A Strain-Glass Transition Observed in Au₇Cu₅Al₄ Ternary Alloys

Abstract:

Strain glass is a new type of glass state discovered recently in Ni-rich Ti-Ni ferroelastic alloys. It is formed by doping sufficient point defects such as solute atoms or alloying elements into a martensitic alloy to destroy the long range strain order generated by the diffusionless martensitic phase transformation. The strain glass was observed in an off-stoichiometric Heusler Au₇Cu₅Al₄ alloy by the mechanical spectrum analysis. The martensitic transformation was experimentally confirmed following the occurrence of strain glass transition during the cooling. It is different from the model developed mainly in Ni-Ti based alloys among which the martensitic transformation was totally suppressed once the strain glass transition takes place. We conclude that newly observed strain glass in an off-stoichiometric Au₇Cu₅Al₄ alloy belongs to one type of precursor phenomena.

• Periodical: Solid State Phenomena (Volume 184)
• Pages: 361-365
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.184.361
• Online since: January 2012
• Authors: Xue Jun Jin, M. J. Jin, J. Y. Liu, G. L. Fan
• Keywords: Martensitic Transformation (MT), Precursor Phenomena, Strain-Glass Transition

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