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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: [email protected])
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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
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Copyright
Copyright © Materials Research Society 2020

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References

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