In this paper, the effect of ultrasonic peening surface treatment on the mechanical properties of TIG butt weld joints of low-carbon steel (AISI 1020) was studied. A single V-angle (45°) was made on sheets of metal used then welded at constant parameters, namely: current, voltage. Wire filler ER70S-3 with argon was used to obtain many butt welding joints. Some of them were subjected to ultrasonic peening at one, two and three passes. The micro-hardness, microstructure, tensile and bending were tested. The results show increases in the tensile strength after the welding process. The test results showed improvements in the tensile strength of the weldments in comparison to the base metal. On the other hand, the tensile strength decreased with the ultrasonic process. Nevertheless, the tensile strength increased at a high number of ultrasonic passes. On the contrary, the ultrasonic process enhanced the bending strength compared to the base metal, whereas the weldments ability to bend deteriorated.
Aims: Remanufacturability Index (RI) was calculated to indicate the ability of remanufacturing conventional shaping into CNC machine tool through multi-criteria assessment methodology. Place and Duration of Study: Middle Technical University, Institute of Technology-Baghdad, Mechanical Techniques School, between 2021/2022. Methodology: Conventional shaping machines which are remanufactured-upgraded into CNC machine tools were analyzed to classify a group of seven remanufacturing-upgrading alternatives. Multi-criteria were defined include cost, time, accuracy and complex shape, reliability, processing range and efficiency and ergonomic. Weighting of importance of criteria and performance of alternatives were conducted by applying comparative literature analysis and machine tool remanufacturing experience analysis of mechanical structure of remanufactured-upgraded conventional shaping into CNC machine tool as well as alternatives performances scoring. Results: As many as the number of automated axes, as high as the Remanufacturability Index (RI) which is dedicated to remanufactured-upgraded conventional shaping into 2-axis to 5-axis CNC machine tool. Conclusion: Remanufactured-upgrading conventional shaping into CNC machine tool is of high remanufacturing potentials that satisfy conditions of technical, economic and environmental feasibilities.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.