Results 21 to 30 of about 1,160 (144)
Journal of Materials Research and Technology, 2021 The spatter formation process was observed by high-speed imaging during the full-penetration laser welding (FPLW) process of 4 mm-thick TC4 alloy plates. The effects of process parameters on spatter formation were studied.
Hao Cheng +4 more
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Nanomaterials, 2021 In the laser powder bed fusion (LPBF) process, the operating conditions are essential in determining laser-induced keyhole regimes based on the thermal distribution.
Asif Ur Rehman +5 more
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Online Detection of Keyhole Status in a Laser-MIG Hybrid Welding Process
Metals, 2022 During laser-metal inert gas (MIG) hybrid welding, a large amount of welding status information is generated in droplet transfer, keyhole and molten pool.
Xi’an Fan +3 more
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Depth Dependence and Keyhole Stability at Threshold, for Different Laser Welding Regimes
Applied Sciences, 2020 Depending of the laser operating parameters, several characteristic regimes of laser welding can be observed. At low welding speeds, the aspect ratio of the keyhole can be rather large with a rather vertical cylindrical shape, whereas at high welding ...
Remy Fabbro
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Laser Spot Micro-Welding of Ultra-Thin Steel Sheet
Micromachines, 2021 This paper reports a mechanism understanding how to reduce the solder joint failure phenomenon in the laser spot micro-welding process of ultra-thin steel sheets. An optimization method to improve solder joint service life is proposed. In this study, the
Quanhong Li +4 more
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Advanced Engineering Materials, EarlyView.A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi +3 more
wiley +1 more source
The Efficacy and Safety of <2 cm Micro-Keyhole Microvascular Decompression for Hemifacial Spasm
Frontiers in Surgery, 2021 Objective: Microvascular decompression (MVD) surgery has been accepted as a minimally invasive surgical modality for the treatment of hemifacial spasm (HFS). However, the size of the bone window does not match the concept of minimally invasive.
Jiashang Huang +7 more
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Advanced Materials Technologies, EarlyView.ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel +4 more
wiley +1 more source
Dizhen xuebao基于震前、震后多期卫星数据，对2001年11月4日昆仑山口西MS8.1同震地表破裂进行了研究，结果表明：① 同震破裂带的西段在震前未发现先存破裂遗迹，而东段是在先存地震破裂遗迹上再次发生了破裂。② 震后两年，湖面冰、大型河道、冲沟和冲洪积扇上的地表破裂迅速地被活动性流水和气温变化等破坏，在影像上已无踪迹；震后二十年，低级阶地的地表破裂几乎无法识别，而高级阶地的破裂带保留较完整，可识别长度锐减至64%，呈“碎片”化展布。因此，同震地表破裂带的影像识别主要受所处地貌位置和气候变化等地表作用过程的影响 ...
Jiayi Li +3 more
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Plasma Charge Current for Controlling and Monitoring Electron Beam Welding with Beam Oscillation
Sensors, 2012 Electron beam welding (EBW) shows certain problems with the control of focus regime. The electron beam focus can be controlled in electron-beam welding based on the parameters of a secondary signal.
Valeriy Shchavlev +5 more
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