Results 91 to 100 of about 6,019,713 (343)

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

Experimental Investigation on the Cavitation Fundamental Characteristics of a Venturi Tube Under Ambient-Pressure Conditions

Applied Sciences
The sensitivities of the cavitation inception conditions and the cavitation discharge coefficient, together with the path independence and uniqueness of inception, underpin reliable use of cavitating Venturi tube under ambient conditions.
Guichun Chen, Deyong Zou, Weidong Zhou, Luopeng Li, Fangxiang Wang   +4 more
doaj   +1 more source

Analysis of Diesel Knock for High-Altitude Heavy-Duty Engines Using Optical Rapid Compression Machines

Energies, 2020
In high altitude regions, affected by the low-pressure and low-temperature atmosphere, diesel knock is likely to be encountered in heavy-duty engines operating at low-speed and high-load conditions.
Xiangting Wang, Haiqiao Wei, Jiaying Pan, Zhen Hu, Zeyuan Zheng, Mingzhang Pan   +5 more
doaj   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Investigation of Aerodynamic Pressure Characteristics Inside and Outside a Metro Train Traversing a Tunnel in High-Altitude Regions

Modelling
The numerical method was employed to analyze the transient pressure characteristics of a metro train passing through a tunnel in high-altitude regions.
Fei Wang, Haisheng Chen, Tianji Liu, Xingsen He, Chunjie Cheng, Lin Xu, Shengzhong Zhao   +6 more
doaj   +1 more source

Propagation rules of shock waves in confined space under different initial pressure environments

Scientific Reports, 2022
In this paper, an initial pressure adjustable explosion vessel was developed, and the effect of negative pressure, positive pressure (0.2–1.8 atm) different initial ambient pressure on the explosive shock wave generated by the explosion of explosives was
F. Q. Wang, Q. Wang, Y. J. Wang, Z. M. Li, R. Li, X. C. Li, L. A. Yang, J. W. Lu   +7 more
doaj   +1 more source

High pressure transport studies of the LiFeAs analogues CuFeTe2 and Fe2As

, 2012
We have synthesized two iron-pnictide/chalcogenide materials, CuFeTe2 and Fe2As, which share crystallographic features with known iron-based superconductors, and carried out high-pressure electrical resistivity measurements on these materials to ...
D A Zocco, D Y Tütün, J J Hamlin, J R Jeffries, Larson A C, M B Maple, Monteverde M, Pertlik F, Ren Z A, S T Weir, Vaipolin A A, Wilson J A, Y K Vohra   +12 more
core   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source