This work examines the effects of Nb and Nb-B additives on the high-temperature flow behavior and mechanical properties of low-carbon steel. The base, 0.015% Nb-bearing (15Nb alloy), and 0.
View Article and Find Full Text PDFDue to the restrictions of the diesel engine emissions and the massive demand of energy, the fossil diesel fuel has been consumed quickly and the resources cannot suffice the demand. Alternative fuels that include bio alcohols, hydrogen and biodiesel can make up the diesel fuel depletion. Biodiesel is convenient for diesel engine operation due to its properties like fossil diesel properties.
View Article and Find Full Text PDFThis study aims to investigate the combined effect of niobium (Nb) microalloying and austenite grain refinement, using a specific heat treatment cycle, on the microstructure and tribological properties of Armox 500T steel. In this work, Nb addition and thermal cycling were utilized for grain refinement and enhancement of the mechanical properties of Armox 500T alloy, to provide improved protection via lightweight armor steel components with a high strength-to-weight ratio. The kinetics of transformation of the developed Armox alloys were studied using JMATPro version 13.
View Article and Find Full Text PDFCurrently, magnesium alloys are widely utilized in diverse sectors due to their unique properties. However, the AZ61Mg alloy, a commonly used magnesium alloy, is known to have poor wear resistance, which limits its applications. To address this issue, researchers have investigated various surface treatment techniques, including the Abbott Firestone method, to improve the wear resistance of this alloy.
View Article and Find Full Text PDFObjectives: To evaluate the role of applying abdominal pressure using abdominal belt in overall improvement in the practice of colonoscopy.
Method: The randomised, single-blind case-control study was conducted from March 2020 to March 2021 at Kafrelsheikh University Hospital, Cairo, Egypt, and comprised patients of either gender aged 30-70 years who underwent elective colonoscopy. The patients were randomised into belly belt group A and control group B.