Πλοήγηση ανά Θέμα "Materials Science, Multidisciplinary"
Αποτελέσματα 21-40 από 79
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Effects of temper condition and corrosion on the fatigue performance of a laser-welded Al-Cu-Mg-Ag (2139) alloy
(2010)The effects of temper condition and corrosion on the fatigue behavior of a laser beam welded Al-Cu-Mg-Ag alloy (2139) have been investigated. Natural aging (T3 temper) and artificial aging (T8 temper) have been applied ... -
Elastic and viscoelastic indentation of flat surfaces by pyramid indentors
(2006)The present work presents the results of frictionless and adhesionless contact of flat surfaces by pyramid indentors. The materials of the contacting solids were modelled as homogeneous and isotropic, linear elastic, as ... -
The elastic-plastic indentation response of a columnar thermal barrier coating
(2010)Thermal barrier coatings with a columnar microstructure are prone to erosion damage by a mechanism of surface cracking upon impact by small foreign particles. In order to explore this erosion mechanism, the elastic indentation ... -
End corrections for rarefied gas flows through capillaries of finite length
(2013)The influence of end effects on rarefied gas flows through moderately long capillaries is investigated by implementing the concept of effective capillary length, representing a sum of the real length of capillary and its ... -
End corrections for rarefied gas flows through circular tubes of finite length
(2014)A method to take into account the influence of the inlet/outlet ends on rarefied gas flows through moderately long capillaries proposed previously [Vacuum 97, 26 (2013)] is applied to gas flows through circular tubes. The ... -
EPR STUDY OF Ti-Si-C-N SYSTEM
(2010)Nanocrystalline (TiC(x) + SiC)/C (sample 1) and TiC(0.3)N(0.7) + SiC + Si(3)N(4) (sample 2) materials were prepared by the non-hydrolytic sol-gel method. Sample 2 was obtained from sample 1 by annealing in an NH(3) atmosphere ... -
Estimation of fatigue crack growth retardation due to crack branching
(2004)Quantitative analysis is provided to estimate the reduction of fatigue crack growth rate due to overload crack branching. A recent mixed-mode fatigue crack growth model based on the dilatational component of the accumulated ... -
Evidence of HIV-1 gp120/V3-CCR5 peptide complex organization in vitro
(2011)The V3-loop of the HIV-1 envelope glycoprotein gp120 interacts with the chemokine receptor CCR5 on the surface of the target cell. Electrostatic interactions between the electropositive V3-loop and the strongly electronegative ... -
Evidence on the corrosion-induced hydrogen embrittlement of the 2024 aluminium alloy
(2005)The present work aims to provide evidence of corrosion-induced hydrogen embrittlement of the aircraft aluminium alloy 2024. An extensive experimental investigation involving metallographic and fractographic analyses as ... -
Explicit integration of bounding surface model for the analysis of earthquake soil liquefaction
(2010)This paper presents a new plasticity model developed for the simulation of monotonic and cyclic loading of non-cohesive soils and its implementation to the commercial finite-difference code FLAC, using its User-Defined-Model ... -
Fluid Flow at the Nanoscale: How Fluid Properties Deviate from the Bulk
(2013)The studies of fluid flows have been lately transferred to a significant extend at the micro- and the nano-scale, since there is increasing interest in applications that could make possible the construction of systems from ... -
Gas-surface scattering effect on vacuum gas flows through rectangular channels
(2011)Flow of a rarefied gas through a channel of rectangular cross section is investigated numerically and experimentally. Emphasis is given on the study of the molecular scattering law influence at the wall boundary surfaces. ... -
Growth of TiB2 and TiC coatings using pulsed laser deposition
(1997)Refractory coatings of TiC and TiB2 have been grown by pulsed laser deposition on Si(100) and on X155 steel at various substrate temperatures ranging from 40 degrees C-650 degrees C. A pulsed KrF excimer laser was used ... -
Hydrogen absorption into aluminum alloy 2024-T3 during exfoliation and alternate immersion testing
(1998)Exfoliation and alternate immersion corrosion were investigated in Al alloy 2024-T3 (UNS A92024) uptake during exposure and to correlate it with corrosion characterization. Characterization involved determination of weight ... -
Improvement of fatigue crack growth resistance by controlled overaging in 2024-T3 aluminium alloy
(2014)A controlled overaging process is proposed to increase region II fatigue crack propagation resistance of 2024-T3 aluminium alloy. Overaging was achieved by subjecting the material from the initial T3 state to heat treatment ... -
Influence of nano-inclusions' grain boundaries on crack propagation modes in materials
(2011)The effect of nano-inclusions on materials strength and toughness has attracted great interest in recent years. It has been shown that tuning the morphological and microstructural features of materials can tailor their ... -
The influence of salt fog exposure on the fatigue performance of Alclad 6xxx aluminum alloys laser beam welded joints
(2010)Laser welding is increasingly used for the fabrication of lightweight and cost-effective integral stiffened panels in modern civil aircraft. As these structures age in service, the issue of the effect of corrosion on their ... -
Integrating the JIT philosophy and manufacturing resources planning in the factory of the future
(1998)This report analyses the possibility of integrating the Just-In-Time manufacturing philosophy and Manufacturing Resources Planning. The purpose is to show the feasibility of using JIT with MRP II and how they can work ... -
Inverse Thermal Analysis of Heat-Affected Zone in Al2129 and Al2198 Laser Welds
(2013)Case study analyses of A12139 and Al2198 laser welds are presented. These analyses demonstrate the concept of constructing parameter spaces for prediction of properties within the heat-affected zone (HAZ) of welds using ...