ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Constant strain rate molecular dynamics simulations under the modified boundaryconditions were performed to elucidate the interaction processes between the kink motion of screwdislocation and the glissile self-interstitial atom cluster loops in bcc Fe by using an EAM potentialfor Fe fitted to ab initio forces. The junction formation and the helical dislocation mechanismswere identified as two possible interaction processes. In the junction mechanism, the initial Burgersvector 1/2〈111〉 of the cluster loop was transformed into 〈100〉. In the helical dislocationmechanism first the absorption, followed by the formation of the helical dislocation and theemission of the cluster loop through Hirsch mechanism was observed. Substantial hardening wasseen as result of the interactions. The stress-strain plots obtained for different loop sizes,temperature and strain rates were used to estimate the strengthening factors
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.139.59.pdf
