Effect of precipitation on the microstructure and the shape memory response of the Ni50.3Ti29.7Zr20 high temperature shape memory alloy

abstract

• The effect of nano-precipitation on the shape memory characteristics and martensite microstructure of the Ni50.3Ti29.7Zr 20 high temperature shape memory alloy was studied. With appropriate heat treatment, the alloy shows excellent dimensional stability during thermal cycling under tension. Fine precipitates are absorbed by martensite variants and do not significantly hinder martensite formation. These alloys demonstrated higher transformation strain, smaller thermal hysteresis and narrower transformation range than samples with larger precipitates, a few hundred nanometers, that interfere with martensite variant growth. 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

authors

• Karaman, Ibrahim

published proceedings

• SCRIPTA MATERIALIA

author list (cited authors)

• Evirgen, A., Karaman, I., Noebe, R. D., Santamarta, R., & Pons, J.

citation count

• 64

complete list of authors

• Evirgen, A||Karaman, I||Noebe, RD||Santamarta, R||Pons, J

publication date

• September 2013

publisher

• Elsevier  Publisher

published in

• Scripta Materialia  Journal

keywords

• High Temperature Shape Memory Alloys
• Martensitic Transformation
• NiTiZr
• Precipitation
• Shape Memory Response

Digital Object Identifier (DOI)

• 10.1016/j.scriptamat.2013.05.006

start page

• 354

end page

• 357

volume

• 69

issue

• 5

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.scriptamat.2013.05.006