Mechanical properties and microstructure of powder metallurgy Ti–xNb–yMo alloys for implant materials

In this study, a series of Ti–xNb–yMo (x=5–40wt.% in 5wt.% increments; and y=3, 5, 10 wt.%) alloys were fabricated by powder metallurgy and studied with respect to their microstructures, compressive mechanical properties and hardness. Increases in Nb and Mo content led to decreases in compressive an...

Full description

Saved in:
Bibliographic Details
Published in:Materials & design 2015-12, Vol.88, p.1164-1174
Main Authors: Nazari, Keivan A., Nouri, Alireza, Hilditch, Tim
Format: Article
Language:English
Subjects:
Biomedical implant
Compressive behaviour
Elastic modulus
Hardness
Microstructure
Molybdenum
Niobium
Powder metallurgy
Titanium alloys
Titanium base alloys
Widmanstatten structure
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, a series of Ti–xNb–yMo (x=5–40wt.% in 5wt.% increments; and y=3, 5, 10 wt.%) alloys were fabricated by powder metallurgy and studied with respect to their microstructures, compressive mechanical properties and hardness. Increases in Nb and Mo content led to decreases in compressive and yield strengths, elastic modulus and hardness of the sintered alloys. Among the studied alloys, Ti–10Nb–3Mo alloy exhibited the optimum combination of strength and ductility. Alloys with a lower amount of Nb (≤25wt.%) and Mo (≤5wt.%) developed Widmanstätten structure, while further increase in Nb and Mo additions led to the microstructure predominantly consisting of β phase with varying regions of α+β phase. The effects of sintering temperature on elastic modulus and hardness were also investigated for Ti–xNb–3Mo alloys. •Nb and Mo levels inversely proportional to elastic modulus and compressive strength•Elastic modulus was dependent on both porosity levels and β-phase content.•Increased sintering temperature improved mechanical properties via lower porosity. [Display omitted]
ISSN:0264-1275
1873-4197
DOI:10.1016/j.matdes.2015.09.106