Crystallography and mechanism of the formation of AuCuII plates in equiatomic Au-Cu alloy

B. C. Muddle, J. F. Nie, G. R. Hugo

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

The ordered AuCuII plates, formed during isothermal aging of equiatomic AuCu alloy, have a form and substructure in which the lattice invariant shear (LIS) produces a twinned product structure. Transmission electron microscopy measurements confirmed that the twinning is an appropriate variant required by the crystallographic theory and fractional twinning shear is consistent with the LIS required to ensure irrational habit plane is macroscopically invariant. Two variants of the superlattice structure of AuCu are within the individual twin variants and defining a domain substructure that develops after an initial formation of the twinned product. This may be interpreted to imply the existence of an intermediate product structure that is tetragonal.

Original languageEnglish
Pages445-454
Number of pages10
Publication statusPublished - 1 Jan 1998
EventProceedings of the 1996 International Conference on Displacive Phase Transformations and their Applications in Materials Engineering - Urban, United States of America
Duration: 8 May 19969 May 1996

Conference

ConferenceProceedings of the 1996 International Conference on Displacive Phase Transformations and their Applications in Materials Engineering
CountryUnited States of America
CityUrban
Period8/05/969/05/96

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