Compressive response of nickel-rich NiTiHf high-temperature shape memory single crystals along the [1 1 1] orientation
2011; Elsevier BV; Volume: 65; Issue: 7 Linguagem: Inglês
10.1016/j.scriptamat.2011.06.027
ISSN1872-8456
AutoresH.E. Karaca, Sayed M. Saghaian, B. Basaran, Glen S. Bigelow, R.D. Noebe, Y.I. Chumlyakov,
Tópico(s)Shape Memory Alloy Transformations
ResumoThe shape memory properties of Ni-rich NiTiHf single crystals along the [1 1 1] orientation were investigated by thermal cycling under constant stress and stress cycling at constant temperature in compression. The single crystals demonstrate stable shape memory behavior under ultrahigh stress levels (1000 MPa) with about 3% transformation strain, a maximum work output of 30 J cm−3 and nearly perfect pseudoelasticity at high temperatures (180–200 °C).
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