Effects of friction stir processing on the thermal conductivity of a strain-hardened Al-Mg alloy
| Autor: | Sung-Tae Hong, Kwang-Jin Lee, Md. Abu Mowazzem Hossain, Kyung-Sik Han, Heung Nam Han, Juwon Park, Yong-Ha Jeong |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Friction stir processing Mechanical Engineering Alloy Metallurgy Recrystallization (metallurgy) engineering.material Industrial and Manufacturing Engineering Grain size Grain growth Thermal conductivity engineering Grain boundary Electrical and Electronic Engineering Electron backscatter diffraction |
| Zdroj: | International Journal of Precision Engineering and Manufacturing. 16:1969-1974 |
| ISSN: | 2005-4602 2234-7593 |
| DOI: | 10.1007/s12541-015-0256-1 |
| Popis: | Strain-hardened aluminum-magnesium alloy (aluminum 5052-H112 alloy) plates are successfully friction stir processed. The thermal conductivity of the FSPed aluminum alloy is consistently measured to be higher than that of the base metal, even though the amount of grain boundaries significantly increases in the FSPed zone due to grain size refinement by FSP as observed by electron back-scatter diffraction (EBSD) analysis. In terms of thermal conductivity of the selected strain-hardened aluminum alloy, the result suggests that the effect of reduced dislocation by recrystallization, which is confirmed by X-ray diffraction analysis, surpasses the effect of increased grain boundaries due to grain size refinement. As the tool rotation speed increases, the thermal conductivity of the FSPed aluminum alloy increases even more, since the dislocation density in FSPed zone decreases further while the effect of grain size refinement is diminished by a slight grain growth. |
| Databáze: | OpenAIRE |
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