Intrinsic size-controlled strain hardening behavior of nanolayered Cu/Zr micropillars

Autor:	J.J. Niu, S.Y. Lei, Xuan Zhang, Sun Jinru, Junshi Zhang, Gang Liu
Rok vydání:	2012
Předmět:	Materials science Mechanics of Materials Mechanical Engineering Metallurgy Metals and Alloys General Materials Science macromolecular substances Strain hardening exponent Composite material Dislocation Condensed Matter Physics Layer thickness
Zdroj:	Scripta Materialia. 66:706-709
ISSN:	1359-6462
DOI:	10.1016/j.scriptamat.2011.12.032
Popis:	The strain hardening behavior of nanolayered Cu/Zr micropillars was studied using the microcompression technique, which revealed that both the strain hardening exponent and the strain hardening rate are controlled by the intrinsic rather than extrinsic size. The maximum strain hardening rate is observed at a layer thickness of ∼20 nm, which can be explained physically in terms of reduced dislocation storage rates. A dislocation model is modified to elucidate the dislocation storage in the nanolayered materials and predicts a critical intrinsic size below which the strain hardening rate drops off.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cef464b77a5451daae5d8f2028f7885c https://doi.org/10.1016/j.scriptamat.2011.12.032 Zobrazit plný text záznamu Full Text from ScienceDirect