Manda, Premkumar and Radhya, Rudra J H M and Gowri Shankar, M C and Singh, A K (2020) Microstructure, texture and mechanical properties of metastable beta titanium alloy Ti–5Al–3.5Mo–7.2V–3Cr. Advances in Materials and Processing Technologies. ISSN 2374-0698

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Abstract

The work describes a correlation among microstructure, texture and mechanical properties of a metastable β titanium alloy Ti–5Al– 3.5Mo–7.2V–3Cr (A2). The alloy A2 portrays the presence of β and ω phases in the βsolution treated and water quenched (βSTWQ)condition.TheageingofβSTWQsampleshasbeencarriedoutinsingleand two steps. The aged samples show grain boundary α, islandsα, sub boundary α and uniform distribution of α within β phase. The βphasetexturehasstrengthenedfrom550to 750°Csamples in two-step aged samples. The α phase texture is strengthened and weakenedfrom550to750°Cinsingle-andtwo-stepageing,respectively. The Vickers hardness values of the alloy A2 aged at 300 °C are significantly larger than the βSTWQ sample due to precipitation hardening. Ageing temperature has marked influence on hardness valuesin singleand two stepagedsamples. The alloy agedat550 °C exhibits high strength and low elongation values than those of the βSTWQ and 750 °C aged samples insingle-step ageing. The strength and elongation values of the alloy in two-step ageing are relatively higher than the alloy aged in 750 °C in single-step

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