SAIP2017

Mechanical properties and temperature dependence of B19Ti_50-xZr_x Pt₅₀ shape memory alloys

5 Jul 2017, 17:10

1h 50m

3rd and 4th floor passages (Engineering Building 51)

Board: 06

Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster Session 2

Speaker

Mr Mordecai Mashamaite (Materials Modeling Centre)

Description

A molecular dynamic study of Ti_50-x Zr_x Pt₅₀ as potential high temperature shape memory alloy has been performed using the LAMMPS code. The lattice dynamics, elastic properties and temperature dependence were deduced to determine the effect of ternary addition with Zr on the Ti sub-lattice at varied temperature range. It was found that the lattice parameter increases with Zr addition, the thermodynamic stability was observed at 5 at. % Zr. Furthermore, the elastic properties showed positive shear modulus for concentrations range 5 - 25 at. % Zr, indicating stability of the structures and instability above 25 at. % Zr concentrations. More importantly, we observed a martensitic transformation behaviour for Ti_50-x Zr_x Pt₅₀ (x= 3.125, 9.375) at around 900K.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

PhD

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Main supervisor (name and email)<br>and his / her institution

Prof. Hasani Chauke

hr.chauke@ul.ac.za

Peer reviewing

Paper

Accepted on 10 Jul 2018 by Japie Engelbrecht

SAIP_Paper_2017_MashamaiteMP_ID290.pdf