The effect of heat treatment on the mechanical properties of Ti–6Al–4V alloy produced by consolidating a high impurity blended powder mixture using a combination of powder compact hot pressing and extrusion

Abstract

Abstract

Heat Treatment, Impact Properties, and Fracture Behaviour of Ti-6Al-4V Alloy Produced by Powder Compact Extrusion

“…In addition to the comparisons with a broad spectrum of previously published data on ingot Ti-6Al-4V alloy (with oxygen 0.2 wt.%), it is also important to correlate the results from this work with research carried out previously by the author on hot-pressed and extruded material with an oxygen content of 0.44 wt.% [23]. In this work, a high-oxygen blended powder mixture was consolidated by hot-pressing a green compact prior to extrusion.…”

“…On the whole, it is clear that the levels of impact toughness given in this work match typical values stated for standard ingot grade five Ti-6Al-4V alloy with an oxygen content of 0.2 wt.%. The impact toughness is also significantly better than that for material processed by hot pressing and extrusion [23]. Hence, Ti-6Al-4V alloy with a high oxygen content ~0.34 wt.% produced in this study by PCE processing can be used for industrial applications after α + β annealing to satisfy the performance requirement of more critical applications.…”

“…A comparison of mean Charpy impact toughness of heat treated Ti-6Al-4V alloy prepared via two different processing routes with different oxygen contents [23]. …”

Investigation and optimization of heat treatment process on tensile behaviour of Ti6Al4V alloy

“…Solution heat treatment and ageing are beneficial when it is done below the β transus temperature to obtain adequate ductility, wear resistance and hardness [9,10]. Generally, mechanical properties of Ti6Al4V alloy have been observed to improve after annealing processes [11].…”

Processing, microstructure, properties and fracture behaviour of Ti–6Al–4V manufactured from pre-alloyed powder

“…In previous studies [9][10][11][12], successful manufacturing of blended elemental Ti-6Al-4V alloy from relatively high oxygen containing hydride/dehydride (HDH) titanium and master alloy powders has been demonstrated using TPC processes such as powder compact hot pressing plus extrusion or sintering plus extrusion. From mechanical property data collated to date for blended elemental Ti-6Al-4V alloy, it is clear that depending on the oxygen content, processing conditions and post-heat treatments, a reasonable balance of mechanical properties (such as strength, hardness, ductility and toughness) can be achieved [9][10][11][12]. However, in the majority of these cases, the utilisation of the corresponding material produced from blended powders might be limited to 'fit for purpose', non-critical applications, due to the effects of high oxygen.…”