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Enhancing sand screen performance with integrated slurry testing and CFD-DEM modelling
Published 2025-01-01Get full text
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Forest land-use change affects soil organic carbon in tropical dry forests of the Peruvian Amazon
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Are there Risks from Nanocomposite Restoration Grinding for Dentists?
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Human papillomavirus vaccination hesitancy among young girls in Ethiopia: factors and barriers to uptake
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Polypharmacy and self-medication among older adults in Indian urban communities—a cross-sectional study
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1113
COMPARATIVE RESEARCHES OF FRACTURES OF HIGH-STRENGTH CAST IRON IN THE AS-CAST AND DEFORMED STATE
Published 2016-01-01Subjects: “…the results of comparative studies of fracture surfaces of high-strength cast iron in the as-cast state and after hot direct extrusion through an aperture of a conical die are presented. the shape change of graphite inclusions and components of the metal matrix is examined with increasing the reduction ratio from 0 (as-cast state) to 80%. for the fist time, using the electrochemical etching of the metal matrix of the cast iron, it is demonstrated experimentally that at plastic deformation the ductile flow of graphite inclusions occurs without fracturing of the latter. the surface morphology of a deformed graphite inclusion is revealed. it is shown that inside the inclusion the strain is distributed non-uniformly: the peripheral zones are deformed to a larger extent while the central part may retain its original radial structure. the fact that the most part of graphite inclusions on the fracture surface of the deformed cast iron appeared undamaged (very small amount of fractured inclusions was observed) testifies against the common opinion that graphite acts as a crack nucleation site. a hypothesis is put forward that the crack nucleates in the metal matrix, presumably at the pearlite/ferrite interface, and propagates from one graphite inclusion to another rounding but not damaging the latter.…”
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Characterization and Application of the Thermal Neutron Radiography Beam in the Egyptian Second Experimental and Training Research Reactor (ETRR-2)
Published 2007-01-01“…The neutron radiography facility unit utilizes one of the radial beam tubes. The track-etch technique using nitrocellulose films and converter screen is applied. …”
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A Calculation Method of Angular Contact Ball Bearing Contact Stiffness Considering Lubrication Effect
Published 2021-09-01“…The increase in the radial load makes the axial stiffness increase and the radial stiffness decrease. …”
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Study on the Characteristics of Traction Forces Difference Asymmetric Steering Bogies
Published 2016-01-01“…This article comes up with a new concept of applying the difference between traction forces on front and rear wheelsets to guiding control, as well as the design of a new type of structurally simple asymmetrical radial bogies, which lead to the proposition of traction forces difference-steering asymmetric radial bogies. …”
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