Topic
Friction stir processing
About: Friction stir processing is a research topic. Over the lifetime, 2977 publications have been published within this topic receiving 62158 citations.
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TL;DR: In this article, the mean hardness of the UFG region reaches ∼120Hv, which is more than twice as high as that of the AZ31 matrix, and the grain refinement kinetics are analyzed and the results are self-consistent.
268 citations
TL;DR: In this paper, a Mg-Al-Zn casting was subjected to friction stir processing (FSP) and subsequent aging, which resulted in significant breakup and dissolution of the coarse, network-like eutectic β-Mg17Al12 phase distributed at the grain boundaries and remarkable grain refinement, thereby improving significantly the tensile properties of the casting.
257 citations
TL;DR: In this paper, a three-step manufacturing process to fabricate complex shaped components can be envisaged: cast sheet or hot-pressed powder metallurgy sheet + friction stir processing + superplastic forging or forming.
Abstract: Friction stir processing is a new thermo-mechanical processing technique that leads to a microstructure amenable for high strain rate superplasticity in commercial aluminum alloys. Friction stirring produces a combination of very fine grain size and high grain boundary misorientation angles. Preliminary results on a 7075 Al demonstrate high strain rate superplasticity in the temperature range of 430-510 °C. For example, an elongation of >1000 % was observed at 490 °C and 1 × 10 -2 s -1 . This demonstrates a new possibility to economically obtain a superplastic microstructure in commercial aluminum alloys. Based on these results, a three-step manufacturing process to fabricate complex shaped components can be envisaged: cast sheet or hot-pressed powder metallurgy sheet + friction stir processing + superplastic forging or forming.
256 citations
TL;DR: In this article, friction stir processing (FSP) was used to refine the grain size in commercial 7075 Al to a sub-micrometer scale (∼250 nm) and the resulting microstructural characteristics were studied.
253 citations
TL;DR: In this paper, the carbon nanotube (CNT)/aluminum composites were fabricated by a combination of powder metallurgy and subsequent friction stir processing (FSP), and microstructural observations indicated that the CNTs were singly dispersed in the composites.
251 citations