Experimental Thermal Analysis of Friction Stir Processing

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.

Mechanical Behaviour of Mg/SiC Composite Processed by Friction Stir Processing

“…The further from the top surface, the lower the temperature and the more grain refinement attained. Similar observations were reported in literature [26][27][28][29]. Figure 5 introduces a comparison of the micro-hardness values between as-received, FSPed and FSPed Mg AZ31B/SiC composite at 1200 rpm and 100 mm/min.…”

Mechanical properties of water desalination and wastewater treatment membranes

“…The mechanical behavior of polymers is very sensitive to temperature [104], [177], [178], [179] and [180]. More specifically, the yield stress and the Young's modulus decrease dramatically with increasing of temperature.…”

Effects of welding environment on microstructure and mechanical properties of friction stir welded AZ91C magnesium alloy joints

“…Because of its higher heat capacity comparing to air, water not only dictates a greater cooling rate on the welding zone but also causes the peak temperature of the process to drop by a considerable amount. 18, 19 Some researchers have demonstrated that SFSW has great capability of producing ultrafine grained aluminium alloys. 20 Darras et al 21 conducted experimental investigations on submerged FSP of AZ31 magnesium alloy.…”