Microstructure and characterization of titanium alloy (Ti–6Al–4V) and pur titanium prepared by PM#

Abstract

The aim of this work is to obtain surfaces with high content of beta enhancing titanium alloy by diffusion process at settled temperatures and times. Two metal alloys are selected, Niobium (Nb) and Molybdenum (Mo). In separate experiments, they are diffused over titanium alloy (Ti–6Al–4V) and over pure titanium (Ti) by using Powder Metallurgy. For this study different experiments were performed, Mo and Nb were diffused in Ti and Ti-64 samples at 1100 and 1200 ºC for 3 and 4 h, respectives. Their microstructure and some mechanical properties such as microhardness were investigated. The experiment succeeds in changing the microstructural properties of the surface of Ti and Ti–6Al–4V samples as characterized by opticla microscopy, SEM and XRD diffraction to confirm the phases obtained, beta and alpha plus beta structures are obtained. In particular, by using diffusion process at 1100 ºC for 3 h. Moreover, the experiment were simulated using DICTRA, these results were compared to the real results of the experiment. DICTRA results were reliable because they were similar to real experiment results.