High-temperature superelasticity and competing microstructural mechanisms in Co49Ni21Ga30 shape memory alloy single crystals under tension Academic Article

abstract

• A large temperature range of stress-induced martensitic transformation with >8% superelastic strain is demonstrated in [1 0 0]-oriented Co49Ni21Ga30 single crystals. The nature of the superelastic response is greatly affected by temperature and test history due to the temperature-dependent dominant microstructural mechanisms. We provide an insight into these mechanisms and divide the response into three temperature stages. Interestingly, a small stress hysteresis of only 2 MPa was achieved after the superelastic experiments at 300 C compared to 20 MPa of the virgin sample. 2009 Acta Materialia Inc.

authors

• Karaman, Ibrahim

published proceedings

• SCRIPTA MATERIALIA

author list (cited authors)

• Monroe, J. A., Karaman, I., Karaca, H. E., Chumlyakov, Y. I., & Maier, H. J.

citation count

• 23

complete list of authors

• Monroe, JA||Karaman, I||Karaca, HE||Chumlyakov, YI||Maier, HJ

publication date

• March 2010

publisher

• Elsevier  Publisher

published in

• Scripta Materialia  Journal

keywords

• High-temperature Deformation
• Martensitic Phase Transformation
• Shape Memory Alloys
• Superelasticity

Digital Object Identifier (DOI)

• 10.1016/j.scriptamat.2009.11.006

start page

• 368

end page

• 371

volume

• 62

issue

• 6

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.scriptamat.2009.11.006