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Titolo:
The early stages of plastic yielding in polycrystalline gold thin films
Autore:
Owusu-Boahen, K; King, AH;
Indirizzi:
Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA Purdue Univ W Lafayette IN USA 47907 Mat Engn, W Lafayette, IN 47907 USA SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA SUNY Stony Brook Stony Brook NY USA 11794 Engn, Stony Brook, NY 11794 USA
Titolo Testata:
ACTA MATERIALIA
fascicolo: 2, volume: 49, anno: 2001,
pagine: 237 - 247
SICI:
1359-6454(20010122)49:2<237:TESOPY>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEM;
Keywords:
yield phenomena; thin films; triple junctions; grain boundaries;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: King, AH Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA Purdue UnivW Lafayette IN USA 47907 , W Lafayette, IN 47907 USA
Citazione:
K. Owusu-Boahen e A.H. King, "The early stages of plastic yielding in polycrystalline gold thin films", ACT MATER, 49(2), 2001, pp. 237-247

Abstract

We present transmission electron microscope observations of the effects ofstress in polycrystalline gold thin films. The films exhibit a very strong{111} fiber texture, and are loaded in biaxial tensile stress. Under theseconditions, each grain exhibits the same Schmid factor, within a very small variance. Despite the identical loading conditions and resolved shear stresses from grain to grain, we observe that yield is isolated in only a few grains. Yield initiates only at specific triple junctions. and we identify the conditions required for a triple junction to be active in this manner. The required conditions for yield to occur at a triple junction include (1)an appropriate slip-plane inclination relative to the grain boundaries at the junction; and (2) at least one grain boundary of appropriate character,adjacent to the slip plane specified in item 1. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 29/09/20 alle ore 23:10:01