Research output: Contribution to journal › Article › peer-review
The effect of temperature and strain rate on the interaction between an edge dislocation and an interstitial dislocation loop in α-iron. / Terentyev, Dmitry; Malerba, Lorenzo; Bacon, D.J.; Osetsky, Yu.N.; Van Dyck, Steven (Peer reviewer).
In: Journal of Physics: Condensed Matter, Vol. 19, No. 45, 16.10.2007, p. 456211-456224.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - The effect of temperature and strain rate on the interaction between an edge dislocation and an interstitial dislocation loop in α-iron
AU - Terentyev, Dmitry
AU - Malerba, Lorenzo
AU - Bacon, D.J.
AU - Osetsky, Yu.N.
A2 - Van Dyck, Steven
N1 - Score = 10
PY - 2007/10/16
Y1 - 2007/10/16
N2 - The influence of temperature, T , and strain rate, ˙ε, on the reaction between the 1/2[111](1¯10) edge dislocation line and a periodic row of 4 nm interstitial dislocation loops with Burgers vector b = 1/2[1¯11] in α-Fe has been investigated by means of molecular dynamics, using a potential developed recently for body centred cubic Fe (Ackland et al 2004 J. Phys.: Condens. Matter 16 1). A dislocation segment with b = [010] is formed by favourable reaction in all cases: it is sessile in the (1¯10) glide plane and leads to the formation of a screw dipole on the line under increasing stress. The mechanism controlling line breakaway and the corresponding critical stress depend mainly on T rather than ˙ε. At high T (300 and 600 K here) the length of the screw dipole is short (
AB - The influence of temperature, T , and strain rate, ˙ε, on the reaction between the 1/2[111](1¯10) edge dislocation line and a periodic row of 4 nm interstitial dislocation loops with Burgers vector b = 1/2[1¯11] in α-Fe has been investigated by means of molecular dynamics, using a potential developed recently for body centred cubic Fe (Ackland et al 2004 J. Phys.: Condens. Matter 16 1). A dislocation segment with b = [010] is formed by favourable reaction in all cases: it is sessile in the (1¯10) glide plane and leads to the formation of a screw dipole on the line under increasing stress. The mechanism controlling line breakaway and the corresponding critical stress depend mainly on T rather than ˙ε. At high T (300 and 600 K here) the length of the screw dipole is short (
KW - Fe
KW - hardening
KW - dislocation
KW - dislocation loop
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_83630
UR - http://knowledgecentre.sckcen.be/so2/bibref/4491
U2 - 10.1088/0953-8984/19/45/456211
DO - 10.1088/0953-8984/19/45/456211
M3 - Article
VL - 19
SP - 456211
EP - 456224
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 45
ER -
ID: 297615