Influence of welding temperature on material flow during friction stir welding of AZ31 magnesium alloy

In this work, the effect of welding temperature on material flow during friction stir welding (FSW) of AZ31 magnesium alloy was examined. To this end, FSW was conducted in the temperature range of 0.65-0.85 Tm (Tm is the melting point) and sample-scale EBSD mapping was employed to characterize texture distributio

Influence of micro wet milling parameters on the processing of Komatsuna ( Brassica rapa var. perviridis ) juice with rich phosphatidic acid

The aim of this work was to study the effects of multiple micro wet milling (MWM) parameters on particle size reduction and phosphatidic acid (PA) content enrichment of Komatsuna juice. Through an investigation of MWM milling characteristics for Komatsuna juice with different milling conditions, the results showed that milling time, milling rotational speed, gap size, material feeding rate, and interactions among the milling parameters had different significant effects on reduction in particle size. Furthermore, reduction in particle size strongly promoted the increase of PA content in the milled Komatsuna juice, which could improve the bioaccessibility of PA that converts to lysophosphatidic acid in the GI tract for the restoration of GI disorders. The MWM system was able to produce Komatsuna juice with a smaller particle size (approximately 21 μm) and a higher PA content (approximately 70 μg/mL) in a continuous processing system compared to an ordinary grinding mixer

蛍光指紋イメージングによる食品中成分の可視化

学位の種別:課程博士University of Tokyo(東京大学

Grain structure evolution during friction-stir welding

In this work, the current state of understanding of grain structure evolution during friction-stir welding is briefly reviewed. The broad aspects of this process and experimental techniques for its examination are critically addressed. The specific character of the microstructural evolutions in body-centered cubic, face-centered cubic and hexagonal close-packed metals are considered in detail