SYMPOSIA PAPER Published: 01 January 1988

Microstructure and Property Relationships in Oxide Dispersion Strengthened Alloys


Control of the thermomechanical processing parameters and recrystallization response of oxide dispersion strengthened (ODS) alloys is required to obtain the very high temperature properties unique to these materials. Useful strength is retained up to a relatively high fraction of the melting point due to the presence of fine uniformly dispersed, stable oxide particles. In this paper the factors affecting the development of microstructures to meet desired property goals will be discussed. The effects of powder structure, pre-cursor grain size, directional recrystallization, grain aspect ratio, γ/γ' phase proportions, dispersoid content, and texture on properties will be reviewed. Long-term stress and creep rupture data will be discussed in terms of the corresponding microstructural changes. Such studies offer an insight into our understanding of the complex and unusual creep behavior in certain ODS alloys. These and other structure-property relationships will be addressed which offer significant practical applications.

Author Information

Benn, RC
Inco Alloys International, Inc., Huntington, WV
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Developed by Committee: E04
Pages: 238–268
DOI: 10.1520/STP29131S
ISBN-EB: 978-0-8031-5050-8
ISBN-13: 978-0-8031-0985-8