Effect of Fe addition on phase evolution, microstructure and properties of Ti₅₀Ni_50-XFe_X alloy

Abstract

The work aims to study the effect of the Fe content on the properties of Ti₅₀ Ni_(50−X) Fe_X alloy (where X = 0, 2, 4, 6, 8, and 10 at.-%) sintered at 1050°C and 1150°C using the conventional sintering technique. The microstructure, chemical composition and phase evolution of the sample were analysed by SEM, EDS, and XRD, respectively, along with various properties. It was observed that the sintered sample microstructure consists of (Ni, Fe)-rich, and Ti-rich phases. Here, the porosity decreases, whereas density, hardness, and wear resistance increase with the increasing temperature. The 8at.-%Fe sample shows lower porosity and higher wear resistance, relative density and hardness value than other Fe content samples. The 2at.-%Fe sample sintered at 1050°C shows a higher shape recovery value compared to other compositions sintered at various temperatures.

KEYWORDS:

• Shape memory effect
• TiNiFe
• sintering
• intermetallic
• density
• hardness

Acknowledgements

This is a part of academic research work and is under the support of the Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela, India.

Disclosure statement

No potential conflict of interest was reported by the author(s).