Hostname: page-component-76fb5796d-2lccl Total loading time: 0 Render date: 2024-04-26T17:33:34.592Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of niobium (Nb) on mechanical properties of laser coated Nitinol (NiTi) used for surface modification of Ti6Al4V alloy

Published online by Cambridge University Press:  11 March 2020

B.S Skhosane ,
M Tlotleng Open the ORCID record for M Tlotleng [Opens in a new window]  and
S.L Pityana
B.S Skhosane*
Affiliation:
Laser Enabled Manufacturing National Laser Centre CSIR, Pretoria, 0001, South Africa
M Tlotleng
Affiliation:
Laser Enabled Manufacturing National Laser Centre CSIR, Pretoria, 0001, South Africa Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Campus, Johannesburg, 2006, South Africa
S.L Pityana
Affiliation:
Laser Enabled Manufacturing National Laser Centre CSIR, Pretoria, 0001, South Africa Department of Chemical and Metallurgical Engineering, Tshwane University of Technology, Pretoria, 0001, South Africa
*
*(Email: SSkhosane@csir.co.za)
Get access

Abstract:

Laser surface treatment is widely used as an engineering technique due to its special characteristics and several advantages over other surface modification techniques. In the present study, elemental mechanically pre-alloyed powder consisting of Niobium, Titanium and Nickel was deposited onto a grade 5 Titanium alloy substrates to form a high wear resistance coating. This was such that the surface mechanical properties of the base metal can be improved. The fabricated samples were characterised using optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), Differential Scanning Calorimeter (DSC), micro hardness tester and wear machine. The deposited coatings were well bonded and consisted of various phases. Hardness was seen decrease with increase in Nb content while wear resistance increasing with increase in niobium content.

Keywords

coatinglaserNbNiTi
Type
Articles
Information
MRS Advances , Volume 5 , Issue 23-24: African Materials Research Society 2019 , 2020 , pp. 1235 - 1244
Check for updates
Copyright
Copyright © Materials Research Society 2020

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES:

Ali, S., Hussein, A., Nofal, A., Elnaby, S., Elgazzar, H. and Sabour, H., “Laser Powder Cladding of Ti-6Al-4V α/β Alloy,” Materials 10 , vol. 10, 2017.Google Scholar
Mokgalaka, M., Pityana, S., Popoola, P. and Mathebula, T., “NiTi intermetallic surface coatings by laser metal deposition for improving wear properties of Ti-6Al-4V substrates,” Advances in materials Science and engineering, 2014.CrossRefGoogle Scholar
Ou, S.-F., Peng, B.-Y., Chen, Y.-C. and Tsai, M.-H., “Manufacturing and characterization of NiTi alloy with functional properties by selective laser melting,” Metals 8 , vol. 5, p. 324, 2018.CrossRefGoogle Scholar
Abioye, T.E., Farayibi, P., Kinnel, P. and Clare, A.T., “Fuctionally graded Ni-Ti microstructure synthesised in process by direct laser metal diposition,” Springer, 2015.Google Scholar
Tian, Y., Lin, C., Yu, J., Liu, Z., Zhang, Y. and Jia, S., “Surface modification of TC4 Ti alloy by laser cladding with Ni-Ti-Nb powders.,” In MATEC Web of Conferences , vol. Vol. 189, p. 01004, 2018.CrossRefGoogle Scholar
Simpson, J. A., Melton, K. and Duerig, T.., “Nickel/titanium/niobium shape memory alloy & article,” U.S. Patent , Vols. 4,770,725, 1988.Google Scholar
Bertilsson, T., “Intermetallic Compound Formation in Ni-Ti-Fe Powder Mixtures,” material engineering , pp. 1-2, 2018.Google Scholar
Chekotu, J., Groarke, R., O’Toole, K. and Brabazon, D., “Advances in Selective Laser Melting of Nitinol Shape Memory Alloy Part Production,” Materials , vol. 12.5, p. 809, 2019.CrossRefGoogle Scholar
Piao, M., Miyazaki, S. and Otsuka, K., “Characteristics of deformation and transformation in Ti44Ni47Nb9 shape memory alloy.” Materials Transactions , pp. 346-353, 1992.CrossRefGoogle Scholar
Piao, M., Miyazaki, S., Otsuka, K. and Nishida, N.., “Effects of Nb addition on the microstructure of Ti–Ni alloys,” Materials Transactions,JIM 33, vol. 4, pp. 337-345, 1992.CrossRefGoogle Scholar
Askeland, D. R. and Phule, P. P., “The science and engineering of materials,” Brooks/cole, 2003.Google Scholar