Microstructures and Mechanical Properties of Ti-Nb Alloy at Different Composition of Nb Produced via Powder Metallurgy Route

Abstract:

The aim of this study is to evaluate the effect of phase formation to the mechanical strength of Ti-Nb alloy produced by powder metallurgy (PM) process. Niobium (Nb) powder was added to the elemental titanium (Ti) powder by wt%, cold-compacted and sintered at 1200°C. The samples were characterized in term of shape and sizes of the particle, phases present, microstructures and compressive strength. XRD pattern showed that increasing Nb content resulted in increased beta-phases which also evidenced by a greater fraction of light gray-scale image in back-scattered SEM analysis. The alpha phase region almost eliminated in the 35 wt% Nb. The lowest compressive strength was observed in 45 wt% Nb is due to partly crystallized region in the microstructure observed. The alloy containing 35 wt% Nb exhibited better beta-phase structures in the matrix. The Young’s modulus of 13.46±2.44 GPa were obtained from 45 wt% Nb addition in the Ti alloy. All sintered samples are potential candidates for implant applications.

• Periodical: Materials Science Forum (Volume 863)
• Pages: 14-18
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.863.14
• Online since: August 2016
• Authors: Mazyan Yahaya*, Salhana Sahidin@Salehudin, Maheran Sulaiman, Nur Hidayatul Nadhirah Elmi Azham Shah, Muhammad Hussain Ismail
• Keywords: Beta Phase, Powder metallurgy, Sintering, Young’s Modulus

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