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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01 Jul 2008
TL;DR: In this paper, the effect of friction stir processing (FSP) on electrical conductivity and corrosion resistance of AA6063-T6 Al alloy was studied, and the microstructural and mechanical properties of the alloy were investigated.
Abstract: The aim of this paper is to study the effect of friction stir processing (FSP) on electrical conductivity and corrosion resistance of AA6063-T6 Al alloy. Also, the microstructural and mechanical ch...
51 citations
TL;DR: Friction stir processing (FSP) has emerged as an effective secondary processing technique to improve the microstructure and properties of aluminum matrix composites (AMCs). Al/(0-15 wt%) Al3Fe AMCs were prepared by adding pure iron powder to molten aluminum and subjected to FSP.
51 citations
TL;DR: Friction stir processing (FSP) has emerged as an effective secondary processing technique to improve the microstructure and properties of aluminum matrix composites (AMCs) as discussed by the authors, which are prepared by adding pure copper powder to molten aluminum and subjected to FSP.
51 citations
TL;DR: In this paper, friction stir processing (FSP) was applied to produce aluminum-based in-situ composites from powder mixtures of Al-5 mol pct CeO2.
Abstract: Friction stir processing (FSP) was applied to produce aluminum-based in-situ composites from powder mixtures of Al-5 mol pct CeO2. A billet of powder mixtures was prepared using the conventional pressing and sintering route. The sintered billet was then subjected to multiple passages of FSP. This technique has combined the hot-working nature of FSP and the exothermic reaction between Al and CeO2. The reinforcing phases were identified as Al11Ce3 and δ*-Al2O3. The Al2O3 particles with an average size of ~10 nm are uniformly distributed in the aluminum matrix, which has an average grain size of approximately 390 to 500 nm. Both the sintering temperature and the tool traversing speed used in FSP have significant influence on the microstructure and mechanical properties of the composite. The composite produced by sintering at 833 K followed by FSP with a tool traversing speed of 30 mm/min possesses an enhanced modulus (E = 109 GPa) and strength (ultimate tensile strength (UTS) = 488 MPa) as well as a tensile ductility of ~3 pct.
51 citations
12 Aug 2015-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, an in-situ aluminum matrix composites were fabricated by 1-3 passes of friction stir process (FSP) using iron (Fe) particles with initial size of 10µm.
Abstract: In-situ aluminum matrix composites were fabricated by 1–3 passes of friction stir process (FSP) using iron (Fe) particles with initial size of 10 µm. Although the initial reinforcing particles were relatively large in size and also agglomerated particles were formed in the obtained composites, all of the processed specimens fractured from the base metal during transverse tensile test. Longitudinal tensile tests revealed that the ultimate tensile strength (UTS) of the composites was up to 43% higher than that of the base metal; however, the strain to fracture of the composites reached to about 0.2. Al–Fe intermetallic compounds (IMCs) formed at the interface of the aluminum matrix and Fe particles were responsible for the suitable metallurgical bond between the reinforcing particles and aluminum matrix along with the superior mechanical properties of the processed composites. Microstructure examinations showed that the grain structure at the stir zone was somewhat refined after FSP without any Fe particles compared with the base metal. However, in the case of the composites reinforced by Fe particles, the grain refinement was more obvious at some areas of the stir zone with respect to the FSPed samples without Fe particles. This observation was attributed to the presence of sub-micron Fe particles and/or IMCs and consequently the pinning effect of these particles on the grain boundary migration during grain growth. These areas exhibited superior microhardness values compared with other regions. The enhancement of the FSP pass numbers led to improvement in the distribution of reinforcing particles along with increasing the thickness of IMCs at the interface. Therefore, the UTS of the composites increased with raising the number of FSP passes.
51 citations