Defects and Diffusion in a Prototype of Shape Memory Alloys: β2' Au-Cd Alloys

Devendra Gupta; David S. Lieberman

doi:10.4028/www.scientific.net/DDF.283-286.139

Paper Titles

Steam Oxidation Behaviour of Ni-Based Alloys
p.117

Boundary Line of Microcrystallites in Amorphous and Crystalline Structures of Metallic Glasses
p.123

Diffusion in Very Dilute Zr-Fe Alloys
p.128

Evaluation of the Diffusion Coefficient of N in γ' Iron Nitride: Influence of the Nitriding Potential
p.133

Defects and Diffusion in a Prototype of Shape Memory Alloys: β₂' Au-Cd Alloys
p.139

Short Order and Hydrogen Transport in Amorphous Palladium Materials
p.149

Silver Self-Diffusion in Al₂O₃/QE22 Magnesium Alloy Matrix Composite
p.155

Potassium Self-Diffusion in Potassium Bismuth/Rare Earth Molybdate Crystals
p.161

Effects of Copper Powder Insert Layer on the Properties of Friction Welded Joints Between AlCu and AISI 4140 Structural Steel
p.166

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Defects and Diffusion in a Prototype of Shape Memory Alloys: β₂' Au-Cd Alloys

Abstract:

The Au-Cd alloys continue to be important vehicles of research for the shape memory effect involving martensitic transformations and related phenomena.They transform to a variety of martensitic structures depending on the alloy composition and thermal history. Additionally, the Au-rich alloys display rubber like behavior involving thermo-elastic memory. Defects and diffusion play important roles in determining these properties. Defects and diffusion mechanisms in the Au- 47.5 - 50.5 at.% Cd alloys are examined. Diffusion in the nanometer regime and the states of defects are found to be important contributing factors to determine the shape memory effect, the variable martensitic transformations and the rubber like behavior, which are discussed in details.