Recrystallization Phenomena During Friction Stir Processing of Hypereutectic Aluminum-Silicon Alloy
DSpace at IIT Bombay
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Title |
Recrystallization Phenomena During Friction Stir Processing of Hypereutectic Aluminum-Silicon Alloy
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Creator |
RAO, AG
RAVI, KR RAMAKRISHNARAO, B DESHMUKH, VP SHARMA, A PRABHU, N KASHYAP, BP |
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Subject |
STRAIN RATE SUPERPLASTICITY
AL-SI ALLOYS METAL-MATRIX COMPOSITES MECHANICAL-PROPERTIES GRAIN-REFINEMENT DYNAMIC RECRYSTALLIZATION MICROSTRUCTURE TEMPERATURE BEHAVIOR PERFORMANCE |
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Description |
Microstructural evolution and related dynamic recrystallization phenomena were investigated in overlapping multipass friction stir processing (FSP) of hypereutectic Al-30 pct Si alloy. FSP resulted in the elimination of porosities along with the refinement of primary silicon particles and alpha aluminum grains. These alpha aluminum grains predominantly exhibit high angle boundaries with various degrees of recovered substructure and dislocation densities. The substructure and grain formation during FSP take place primarily by annihilation and reorganization of dislocations in the grain interior and at low angle grain boundary. During multipass overlap FSP, small second phase particles were observed to form, which are accountable for pinning the grain boundaries and thus restricting their growth. During the multipass overlap FSP, the microstructure undergoes continuous dynamic recrystallization by formation of the subgrain boundary and subgrain growth to the grain structure comprising of mostly high angle grain boundaries.
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Publisher |
SPRINGER
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Date |
2014-10-15T12:05:27Z
2014-10-15T12:05:27Z 2013 |
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Type |
Article
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Identifier |
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 44A(3)1519-1529
http://dx.doi.org/10.1007/s11661-012-1489-6 http://dspace.library.iitb.ac.in/jspui/handle/100/14860 |
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Language |
en
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