Microstructure Evolution of Co38Ni34Al28-Xsix (x=1, 3, 5, 7, 9) Magnetic Shape Memory Alloys

Author

Jia-Jia Su

Author_Institution

Guangdong Eng. Polytech., Guangzhou, China

fYear

2014

fDate

25-26 Oct. 2014

Firstpage

373

Lastpage

377

Abstract

The effects of adding Si to Co₃₈Ni₃₄Al₂₈ alloys on microstructure is investigated using optical microscopy (OM). Results show that the substitution Si for Al helps to reduce the volume fraction of γ precipitation and increase the martensitic transformation temperature. The increase of heat treatment temperature enhances solid solubility of γ phase in β phase matrix. The appropriate heat treatment results in homogenizing microstructure and enhancing the shape memory effect.

Keywords

aluminium alloys; cobalt alloys; heat treatment; martensitic transformations; nickel alloys; optical microscopy; precipitation; shape memory effects; silicon alloys; solid solubility; ß phase matrix; γ precipitation; Co₃₈Ni₃₄Al_28-xSi_x; heat treatment; homogenizing microstructure; magnetic shape memory alloys; martensitic transformation temperature; microstructural property; optical microscopy; solid solubility; volume fraction; Heat treatment; Microstructure; Shape; Shape memory alloys; Silicon; Temperature; ferromagnetic shape memory alloys; martensitic transformation; microstructure;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Computation Technology and Automation (ICICTA), 2014 7th International Conference on

Conference_Location

Changsha

Print_ISBN

978-1-4799-6635-6

Type

conf

DOI

10.1109/ICICTA.2014.97

Filename

7003560