TY - JOUR
T1 - Atomistic simulation of the influence of Cr on the mobility of the edge dislocation in Fe(Cr) alloys
AU - Hafez Haghighat, S.M.
AU - Terentyev, Dmitry
AU - Schäublin, R.
A2 - Malerba, Lorenzo
N1 - Score = 10
PY - 2011/2/1
Y1 - 2011/2/1
N2 - In this work Fe–Cr compounds, as model alloys for the ferritic base steels that are considered as main candidates for the structural materials of the future fusion reactors, are studied using molecular dynamics simulations. The Cr or so-called α′ precipitates, which are obstacles to dislocations, affect mechanical properties, leading to hardening and loss of ductility. The flow stress to move an edge dislocation in a Cr solid solution in pure Fe is studied as a function of Cr content. The strength of a nanometric Cr precipitate as obstacle to an edge dislocation in pure Fe is investigated as a function of its Cr content. Results show that with increasing Cr content the precipitate obstacle strength increases, with a strong sensitivity to the local atomic order. Temperature induces a monotonic decrease of the flow stress of the Cr solid solution and of the Cr precipitate obstacle strength.
AB - In this work Fe–Cr compounds, as model alloys for the ferritic base steels that are considered as main candidates for the structural materials of the future fusion reactors, are studied using molecular dynamics simulations. The Cr or so-called α′ precipitates, which are obstacles to dislocations, affect mechanical properties, leading to hardening and loss of ductility. The flow stress to move an edge dislocation in a Cr solid solution in pure Fe is studied as a function of Cr content. The strength of a nanometric Cr precipitate as obstacle to an edge dislocation in pure Fe is investigated as a function of its Cr content. Results show that with increasing Cr content the precipitate obstacle strength increases, with a strong sensitivity to the local atomic order. Temperature induces a monotonic decrease of the flow stress of the Cr solid solution and of the Cr precipitate obstacle strength.
KW - Dislocations
KW - Cr precipitation
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_117595
UR - http://knowledgecentre.sckcen.be/so2/bibref/8575
U2 - 10.1016/j.jnucmat.2011.01.087
DO - 10.1016/j.jnucmat.2011.01.087
M3 - Article
SN - 0022-3115
VL - 417
SP - 1094
EP - 1097
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -