Ductile ordered intermetallic alloys

Journal Article · Fri Nov 09 04:00:00 EST 1984 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.226.4675.636· OSTI ID:6223227

Liu, C T; Stiegler, J O

Many ordered intermetallic alloys have attractive high-temperature properties; however, low ductility and brittle fracture limit their use for structural applications. The embrittlement in these alloys is mainly caused by an insufficient number of slip systems (bulk brittleness) and poor grain-boundary cohesion. Recent studies have shown that the ductility and fabricability of ordered intermetallics can be substantially improved by alloying processes and control of microstructural features through rapid solidification and thermomechanical treatments. These results demonstrate that the brittleness problem associated with ordered intermetallics can be overcome by using physical metallurgical principles. Application of these principles will be illustrated by results on Ni/sub 3/Al and Ni/sub 3/V-Co/sub 3/V-Fe/sub 3/V. The potential for developing these alloys as a new class of high-temperature structural materials is discussed.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6223227
• Journal Information: Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 226; ISSN SCIEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
COBALT ALLOYS
CRYSTAL STRUCTURE
DUCTILITY
FABRICATION
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
PHASE TRANSFORMATIONS
SOLIDIFICATION
TENSILE PROPERTIES
VANADIUM ALLOYS