Textural Modifications during Recovery in Ti-Rich Ni-Ti Shape Memory Alloy Subjected to Low Level of Cold Work Reduction

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Abstract

In shape memory alloys (SMA), the texture can be an interesting factor influencing the anisotropic physical and mechanical characteristics during the phase transformations. It is well known that the texture significantly influences the stress-strain curve and shape memory strain of NiTi SMA. The aim of the present experiment was to analyze the textural modifications in the Ti-rich Ni-Ti SMA after annealing at moderate (500 degrees C for 30 min) and subsequent low level of cold work reduction (10% thickness reduction). The textural results were obtained by X-Ray Diffraction (XRD) during thermal cycling in three points: (i) at room temperature (B19' phase, after cold work), (ii) at 180 degrees C (B2 phase), and (iii) at room temperature (B19' phase, after cooling from 180 degrees C). The phase transformations were characterized by Differential Scanning Calorimetry (DSC) and XRD.
Original languageUnknown
Title of host publicationADVANCED MATERIALS FORUM V, PT 1 AND 2 . Book Series: Materials Science Forum
Pages618-623
Volume636-637
Publication statusPublished - 1 Jan 2010
Event5th International Materials Symposium/14th Conference of the Sociedade-Portuguesa-de-Materiais -
Duration: 1 Jan 2009 → …

Conference

Conference5th International Materials Symposium/14th Conference of the Sociedade-Portuguesa-de-Materiais
Period1/01/09 → …

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