| Autor: |
M. Konieczny |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
AIMS Materials Science. 7:312-322 |
| ISSN: |
2372-0484 |
| Popis: |
The tensile properties at elevated temperatures (780, 800 and 820 ℃) for the laminated CuAl10Fe3Mn2-intermetallics composites have been investigated. The bronze-intermetallics laminated composites were transformation superplastic at 800 ℃. When the initial strain-rate was 0.7 × 10-3 s-1 fracture elongation of 455% was achieved. An excursion through the transformation range α→β and back β→α resulted in a finite, irreversible strain increment on each thermal cycle. These strains were accumulated without fracture of intermetallic layers. A small amount of cavities were formed during superplastic deformation of aluminum bronze which were nucleated at the iron-rich particles and grew along the force axis. At 780 and 820 ℃, the expected superplastic behavior of laminated composites was not realized because α and β phase grains were too coarse to allow deformation by grain-boundary sliding through microstructural superplasticity and cracking in the intermetallic layers began. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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