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 paper, a modified Hummers method was used to synthesize graphene oxide sheets and then the surface morphology of silicon carbide particles was tailored with wrapping of synthesized graphene oxide sheet through a facile route, and the assembled film structure of GO on SiC particles were investigated using Field emission scanning electron microscopy (FE-SEM), X-Ray photo-electron spectroscopy (XPS), transmission electron microscope (TEM) and X-ray diffraction (XRD) analysis.
29 citations
TL;DR: In this paper, the Ni-based superalloy Mar-M247 was evaluated as a potential tool material for friction stir processing (FSP) of X70 steel, and the tool wear damage was mitigated by controlling friction processing parameters, such as rotation and welding speeds, Z-force values and gas shielding.
29 citations
TL;DR: In this article , the authors focus on friction stir additive manufacturing (FSAM) and additive friction stir deposition (AFSD) and provide a system approach framework and a conceptual process model to guide researchers.
Abstract: Additive manufacturing (AM) has completely altered the traditional component manufacturing and qualification paradigm. It provides unitisation and topological optimisation opportunities simultaneously. Broadly, the additive manufacturing processes are classified as fusion-based or solid-state. The solid-state additive manufacturing processes are relatively nascent. Among these, friction stir-based processes involve intense shear deformation of material while building. In this review, we focus on friction stir additive manufacturing (FSAM) and additive friction stir deposition (AFSD). These friction stir welding derived techniques have ability to produce microstructures that lead to better mechanical properties than the conventionally processed parent alloys; in many cases overcoming the traditional strength-ductility tradeoff paradigm. The best way to capture this advantage is to conduct materials selection for build which benefit from the attributes of these processes. This review provides a systems approach framework and a conceptual process model to guide researchers. A case is built that the best mechanical properties can be obtained by alloy design for such disruptive and innovative manufacturing processes. The intrinsic and extrinsic limitations are highlighted to guide researchers in the field of FSAM and AFSD. While AFSD is readily applicable to lower melting temperature materials currently, applying it to high-temperature materials requires significant research and development on tool materials. Examples of materials processed by FSAM/AFSD include aluminium alloys, magnesium alloys, titanium alloys, steels and nickel-base superalloy. A physics-based process modelling framework applicable to FSAM/AFSD is provided. To fully validate such models, it is imperative to use machines with appropriate sensors that capture the machine parameters, tool health, and workpiece temperature.
29 citations
TL;DR: In this paper, friction stir processing was utilized for enhancing the erosion-corrosion resistance of SS316L steel, most widely used material for marine applications, which showed nearly 3.5 times and 5 times higher erosion and corrosion resistance at oblique impingement.
29 citations
TL;DR: In this paper, the authors investigated the effect of friction stir processing on grain size and hardness in Al 6n,Fe and found that the rhomboidal particles are more effective in pinning grain boundaries during heat treatment.
Abstract: Friction stir processing (FSP) of Al 5059 is studied in which subsequent heat treatment is conducted to investigate its effects on grain size and hardness. It was found that mainly elongated and rhomboidal morphologies of Al6(Mn,Fe) particles are present in the alloy both before and after FSP, where the rhomboidal particles are more effective in pinning grain boundaries during heat treatment. The stir zone reached a temperature of 705 K (432 °C), and ThermoCalc modeling confirmed that the Al6(Mn,Fe) particles will remain stable at this temperature. Negligible grain growth was observed during FSP of the Al 5059 due to low grain boundary mobility resulting from slow diffusion associated with a high Mg content in the alloy. During heat treatment at 448 K (175 °C) grain growth could be correlated with time using a particle-controlled grain growth model. Microhardness values indicate that Hall–Petch behavior occurs in the processed alloy, while dislocation density and particle dispersion play a minor role in strengthening.
29 citations