Publikacje

Abstract:

The tensile properties at elevated temperatures (780, 800 and 820 °C) for the laminated
CuAl10Fe3Mn2-intermetallics composites have been investigated. The bronze-intermetallics
laminated composites were transformation superplastic at 800 °C. When the initial strain-rate was
0.7 × 10−3 s−1 fracture elongation of 455% was achieved. An excursion through the transformation
range → and back → 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 ironrich
particles and grew along the force axis. At 780 and 820 °C, the expected superplastic behavior
of laminated composites was not realized because  and  phase grains were too coarse to allow
deformation by grain-boundary sliding through microstructural superplasticity and cracking in the
intermetallic layers began.

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Transformation superplasticity of laminated CuAl10Fe3Mn2 bronze-intermetallics composites