Results 71 to 80 of about 566,112 (285)
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
Real-time observation of a correlation-driven sub 3 fs charge migration in ionised adenine
Communications Chemistry, 2021 Sudden ionisation of larger molecules can initiate a correlation-driven process called charge migration, but due to its short time scale this process is challenging to observe.
Erik P. Månsson +17 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek +5 more
wiley +1 more source
Complete Electric Field Characterization of Ultrashort Multicolor Pulses
Ultrafast ScienceThe advancement of laser technology, producing increasingly shorter and more intricate optical pulses, has elevated the significance of precise characterization of a transient electric field, including the carrier-envelope phase.
Maximilian Kubullek +7 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller +6 more
wiley +1 more source
Journal of Modern Optics, 2008 This is a tutorial review of the basic principles and present status of free-electron lasers (FELs) with particular emphasis on high-gain FELs such as FLASH in Hamburg. With their unprecedented intensity and a pulse duration of a few 10 fs, these novel accelerator-based radiation sources in the ultraviolet and X-ray regime will open new fields in ...
openaire +3 more sources
Advanced Engineering Materials, EarlyView.High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin +4 more
wiley +1 more source
Few-femtosecond time-resolved study of the UV-induced dissociative dynamics of iodomethane
Nature CommunicationsUltraviolet (UV) light that penetrates our atmosphere initiates various photochemical and photobiological processes. However, the absence of extremely short UV pulses has so far hindered our ability to fully capture the mechanisms at the very early ...
Lorenzo Colaizzi +8 more
doaj +1 more source
Analysis of XFEL serial diffraction data from individual crystalline fibrils
IUCrJ, 2017 Serial diffraction data collected at the Linac Coherent Light Source from crystalline amyloid fibrils delivered in a liquid jet show that the fibrils are well oriented in the jet.
David H. Wojtas +29 more
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, 2012 We study the effects of field fluctuations on the total yields of Auger electrons, obtained in the excitation of neutral atoms to a core-excited state by means of short-wavelength free-electron-laser pulses.
Lambropoulos, P., Nikolopoulos, G. M.
core +1 more source