High-temperature superelasticity of Ni50.6Ti24.4Hf25.0 shape memory alloy

SCRIPTA MATERIALIA

卷:101

Article

Patriarca, Luca¹  Sehitoglu, Huseyin¹ 

[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

关键词: Shape memory;    Pseudoelasticity;    Digital image correlation;    Differential scanning calorimetry;   

DOI  :  10.1016/j.scriptamat.2015.01.005

来源: Elsevier

【 摘 要 】

Changes in transformation temperatures and high-temperature mechanical behavior of the new Ni50.6Ti34.4Hf25.0 alloy were determined after selected aging treatments. Differential scanning calorimetry was used to compare the homogenized, solution-treated and aged specimens for a wide combination of aging temperatures and times. Isothermal deformation experiments were conducted measuring reversible transformation strains with digital image correlation. Extraordinary superelasticity was found at test temperatures up to 300 degrees C for the specimen aged at 500 degrees C for 4 h. 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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