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Abstract

In order to optimise the hot die processes of Ti–10V–2Fe–3Al alloy, the effects of forging processes on the microstructures and mechanical properties were studied and processing maps were used to try to aid the process design. The results show that processing maps for Ti–10V–2Fe–3Al alloy exhibit three process ranges, but only the range near β transus is suitable for hot die forging of this alloy. The alloy forged at T _β −30°C has a higher strength and ductility while the alloy forged at T _β +30°C offers higher fracture resistance than the former. Process C, where the alloy was forged at T _β +30°C to form the acicular α _p and then at T _β −30°C to get globular α _p, was designed and the total amount of deformation equal to 50% was chosen. Through process C the alloy has a better combination of tensile properties and fracture resistance than any other processes because a proper mixture between globular α _p and acicular α _p is obtained.

Keywords

TI-10V-2FE-3AL HOT DIE FORGING MICROSTRUCTURE PROCESSING MAPS MECHANICAL PROPERTIES

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Optimisation of hot die forging processes of Ti–10V–2Fe–3Al alloy

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