Due to the long electron mean free path, the bending of electron trajectories by the dislocation potential may be substantial and this manifests itself on the plastic properties of metals. We study this nonlinear effect in the case when a strong magnetic field H is applied along the axis of ...
Atomic-scale computer simulation techniques have been used to investigate the interaction of crystal dislocations with two interfaces in hexagonal-close-packed (h.c.p.) metals, namely the {1012} twin boundary and a 〈1210〉/90° tilt boundary which is incommensurate in the direction perpendicular ...
type metals are analyzed by a finite element technique and the density distribution of the geometrically necessary dislocations is evaluated. Results show development of wall like structure of dislocations in some of single crystals and also dislocation half loops within grains and their pile up at ...
Single phase FeCoCrMnNi was demonstrated to show fracture-toughness values above 200 MPa m1/2 12, which exceeds the toughness of virtually all pure metals and alloys. Al-rich HEAs in the Al-Co-Cr-Fe-Ni alloy system with a B2 ordered matrix structure, the topic of the present report...
The writers are with the Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tenn. 37830 Supported by the United States Atomic Energy Commission under contract with the Union Carbide Corporation. Publication History Issue published online: 2 JUN 2006 Article first published online...
This process, which is temperature and strain-rate dependent, is prolific in BCC metals due to the fact that 〈111〉 screw dislocations can glide on any of the following slip systems: three {110} planes, three {112} planes and six {123} planes13. On the other hand, edge dislocations...
Clusters of self-interstitial atoms (SIAs) in the form of parallel crowdions are created directly in high-energy displacement cascades produced in metals by neutron irradiation. They are equivalent to small perfect dislocation loops and, in isolation in pure metals, undergo fast thermally-activated ...
2023, International Journal of Refractory Metals and Hard Materials Citation Excerpt : Noticeably, the crystallographic orientation relationships in 1Ge and 9Ge alloys are ascribed to the difference in preferred growth orientation of Nbss and β-Nb5Si3 during solidification process. The preferred growth ...
Dislocation and grain-boundary processes contribute significantly to plastic behaviour in polycrystalline metals, but a full understanding of the interaction between these processes and their influence on plastic response has yet to be achieved. The coupled atomistic discrete-dislocation method is used to ...
Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals Z.-H. Jin a,b, * , P. Gumbsch c , K. Albe d , E. Ma e , K. Lu f , H. Gleiter a , H. Hahn a a Forschungszentrum Karlsruhe, Institut fu¨ r Nanotechnologie, Karlsruhe ...