Zobrazeno 1 - 10
of 53
pro vyhledávání: '"R. G. Hoagland"'
Autor:
R. G. Hoagland, R. J. Kurtz
Publikováno v:
Philosophical Magazine A. 82:1073-1092
Publikováno v:
Philosophical Magazine A. 82:643-664
Autor:
J. P. Hirth R. G. Hoagland
Publikováno v:
Philosophical Magazine A. 78:529-532
Autor:
J. P. Hirth, R. G. Hoagland
Publikováno v:
Philosophical Magazine A. 78:529-532
The dissociation of dislocations into partials bounding an extrinsic stacking fault is studied in an atomistic simulation of aluminium. An embedded-atom-type potential is employed. Of two possible extended configurations, one retains an extrinsic sta
Publikováno v:
Metallurgical and Materials Transactions A. 29:2033-2038
For phase transformations with well-defined terrace planes, interface motion can occur by the motion of ledges or disconnections (ledges with added dislocation character). Symmetry imposes restrictions on the nature of these defects and may lead to t
Publikováno v:
Scripta Materialia. 39:451-456
The interactions of dislocations with grain boundaries are fundamental unit processes of crystal plasticity, and a detailed knowledge of these processes is crucial to the quantitative understanding of mechanical behavior of materials. There have been
Publikováno v:
Modelling and Simulation in Materials Science and Engineering. 6:9-18
The stress dependence of a lock consisting of a stair rod symmetrically located between two Shockley partials in face-centred cubic nickel was examined by atomistic simulation. The applied stress forced the partials into the stair rod. As the partial
Autor:
Richard C. Hugo, R. G. Hoagland
Publikováno v:
Scripta Materialia. 38:523-529
Liquid metal embrittlement (LME) occurs when some solids contact certain liquid metals. Normally ductile materials will exhibit brittle fracture behavior because of interactions between the solid metal and adsorbed liquid atoms. The fracture characte
Autor:
R. G. Hoagland
Publikováno v:
Philosophical Magazine A. 76:543-563
Dislocations are observed to emit from crack tips in atomic simulations of fcc metals as Shockley partials. The crystallographic anisotropy associated with emission as partials relative to perfect dislocations is discussed. The stress intensity neede
Autor:
R. G. Hoagland
Publikováno v:
Journal of Materials Research. 9:1805-1819
A method that determines the work done in shearing atom pairs straddling the slip plane, Φ, during emission of dislocations from a crack tip in an atomic model is presented. The model is based on an EAM-type potential for nickel. The dislocations ar