Nanoindentation studies of yield point phenomena on gold single crystals

S. G. Corcoran, R. J. Colton, E. T. Lilleodden, W. W. Gerberich

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Nanoindentation studies often show an instantaneous displacement-excursion in the load-displacement curve. This anomaly is generally associated with a surface contamination effect, dislocation emission, a phase transition, or an oxide break-through event. The determination of which effect is operative is often difficult when investigating oxide covered surfaces. We have performed a detailed nanoindentation study on clean, flame annealed single-crystal Au thus eliminating the effects of a surface oxide or contamination layer. Multiple displacement excursions were observed exhibiting a new phenomenon of 'staircase' yielding. Owing to the fact that our radius of contact is more than an order of magnitude smaller than the average dislocation spacing expected for well annealed Au, the excursions are explained in terms of multiple dislocation nucleation events on parallel slip bands. Indentation data were taken on Au (111), (110), and (100) single crystal surfaces.

Original languageEnglish (US)
Title of host publicationThin Films
Subtitle of host publicationStresses and Mechanical Properties VI
DOIs
StatePublished - Jan 1 1996
EventProceedings of the 1996 MRS Spring Meeting - San Francisco, CA, USA
Duration: Apr 8 1996Apr 11 1996

Publication series

NameMaterials Research Society Symposium - Proceedings
Volume436
ISSN (Print)0272-9172

Other

OtherProceedings of the 1996 MRS Spring Meeting
CitySan Francisco, CA, USA
Period4/8/964/11/96

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    Corcoran, S. G., Colton, R. J., Lilleodden, E. T., & Gerberich, W. W. (1996). Nanoindentation studies of yield point phenomena on gold single crystals. In Thin Films: Stresses and Mechanical Properties VI (Materials Research Society Symposium - Proceedings; Vol. 436). https://doi.org/10.1557/proc-436-159