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A micromechanical study of high temperature Ti-Al powder compaction
- Source :
- Journal of Manufacturing Science and Engineering. May, 1998, Vol. 120 Issue 2, p349, 10 p.
- Publication Year :
- 1998
-
Abstract
- Process induced micro-scale evolutions can greatly influence the strength and resilience of a high temperature ceramic and intermetallic component. A micromechanical study, based on a unit cell approach, is carried out in the present work to investigate these evolutions during compaction of titanium aluminide multi-phase intermetallics at elevated temperatures. The quasi-coupled unit cell analysis can provide an avenue for investigating scalability and migratability of laboratory results to full scale productions with perturbed material compositions. Effects of various macro-scale process design considerations (e.g., tooling stiffness, spatial distribution of thermal fields) on micro-scale evolutions are investigated in detail. It has been observed that a more economic (and usually more flexible) container increases the likelihood of microcrack nucleations, while spatially non-uniform intra-particle thermal fields can be utilized to alleviate processing induced micro-cracks in the final compacted product. Possibilities for process design modifications are also discussed.
Details
- ISSN :
- 10871357
- Volume :
- 120
- Issue :
- 2
- Database :
- Gale General OneFile
- Journal :
- Journal of Manufacturing Science and Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.20822816