Controlling Factors for the Brittle-to-Ductile Transition in Tungsten Single Crystals
- 13 November 1998
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 282 (5392) , 1293-1295
- https://doi.org/10.1126/science.282.5392.1293
Abstract
Materials performance in structural applications is often restricted by a transition from ductile response to brittle fracture with decreasing temperature. This transition is currently viewed as being controlled either by dislocation mobility or by the nucleation of dislocations. Fracture experiments on tungsten single crystals reported here provide evidence for the importance of dislocation nucleation for the fracture toughness in the semibrittle regime. However, it is shown that the transition itself, in general, is controlled by dislocation mobility rather than by nucleation.Keywords
This publication has 19 references indexed in Scilit:
- Brittle-to-ductile transition in NiAl single crystalActa Materialia, 1998
- Three-Dimensional simulation of dislocation-crack interactions in b.c.c. metals at the mesoscopic scaleActa Materialia, 1996
- Cleavage Anisotropy in Tungsten Single CrystalsPhysical Review Letters, 1996
- Fracture studies of tungsten single crystalsMaterials Letters, 1994
- Dislocation Screening and the Brittle-to-Ductile Transition: A Kosterlitz-Thouless Type InstabilityPhysical Review Letters, 1994
- Quasi-equilibrium modeling of the toughness transition during semibrittle cleavageActa Metallurgica et Materialia, 1994
- Crack propagation in b.c.c. crystals studied with a combined finite-element and atomistic modelPhilosophical Magazine A, 1991
- Shielding of cracks in a plastically polarizable materialJournal of Materials Research, 1991
- The brittle-ductile transition in silicon. II. InterpretationProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1989
- The brittle–ductile transition in silicon. I. ExperimentsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1989