In Situ Neutron Diffraction Study of NiTi–21Pt High-Temperature Shape Memory Alloys

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• 作者：O. Benafan ; D. J. Gaydosh ; R. D. Noebe ; S. Qiu…
• 关键词：High ; temperature shape memory alloy ; NiTiPt ; Neutron diffraction ; Texture
• 刊名：Shape Memory and Superelasticity
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：2
• 期：4
• 页码：337-346
• 全文大小：2256KB
• 刊物类别：Characterization and Evaluation of Materials;
• 刊物主题：Characterization and Evaluation of Materials;
• 出版者：Springer International Publishing
• ISSN：2199-3858
• 卷排序：2

文摘

In situ neutron diffraction was used to investigate the microstructural features of stoichiometric and Ti-rich NiTiPt high-temperature shape memory alloys with target compositions of Ni₂₉Ti₅₀Pt₂₁ and Ni_28.5Ti_50.5Pt₂₁ (in atomic percent), respectively. The alloys’ isothermal and thermomechanical properties (i.e., moduli, thermal expansion, transformation strains, and dimensional stability) were correlated to the lattice strains, volume-averaged elastic moduli, and textures as determined by neutron diffraction. In addition, the unique aspects of this technique when applied to martensitic transformations in shape memory alloys are highlighted throughout the paper.