3D printing of extremely viscous materials using ultrasonic vibrations
Sign Up to like & getrecommendations! Published in 2018 at "Additive manufacturing"
DOI: 10.1016/j.addma.2018.04.029
Abstract: Abstract Heterogeneous materials used in biomedical, structural and electronics applications contain a high fraction of solids (>60 vol.%) and exhibit extremely high viscosities (μ > 1000 Pa s), which hinders their 3D printing using existing technologies. This study shows that… read more here.
Keywords: using ultrasonic; printing extremely; extremely viscous; ultrasonic vibrations ... See more keywords
Ultrasonic vibrations and coal permeability: Laboratory experimental investigations and numerical simulations
Sign Up to like & getrecommendations! Published in 2017 at "International journal of mining science and technology"
DOI: 10.1016/j.ijmst.2017.01.001
Abstract: Abstract Ultrasonic vibrations in coal lead to cavitation bubble oscillation, growth, shrinkage, and collapse, and the strong vibration of cavitation bubbles not only makes coal pores break and cracks propagate, but plays an important role… read more here.
Keywords: vibrations coal; cavitation; coal permeability; permeability ... See more keywords
Material flow, microstructure and mechanical properties of friction stir welded AA 2024-T3 enhanced by ultrasonic vibrations
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Manufacturing Processes"
DOI: 10.1016/j.jmapro.2017.10.008
Abstract: Abstract Influence of stable ultrasonic power on the process effectiveness and weld quality are investigated in the friction stir welding of 3 mm thick AA 2024-T3 with and without ultrasonic vibrations. It is found that the… read more here.
Keywords: material flow; friction stir; stir; ultrasonic vibrations ... See more keywords
Microstructure characterization and mechanism of acoustoplastic effect in friction stir welding assisted by ultrasonic vibrations on the bottom surface of workpieces
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Manufacturing Processes"
DOI: 10.1016/j.jmapro.2019.04.028
Abstract: Abstract Considering the acoustoplastic effect, an application of ultrasonic vibrations to Friction Stir Welding (FSW) evokes more and more interests in recent years. The material in the lower region of one FSW joint is the… read more here.
Keywords: stir welding; friction stir; ultrasonic vibrations; acoustoplastic effect ... See more keywords
Initiation of recoverable strain variation in shape memory bimetal strips by ultrasonic vibrations
Sign Up to like & getrecommendations! Published in 2018 at "Materials Letters"
DOI: 10.1016/j.matlet.2017.11.132
Abstract: Abstract The realisation of the recoverable strain variation by ultrasonic vibrations was studied in shape memory bimetallic strips produced by explosion welding. Two bimetal “Ti49.4Ni50.6–AISI 304” and “Ti50Ni50–Ti49.3Ni50.7” strips were deformed to 5% and subjected… read more here.
Keywords: ultrasonic vibrations; strain variation; shape memory; recoverable strain ... See more keywords
Experimental comparison of the effects of superimposed axial and bending ultrasonic vibrations on friction stir welding process
Sign Up to like & getrecommendations! Published in 2019 at "Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture"
DOI: 10.1177/0954405417729414
Abstract: True application of ultrasonic vibrations improves the solid-state process of friction stir welding. This study focuses experimentally on the effects of axial (along the tool axis) and bending ultrasonic vibrations on material stirring process of… read more here.
Keywords: ultrasonic vibrations; process; stir welding; friction stir ... See more keywords
A method and apparatus for determination of the ultrasonic-assisted forming limit diagram
Sign Up to like & getrecommendations! Published in 2021 at "Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science"
DOI: 10.1177/09544062211011509
Abstract: It was recently demonstrated that ultrasonic vibrations could result in lower forming forces and a better surface finish in a wide range of metal forming processes. The Nakazima stretch-forming test is a long-established experimental procedure… read more here.
Keywords: forming limit; method apparatus; limit; limit diagram ... See more keywords