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APPLICATION OF SPHEROIDIZING «CHIPS»-MASTER ALLOY ON COPPER BASE CONTAINING NANOSCALE PARTICLES OF YTTRIUM OXIDE FOR HIGH-STRENGTH CAST IRON
Published 2016-04-01Subjects: “…inoculants based on copper and magnesium, nanosized powder of yttrium oxide, high-speed shock impact, chemical and phase composition of «chips»-inoculants, ductile iron, melting, spheroidizing treatment, microstructure, mechanical and technological properties…”
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342
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343
Backscattering of Ultrasonic Waves as the Basis of the Method of Control of Structure and Physicо-Mechanical Properties of Cast Irons
Published 2023-10-01Subjects: “…method of controlling the structure and strength of cast irons…”
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344
Microstructural Insights into Solid Particle Erosion in a High-Chromium Cast Iron
Published 2024-12-01Subjects: “…high-chromium cast irons…”
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345
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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346
Rhetorical questions as aggressive, friendly or sarcastic/ironical questions with imposed answers
Published 2020-12-01Subjects: Get full text
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347
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348
Research status quo of Traditional Chinese Medicine hot ironing therapy in the treatment of spleen and stomach diseases (中医热熨疗法治疗脾胃疾病的研究现状分析)
Published 2024-05-01Subjects: “…traditional chinese medicine hot ironing therapy…”
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