Proceedings of the U.S. - Japan Workshop on Very High Temperature Structural Materials Held on 9-11 December 1998 in Turtle Bay, Hawaii.
Final technical rept. 1 Dec 98-31 Mat 99,
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF MATERIALS SCIENCE AND ENGINEERING
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The U.S. - Japan Workshop on Very High Temperature Structural Materials VHTSM was held on December 9 - 11, 1998 at Turtle Bay, HI. The objective of this workshop was to exchange information on the current state of research, development and application of very high temperature structural intermetallics and refractory compounds. For the purposes of this meeting, very high temperature structural materials were defined as systems with the potential to operate at temperatures in excess of l2OO deg C. A second workshop objective was to identity key areas of common interest where collaborations could significantly advance the state of these materials. Finally, participate identified critical engineering challenges and scientific issues likely to limit the understanding development and iniplementation of this class of very high temperature materials into structural engineering systems. Contained in this volume are extended abstracts that cover the topics addressed by each speaker. Classes of materials discussed in the workshop included refractory metal silicides, Nb based compounds including Laves phases and higher temperature B2 and L12 aluminides. A number of speakers also addressed fandamental problems common to these systems, including prediction of crystal structures, modeling of physical properties and defect structures, solid solution strengthening, effects of microstructural scale and architecture on fatigue and fracture and potential limitations of toughening mechanisms under cyclic loading conditions. Much of the research aimed at this class of very high temperature structural materials, though detailed in individual investigations, could be characterized as exploratory compared to breadth of potential alloying opportunities.
- Metallurgy and Metallography