materials Science, 57, 911-946. https://doi.org/10.1016/j.pmatsci.2011.11.001
- Harun, W.S.W., Kamariah, M.S.I.N., Muhamad, N., Ghani, S.A.C., Ahmad, F. and Mohamed, Z. (2018) A Review of Powder Additive Manufacturing Processes for Metallic Biomaterials. Powder Technology, 327, 128-151. https://doi.org/10.1016/j.powtec.2017.12.058
- Baran, A. and Polanski, M. (2018) Microstructure and Properties of LENS (Laser Engineered Net Shaping) Manufactured Ni-Ti Shape Memory Alloy. Journal of Alloys and Compounds, 750, 863-870. https://doi.org/10.1016/j.jallcom.2018.03.400