Computational thermodynamics of the CoNiGa high temperature shape memory alloy system Academic Article

abstract

• The CoNiGa ternary system has recently emerged as a promising alternative to currently used high temperature Shape Memory Alloys (SMAs), with possible applications in the aerospace and automotive industries. In this work, we use thermodynamic modeling based on the CALPHAD approach to investigate the thermodynamic properties, phase stability and shape memory properties of these alloys. The thermodynamic model parameters have been obtained by fitting experimental and ab initio data. The stability of the phase at high temperatures was enforced accurately by remodeling the CoGa system. Also, the phase stabilities of Ni5Ga3 () and Ni13Ga9 () were determined as they are known to cause detrimental effects in the ternary at low temperatures. 2013 Elsevier Ltd.

authors

• Arroyave, Raymundo
• Karaman, Ibrahim

published proceedings

• CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY

author list (cited authors)

• Chari, A., Dogan, E., Talapatra, A., Chivukula, A. R., Garay, A., Karaman, I., & Arroyave, R.

citation count

• 4

complete list of authors

• Chari, Arpita||Dogan, Ebubekir||Talapatra, Anjana||Chivukula, Avinash R||Garay, Andres||Karaman, I||Arroyave, R

publication date

• June 2014

publisher

• Elsevier  Publisher

published in

• CALPHAD: the international research journal for calculation of phase diagrams  Journal

keywords

• CALPHAD
• CoNiGa
• Computational Modeling
• First-principles Calculations
• SMA
• Thermodynamics

Digital Object Identifier (DOI)

• 10.1016/j.calphad.2013.12.005

URI

• https://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9881

start page

• 167

end page

• 177

volume

• 45

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.calphad.2013.12.005