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Improvement of mechanical properties of NiAl-Cr(Mo) alloy by Ti addition

H. DEMIRTAS1,* , A. GUNGOR1

Affiliation

  1. Department of Metallurgical and Materials Engineering, Karabuk University, 78050, Karabuk, Turkey

Abstract

In this study, the influence of 4, 5 and 6 at.% Ti addition on the mechanical properties of NiAl-Cr(Mo) eutectic alloy was in-vestigated. The microstructure of the alloys were determined by using XRD, SEM, EDX analyses and mechanical properties were investigated by micro and macro hardness measurements and compression tests at room temperature and 1000 °C. The results showed that Ni2AlTi Heusler phase precipitated in all Ti-added alloys and Ti addition inhibited eutectic cell for-mation by transforming lamellas Cr(Mo) phase into Cr(Mo) dendrites. In addition, hardness, room temperature and high temperature mechanical properties of NiAl-Cr(Mo) alloy improved significantly with the Ti addition..

Keywords

Nickel aluminide, Mechanical properties, NiAl-Cr(Mo).

Citation

H. DEMIRTAS, A. GUNGOR, Improvement of mechanical properties of NiAl-Cr(Mo) alloy by Ti addition, Optoelectronics and Advanced Materials - Rapid Communications, 9, 7-8, July-August 2015, pp.981-985 (2015).

Submitted at: March 23, 2015

Accepted at: June 24, 2015