A method to enhance cyclic reversibility of NiTiHf high temperature shape memory alloys

abstract

• The effect of severe plastic deformation via equal channel angular extrusion (ECAE) at 650 C on the thermal cyclic response of the 49.8Ni-42.2Ti-8Hf (in at.%) high temperature shape memory alloy was investigated. The improved thermal cyclic stability under constant tensile stresses in the ECAEd samples was attributed to the increase in critical shear stress levels for dislocation slip, which would accompany the martensitic phase transformation, due to the microstructural refinement and increase in favorable dislocation density. 2006 Acta Materialia Inc.

authors

• Karaman, Ibrahim

published proceedings

• SCRIPTA MATERIALIA

author list (cited authors)

• Kockar, B., Karaman, I., Kim, J. I., & Chumlyakov, Y.

citation count

• 135

complete list of authors

• Kockar, B||Karaman, I||Kim, JI||Chumlyakov, Y

publication date

• June 2006

publisher

• Elsevier  Publisher

published in

• Scripta Materialia  Journal

keywords

• Equal Channel Angular Extrusion
• High Temperature Shape Memory Alloys
• NiTiHf
• Severe Plastic Deformation
• Two-way Shape Memory Effect

Digital Object Identifier (DOI)

• 10.1016/j.scriptamat.2006.02.029

start page

• 2203

end page

• 2208

volume

• 54

issue

• 12

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.scriptamat.2006.02.029