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   Articles with "keyhole" as a keyword



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Material flow analyses of high-efficiency joint process in VPPA keyhole flat welding by X-ray transmission system

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recommendations! Published in 2020 at "Journal of Cleaner Production"

DOI: 10.1016/j.jclepro.2019.119450

Abstract: Abstract The consideration of environment-friendly and low energy consumption tends to control and guide the progress of metal joint manufacturing processes. Variable polarity plasma arc (VPPA) welding is an environment-friendly, high quality and efficiency joint… read more here.

Keywords: metal; keyhole; efficiency joint; weld pool ... See more keywords

Keyhole refilled friction stir spot welding of aluminum alloy to advanced high strength steel

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recommendations! Published in 2017 at "Journal of Materials Processing Technology"

DOI: 10.1016/j.jmatprotec.2017.06.039

Abstract: Abstract A keyhole refilled Friction Stir Spot Welding (FSSW) process is developed, which consists of two steps. Regular FSSW is performed in the first step. After that, the tool travels along a circular path to… read more here.

Keywords: friction stir; process; keyhole; refilled friction ... See more keywords
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Keyhole dynamics and morphology visualized by in-situ X-ray imaging in laser melting of austenitic stainless steel

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recommendations! Published in 2020 at "Journal of Materials Processing Technology"

DOI: 10.1016/j.jmatprotec.2020.116673

Abstract: Abstract In-situ X-ray observation was used to investigate the effect of process conditions on keyhole behavior in laser melting with austenitic stainless steel. It was confirmed that the keyhole depth and width increased, and the… read more here.

Keywords: laser; keyhole depth; laser melting; keyhole ... See more keywords
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Uncovering the coupled impact of defect morphology and microstructure on the tensile behavior of Ti-6Al-4V fabricated via laser powder bed fusion

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recommendations! Published in 2021 at "Journal of Materials Processing Technology"

DOI: 10.1016/j.jmatprotec.2021.117113

Abstract: Abstract The preferred defect domain space for enhanced mechanical properties is a critical unknown in the selective laser melting (SLM) additive manufacturing community. This paper presents a systematic approach to relate mechanical properties and the… read more here.

Keywords: uncovering coupled; keyhole; fusion; laser ... See more keywords
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Endoscopic retrosigmoid keyhole approach in cerebellopontine angle tumors. A surgical cohort.

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recommendations! Published in 2021 at "Neurocirugia"

DOI: 10.1016/j.neucie.2021.02.001

Abstract: INTRODUCTION AND OBJECTIVES To determine the safety and efficacy of endoscopic keyhole surgery in patients with cerebellopontine angle tumours. MATERIALS AND METHODS This was a retrospective study of patients with cerebellopontine angled tumours treated by… read more here.

Keywords: keyhole approach; cerebellopontine angle; keyhole; retrosigmoid keyhole ... See more keywords
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Effect of keyhole characteristics on porosity formation during pulsed laser-GTA hybrid welding of AZ31B magnesium alloy

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recommendations! Published in 2017 at "Optics and Lasers in Engineering"

DOI: 10.1016/j.optlaseng.2017.01.018

Abstract: Abstract This paper experimentally investigates the relationship between laser keyhole characteristics on the porosity formation during pulsed laser-GTA welding of magnesium alloy. Based on direct observations during welding process, the influences of laser keyhole state… read more here.

Keywords: porosity; characteristics porosity; keyhole characteristics; porosity formation ... See more keywords
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Influence of oscillating magnetic field on the keyhole stability in deep penetration laser beam welding

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recommendations! Published in 2021 at "Optics and Laser Technology"

DOI: 10.1016/j.optlastec.2020.106715

Abstract: Abstract The stability of the keyhole decreases for deep penetrated high-power laser beam welding. The keyhole tends to collapse with increasing laser power and e.g. keyhole induced porosity can occur. This study deals with the… read more here.

Keywords: stability; beam welding; oscillating magnetic; keyhole ... See more keywords
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Pure endoscopic surgery via subtemporal extradural keyhole approach for middle cranial fossa tumors.

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recommendations! Published in 2019 at "World neurosurgery"

DOI: 10.1016/j.wneu.2019.06.131

Abstract: OBJECTIVE Extradural subtemporal keyhole approach could provide adequate removal for some specific middle skull base tumors. The combination of endoscopy and keyhole technique might further help to minimize the complications and provide optimal surgical visualization.… read more here.

Keywords: subtemporal extradural; keyhole; via subtemporal; middle cranial ... See more keywords
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Fundamental understanding of open keyhole effect in plasma arc welding

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recommendations! Published in 2023 at "Physics of Fluids"

DOI: 10.1063/5.0144148

Abstract: The keyhole arc welding technique has the advantage of improving welding efficiency by utilizing a stable keyhole mode. Accurate understanding of the keyhole effect is necessary to enhance the welding quality. Due to the high… read more here.

Keywords: plasma arc; arc welding; keyhole; open keyhole ... See more keywords
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Deep Learning-Based Automatic Modulation Classification Over MIMO Keyhole Channels

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3195229

Abstract: Automatic modulation classification (AMC) is a significant part of cognitive communication systems. In early researches, likelihood-based (LB) and feature-based (FB) solutions were proposed for the AMC problem. With the developments in the data-driven approaches, a… read more here.

Keywords: classification; modulation classification; automatic modulation; deep learning ... See more keywords

Investigation on keyhole mode fiber laser welding of SS 316 in a self-protected atmosphere

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recommendations! Published in 2019 at "Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science"

DOI: 10.1177/0954406219864137

Abstract: This work focuses on examining the influence of welding parameters under different welding atmospheres and evaluation of keyhole profile during fiber laser welding operation. The experiments are carried out in two different welding atmospheres, namely… read more here.

Keywords: self protected; protected atmosphere; fiber laser; keyhole ... See more keywords