Dynamic strain aging in a tungsten heavy metal

Deformation behaviour of a newer tungsten heavy alloy

“…The flow curves are found to be serrated at this temperature. This phenomena is also observed in several literatures [9,14].…”

Variation of the mechanical properties of tungsten heavy alloys tested at different temperatures

“…The changes in microhardness at these temperatures support the conclusion that dynamic strain ageing occurs in these alloys, as discussed above and reported by Refs. [11][12]14], and as it is well known, these alloys also display static strain age hardening at about the same temperature interval. It is important to note that the binder hardness does not significantly vary in these ranges, especially in 95W-3.5Ni-1.5Fe alloys.…”

“…It is readily apparent from the figure that 95W-4.5Ni-0.5Co alloys have slightly improved quasi-static mechanical properties as compared to those of 95W-3.5Ni-1.5Fe alloys. The plateau in yield and tensile strengths in 95W-4.5Ni-0.5Co alloys and especially the very slight rise after 500°C can be explained by considering the effect of the formation of precipitates at or above 500°C to 700°C as these alloys are susceptible to intermetallic phase formation and also to the effect of dynamic strain ageing (DSA), as reported earlier [11][12]14]. From the figure, it is readily apparent that intermetallic phase formation has no marked effect on the properties of these alloys.…”

The influence of mechanical milling on the properties of W–40wt.%Cu composite produced by hot extrusion

“…In this process, the billet is extruded through a die by a pressurized fluid rather than by a punch or plunger as in conventional extrusion. This slight change in principle results in significant technical advantages over the conventional process [9,10].…”