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Descripción
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| Generally, AA6061 is used in a wide range of applications, including cryogenic applications requiring high toughness. Friction Stir Processing technique was investigated for inducing directed and localized properties in cast AA6061. It was envisaged to set up reproducible practical operational windows for modifying of thick cast pieces, demonstrating substantially improved microstructural, mechanical and formability properties. Firstly, the paper introduces FSP fundamental parameters as advancing and rotating tool speed, approaching their influence on the processed material and surface roughness of AA6061. Single and overlapped friction stir processed layers were considered for the microstructural, hardness and surface roughness analysis. Different microstructural zones have been identified: the nugget region experiencing intense plastic deformation and high temperature exposure being characterized by fine and equiaxed recrystallized grains, the thermo-mechanically affected region experiencing medium temperature and deformation having deformed and un-recrystallized grains, and the heat affected zone experiencing only temperature, characterized by precipitate coarsening. Hardness distribution on single and overlapped layers was investigated. Transient and quasy-stationary phases of FSP were revealed by roughness mapping. | |
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Internacional
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JCR del ISI
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Título de la revista
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Welding in the World |
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ISSN
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0043-2288 |
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Factor de impacto JCR
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0 |
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DOI
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Número de revista
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0 |
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