Friction Stir Processing (FSP) is a recent outgrowth of the Friction Stir Welding (FSW) process and relies on solid-state deformation to modify the surface of the working surface/materials. Our work to date has shown to locally eliminate casting defects and refine the microstructure to improve their mechanical properties and enhance corrosion resistance. Such improvements have important implica...

Abstract:In this study, an effort has been made to determine the influence of rotational speed of tool on themicrostructure and hardness values of friction stir welded 2024-T851 aluminum alloy. The microstructure of stir zonein the joints has been investigated. It was found that the particles such as Al6(CuFeMn) particles are broken up duringfriction stir welding, and the degree of break up of ...

The present investigation was conducted to study the true retentions of α-tocopherol, tocotrienols and β-carotene in crown daisy, unripe hot pepper, onion, garlic, and red pepper as affected by various domestic cooking methods, those were, boiling, baking, stir-frying, deep-frying, steaming, roasting, and microwaving. Fatty acid compositions were determined by GC, and HPLC were used for quantif...

OBJECTIVES The aim of this study was to investigate the capabilities of balanced steady-state free precession (bSSFP) cardiac magnetic resonance imaging as a novel cine imaging approach for characterizing myocardial edema in animals and patients after reperfused myocardial infarction. BACKGROUND Current cardiac magnetic resonance methods require 2 separate scans for assessment of myocardial e...

the objective of this study was to develop a numerical model for the prediction of temperature distribution, effective plastic strain distribution, and especially material flow in friction stir welding of copper plates. the deform-3d software was used by incorporating a lagrangian incremental formulation. threedimensional results of the material flow pattern which were extracted using the point...

Background Global myocardial edema, a surrogate measure of myocardial inflammation, has been reported in patients with chronic dilated cardiomyopathy (DCM) based on T2weighted STIR imaging. However, STIR imaging is prone to motion artefact and issues related to cardiac cycle timing and coil sensitivity. We hypothesised that a novel quantitative CMR T2 mapping technique would provide a reliable ...

Friction stir welding does not involve bulk melting of the components that are joined. This has inspired attempts to exploit it for joining materials which differ in properties, chemical composition or structure, and where fusion can lead to detrimental reactions. The purpose of this special issue of Science and Technology of Welding and Joining was to assess the status of friction stir welding...

Background Myocardial oedema (area-at-risk, AAR) is typically imaged using a pre-contrast T2-weighted short tau inversion recovery (T2w-STIR) sequence on cardiovascular magnetic resonance (CMR) imaging. However, this sequence is prone to motion and rhythm artefact, signal dropout, blood-pool artefact, surface coil signal inhomogeneity and potentially prohibitive long breath-hold duration. This ...

MR imaging, primarily the spin-echo technique, is increasingly important in evaluating spinal disease [1-3]. We have found, however, that short TI inversion recovery (STIR) in conjunction with spin-echo techniques provides higher tissue contrast images in shorter imaging times while minimizing imaging degradation due to motion and pulsation. The STIR sequence suppresses the signal from fat [4],...

Even if A Stir of Echoes (1958) has often been overshadowed by Richard Matheson’s best-known novels I Am Legend (1954) and The Shrinking Man (1956), it should be given the credit it deserves as a novel that functions both as a reflection as well as a source of intertextuality. A Stir of Echoes is rooted in the tradition of the ghost story and the American gothic, but above all, it comprises mot...