Circular beam oscillation
WebDec 1, 2024 · Fetzer et al. (2024) found that oscillating the laser beam was beneficial to suppress the porosity formation in the weld zone for autogenous welding of AA6082. They claimed that circular beam oscillation with both100 Hz and 200 Hz can achieve the porosity-free welds where the amplitude of the oscillation path was set at a fixed value. WebMay 1, 2024 · They found that beam oscillation could improve the weld morphology and increased the ratio of equiaxed grains in welds. Among the three patterns, the circular oscillation had the most obvious effect, which led to a significant increase in elongation.
Circular beam oscillation
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WebMay 1, 2024 · Beam oscillations caused the breakdown of grains in the mushy region which effectively hindered grain growth while also initiating more grain nucleation [109]. … WebIn order to achieve a circular laser beam oscillation pattern, the frequencies and the amplitudes were identical for both scanning axis ( x -and y -axis) and a phase difference of ... View in...
WebThe electron beam’s oscillation exhibited the form of a circle. The specimens were removed from the vacuum chamber 10 min after welding to achieve pre-cool the weld, … WebDec 19, 2024 · Due to the important application in the study of vibrational circular dichroism and helical dichroism of chiral molecules, the tunable vortex beam at mid-infrared region has attracted increasing attention. Based on orbital angular momentum (OAM) conservation in nonlinear interactions, the vortex pumped singly resonant optical parametric oscillator …
WebAug 15, 2024 · Applying circular oscillation scanning in the SLM process, the beam moves along a chosen trajectory and then the regular high-frequency motion of laser beam is used to stir molten pools, which is expected to bring about the elimination of micro-pores and improvement of the microstructures. WebNov 1, 2013 · Abstract and Figures Experimental results show that the oscillations of the electron beam have a direct effect on the processes of formation of the primary and secondary structures of the weld...
WebOct 15, 2016 · Beam oscillation increases the fraction of equiaxed grains in weld fusion zone. • Beam oscillation has no effect on weld strength but obvious effect on elongation. • Circular oscillation obtains the soundest weld with the best mechanical properties. • Mechanism is discussed by the stirring effect on laser keyhole and melt flow. Abstract
WebSep 6, 2024 · On one hand, circular beam oscillation reduces the micro-pores in molten pools and cuboid samples, increasing the relative density of the cuboid sample to 99.95%. On the other hand, circular beam ... great job you just earned 30WebA circular polarization state can mathematically be obtained as a superposition of electric field oscillations in the vertical and horizontal direction, both with equal strength but a relative phase change of 90°. great job you did for me sarcastically or notfloating quirkWebTo solve the uneven weld formation caused by the lower internal energy distribution of laser in circular beam oscillation, an inscribed double-circle oscillation was proposed for the laser-arc... floating racetrack for bathtubWebPerson as author : Pontier, L. In : Methodology of plant eco-physiology: proceedings of the Montpellier Symposium, p. 77-82, illus. Language : French Year of publication : 1965. book part. METHODOLOGY OF PLANT ECO-PHYSIOLOGY Proceedings of the Montpellier Symposium Edited by F. E. ECKARDT MÉTHODOLOGIE DE L'ÉCO- PHYSIOLOGIE … great job your exam is scheduled 翻译WebOct 9, 2024 · One is the homogenization of interface energy distribution caused by beam oscillation, which decreases the degradation and destruction of polymer macromolecular chains induced by high temperature. The other is the formation of interface bi-directional forces that both inhibit the porosity formation and intensify the chemical reactions. great job you\u0027re the bestWebApr 10, 2024 · We report the first demonstration of CRAs laser-trapping in a programmable array of optical bottle beams. We observe the decay of a trapped Rubidium circular level over 5ms using a novel optical ... great job you just earned