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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Publicou 4 edições por ano

ISSN Imprimir: 1093-3611

ISSN On-line: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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CHARACTERISTIC FEATURES OF THE SURFACE RELIEF FORMATION OF METALS MODIFIED BY COMPRESSION PLASMA FLOWS

Volume 23, Edição 3, 2019, pp. 275-282
DOI: 10.1615/HighTempMatProc.2019031163
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RESUMO

Action of compression plasma flows (CPF) is a promising high-energy method for material modification ensuring uniform distribution of components in ultradeep (to about 100 μm) modified layers. In the present paper, using the scanning electron microscopy, we studied the surface relief and the thickness of a modified layer of W108 steel treated with compression plasma flows. To generate a plasma flux under experimental conditions, a magnetoplasma compressor of compact geometry with an energy storage battery of 15 kJ was used. It was established that during CPF action, the molten layer of material under the action of high-density plasma spreads over the surface. After the end of exposure, at the stage of rapid crystallization of the melt, a developed surface relief is formed with a height difference from 1 to 80 μm. With increase in the energy parameters of the acting CPF, the surface irregularities first increase and then decrease again, which is associated with the melt entrainment in the liquid phase. The dependence of the average melting depth of steel on the power density of the CPF action has been established. It is shown that the heat transfer model based on the Stefan problem allows one to predict the average melting depth of the target with sufficient accuracy; however, to determine the actual thickness of the modified layer, hydrodynamic entrainment and surface irregularities should be taken into account.

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