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Growth of a brittle crack (001) in 3D bcc iron crystal with a Cu nano-particle
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SYSNO ASEP 0421102 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Growth of a brittle crack (001) in 3D bcc iron crystal with a Cu nano-particle Author(s) Uhnáková, Alena (UT-L) RID, ORCID
Machová, Anna (UT-L) RID, ORCID
Hora, Petr (UT-L) RID, ORCID
Červená, Olga (UT-L)Source Title Computational Materials Science. - : Elsevier - ISSN 0927-0256
Roč. 83, February (2014), s. 229-234Number of pages 6 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords brittle crack extension ; 3D ; mode I ; bcc iron ; Cu nano-particle ; molecular dynamics ; acoustic emission Subject RIV JG - Metallurgy R&D Projects GA101/09/1630 GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000329400700034 EID SCOPUS 84889680064 DOI 10.1016/j.commatsci.2013.10.037 Annotation Paper deals with crack extension under mode I in a 3D crystal of bcc iron with a small Cu inhomogeneity in front of the crack via 3D atomistic simulations by molecular dynamics. The results show that after fast Cu penetration crack extension differs from that in pure bcc iron. While in pure bcc Fe the crack front remains straight during brittle crack extension, in the Fe-Cu crystal crack front wave of the type 3/2 l arises, modulated by shorter atomic waves. Wave minimum is at Cu-particle since Cu retards locally the crack due to changes in the stress field after the penetration. As a consequence, acoustic emission on crack faces is corrugated as well. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2014
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