Effect of Heat-treatment Conditions on Microstructure and Shape Memory Properties of Ti–4.5Al–3V–2Fe–2Mo Alloy
The effect of heat treatment conditions on microstructure and superelasticity of Ti–4.5Al–3V–2Fe–2Mo (mass%) alloy was investigated by scanning electron microscopy with electron backscattered diffraction (SEM/EBSD) and loading-unloading tensile tests. The presence or absence of solution treatment (ST) at 1223 K before heat treatment at 1073 K was considered. The SEM analysis showed that the specimen without solution treatment had globular α and β grains while the solution-treated specimen had needle-shaped α in coarsened β grains. The loading-unloading tensile tests revealed that the stress for inducing martensitic transformation and shape recovery strain were almost the same in both the specimens, although the grain sizes of β austenite were significantly different.
KeywordsSuperelasticity Alpha + beta titanium alloy SP-700 Texture Heat-treatment
- 1.Ogawa A, Fukai H, Minakawa K, Ouchi C (1993) Beta titanium alloys in the 1990’s. The Minerals, Metals & Materials Society, pp 513–524Google Scholar
- 2.Ishikawa M, Kuboyama O, Niikura M, Ouchi C (1993) Titanium’92 science and technology. The Minerals & materials Society, pp 141–148Google Scholar
- 4.Tobe H, Sato E (2016) Proceedings of the 13th world conference on titanium. The Minerals, Metals & Materials Society, pp 1577–1580Google Scholar