Slip, twinning and transformation in Laves phases
Intermetallic compounds are currently being widely studied as potential high-temperature structural materials. Most of these studies are on phases such as Ni{sub 3}Al, TiAl, NiAl, and Ti{sub 3}Al, which have structures that are crystallographic derivatives of fcc, bcc, or hcp structures. However, most intermetallics have more complex crystal structures, and little is known about their deformation mechanisms and mechanical properties. By far the largest class of such compounds is that of the Laves phases, AB{sub 2} compounds having three different crystal structures: C15(cubic), C14 (hexagonal), and C36 (dihexagonal). An earlier DOE-sponsored study entitled Deformation and Defects in Laves Phases'' explored the high-temperature deformation of cubic and hexagonal Laves phases, room-temperature deformation of two-phase V-Hf-Nb alloys containing substantial amounts of Laves phase, and, by TEM, the deformation-induced defects in these alloys. The present study builds on these earlier results, and has as its general goal an improved understanding of the factors influencing ductility and toughness of Laves phases, particularly at room temperature.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-90ER45426
- OSTI ID:
- 5159723
- Report Number(s):
- DOE/ER/45426-1; ON: DE92000764
- Country of Publication:
- United States
- Language:
- English
Similar Records
Deformation and defects in Laves-phase intermetallic compounds
Slip, twinning and transformation in Laves phases. Technical progress report, August 1, 1990--July 31, 1993
Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DOCUMENT TYPES
DUCTILITY
INTERMETALLIC COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
LAVES PHASES
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHASE STUDIES
PROGRESS REPORT
TENSILE PROPERTIES
TITANIUM ALLOYS
ZIRCONIUM ALLOYS