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.
Papers published on a yearly basis
Papers
More filters
TL;DR: Friction stir processed Al-Zn-Mg-Cu alloy with grain size 6.2 mu m was subjected to superplastic investigation at 500-535 degrees C and a high strain rate of 1 x 10(-2) s(-1) as discussed by the authors.
39 citations
TL;DR: In this article, the effect of severe plastic deformation associated with friction stir processing (FSP) on grain boundary liquation and the attendant cracking of Inconel 738 superalloy was examined.
39 citations
TL;DR: In this article, friction stir processing was performed on an Al-Mg-Si alloy (AA 6082-T4) at a low tool rotation rate of 200 rpm, and good mechanical and damping properties were simultaneously obtained after FSP.
39 citations
TL;DR: In this paper, a modified version of FSP called friction stir vibration processing (FSVP) was applied to develop a surface composite on AZ91 magnesium alloy, and the results indicated that the FSVP caused a better homogeneous distribution of SiC particles in the microstructure.
Abstract: Friction stir processing (FSP) can be used to improve surface composites. In this study, a modified method of FSP called friction stir vibration processing (FSVP) was applied to develop a surface composite on AZ91 magnesium alloy. In this technique, the workpiece is vibrated normal to the processing direction. The results illustrated that compared with the FSP method, the FSVP caused a better homogeneous distribution of SiC particles in the microstructure. The results also showed that matrix grains of friction stir vibration processed (FSV-processed) samples ((26.43 ± 2.00) µm) were finer than those of friction stir processed (FS-processed) specimens ((39.43 ± 2.00) µm). The results indicated that the ultimate tensile strength (UTS) of FSV-processed specimens (361.82 MPa) was higher than that of FS-processed specimens (324.97 MPa). The higher plastic strain in the material during FSVP, due to workpiece vibration, resulted in higher dynamic recrystallization, and consequently, finer grains were developed. The elongation and formability index of the FSV-processed specimen (16.88% and 6107.52 MPa%, respectively) were higher than those of the FS-processed sample (15.24% and 4952.54 MPa%, respectively). Moreover, the effects of FSVP were also found to intensify as the vibration frequency increased.
39 citations
TL;DR: In this article, a dual-band thermography approach is used to measure the temperature distributions of AA5052 sheet during FSP, and the variation of temperature with process parameters and their correlation to the resulting microstructure are discussed.
Abstract: Despite the large number of studies that are being conducted to advance the friction stir processing (FSP) technology, the effects of FSP on various mechanical and microstructural properties are still in need for further investigations. In addition, correlations between FSP parameters, mechanical properties and microstructural characteristics are not yet well understood. Accurate correlations are needed for successful modeling and process optimization. It is established that the temperature generated during FSP plays an important role in determining the microstructure and properties of the processed sheet and defining the tool life. Process parameters must be carefully chosen to allow the generation of enough heat to soften the material while limiting significant grain growth. Accurate measurement of the temperature distributions during processing are essential to understand the complicated deformation and associated mechanisms and to allow for effective process optimization. In this work, a dual-band thermography approach is used to measure the temperature distributions of AA5052 sheet during FSP. The setup utilizes two infrared detectors, to neutralize the emissivity and the facial effects, with 30 Hz acquisition rate. The variation of temperature with process parameters and their correlation to the resulting microstructure are discussed.
38 citations