Atomistic simulations of dislocation–precipitate interactions emphasize importance of cross-slip

Autor:	Chandra Veer Singh, Derek H. Warner, Arturo J. Mateos
Rok vydání:	2011
Předmět:	Work (thermodynamics) Crystallography Molecular dynamics Materials science Precipitation hardening Mechanics of Materials Mechanical Engineering Metals and Alloys Thermodynamics General Materials Science Cross Slip Dislocation Condensed Matter Physics
Zdroj:	Scripta Materialia. 64:398-401
ISSN:	1359-6462
Popis:	This work examines the interaction of screw dislocations with Guinier–Preston (GP) zones using atomistic simulations. Both Orowan looping and cross-slip mechanisms are found to control the interactions. Cross-slip, occurring both at zero and finite temperatures, is found to either significantly reduce or enhance precipitate strengthening, depending upon the orientation of the dislocation–GP zone interaction. The orientation dependence, and its dependence on temperature, provides a micromechanical explanation for the experiments of Muraishi et al. (Philos. Mag. A 82 (2002) 2755).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17490439231f2a3c48227bf36e1b57c6 https://doi.org/10.1016/j.scriptamat.2010.10.041 Zobrazit plný text záznamu Full Text from ScienceDirect