MECHANICAL AND WEAR BEHAVIOUR OF SOLUTION TREATED Ti-6Al-4V ALLOY

Document Type : Original Article

Authors

1 Associate professor, Manufacturing Technology Dept., CMRDI, Cairo, Egypt.

2 Lecturer, GUC, Cairo, Egypt.

Abstract

ABSTRACT
Microstructural evaluation and wear characteristics of solution treated Ti-6Al-4V alloy
have been investigated. The material was produced using vacuum induction furnace
and then applying hot rolling at 900 °C to reduce the samples thickness from 30 to
12 mm. One part of the material was water-quenched from a temperature above -
transus at 1100 °C/60 min. to produce a beta lamellar microstructure imbedded in
some alpha phase. The other part was water quenched from a temperature below -
transus at 950 °C/60 min. to generate an equiaxed microstructure. The fine lamellar
structure resulted in ultimate strength and wear resistance significantly superior to
the equiaxed microstructure. The overall best combination of hardness, tensile
properties, and wear resistance of the studied Ti-6Al-4V is achieved by solution
treatment at 1100 °C/60 min. and the lowest values were obtained for the as-cast
structure due to the heterogeneity in structure and large grain size that ranged from
350 to 50 μm.

Keywords