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Understanding the Room Temperature Recovery Behaviour in a Ti‐24Nb‐4Zr‐8Sn Superelastic Alloy

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Reed, OG 
Church, NL 
Jones, NG 


jats:pMetastable β Ti‐Nb based superelastic alloys have potential uses in the biomedical and aerospace industries due to an attractive combination of properties. However, their mechanical response can be seen to vary with cycling, limiting their uptake. Furthermore, recent studies have also highlighted changes in properties under no applied stress at room temperature, with the reasons for these changes poorly understood. To investigate potential mechanisms for these changes, the superelastic behaviour of Ti‐2448 was studied during mechanical cycling both pre‐ and post‐ room temperature aging treatments. On cycling, there was a reduction in both σjats:subSIM</jats:sub> and hysteresis area, consistent with behaviour commonly seen in the literature. However, during room temperature aging, there was a rapid, time‐dependant process leading to a partial recovery. jats:italicIn situ</jats:italic> diffraction data indicated that this recovery is coincident with a reduction in internal stresses, the potential mechanisms for which are discussed.</jats:p>jats:pThis article is protected by copyright. All rights reserved.</jats:p>



40 Engineering, 4016 Materials Engineering

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Advanced Engineering Materials

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EPSRC (2110120)
OGR would like to acknowledge support from the EPSRC and Rolls Royce through the provision of grant 2738194. NLC would like to acknowledge support from the EPSRC and the Defence Science and Technology Laboratory through the provision of an Industrial CASE studentship (EP/R511870/1). Beam time was provided by Diamond Light Source under MG33585.
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