Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 9 November 1984:
Vol. 226. no. 4675, pp. 636 - 642
DOI: 10.1126/science.226.4675.636
Prev | Table of Contents | Next

Articles

Ductile Ordered Intermetallic Alloys

C. T. Liu 1 and J. O. Stiegler 2

1 Group leader of the Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830.
2 Director of the Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830.

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 Ni3Al and Ni3V-Co3V-Fe3V. The potential for developing these alloys as a new class of high-temperature structural materials is discussed.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Intermetallic Compounds for High-Temperature Structural Use.
A. I. TAUB and R. L. FLEISCHER (1989)
Science 243, 616-621
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)