Results 71 to 80 of about 625,188 (172)
The Geodetic Hull Number is Hard for Chordal Graphs
, 2017 We show the hardness of the geodetic hull number for chordal ...
Bessy, Stéphane +3 more
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Қарағанды университетінің хабаршысы. Физика сериясы, 2018 The multi-component nitride coverings on the basis of (Zr-Ti-Nb)N, (Zr-Ti-Cr-Nb)N and (Zr-Ti-Cr-Nb-Si)N are received by the method of vacuum-arc deposition from multielement cathodes Zr-Ti-Nb, Zr-Ti-Cr-Nb, Zr-Ti-Cr-Nb-Si in the environment of nitrogen ...
D.K. Yeskermessov +2 more
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Materials Research LettersBalancing the hardness and electrical conductivity of copper alloys within complex compositions and processes poses a formidable challenge. This study proposes a strategy combining machine learning with the Pareto front techniques to identify optimal ...
Hang Fu +8 more
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Multi-component (Ti-Zr-Cr-Nb)N coatings’: structure and properties
Қарағанды университетінің хабаршысы. Физика сериясы, 2017 In the article discusses the results of the deposition of nanostructured coatings obtained by vacuum arc deposition of cathode (Ti-Zr-Cr-Nb), and analyzes their structure, morphology, elemental composition, and tribological properties (friction, wear ...
D.K. Yeskermessov +2 more
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Process Optimization in Laser Welding of IN792 DS Superalloy
MetalsNi-base superalloys are employed to produce parts of aeronautic engines, space vehicles and power plants. During the production process or lifetime of components, cracks may occur which affect their performance.
Giuseppe Barbieri +7 more
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Journal of the American Philosophical Association, 2017 ABSTRACT:What makes a choice hard? I discuss and criticize three common answers and then make a proposal of my own. Paradigmatic hard choices are not hard because of our ignorance, the incommensurability of values, or the incomparability of the alternatives. They are hard because the alternatives are on a par; they are comparable, but one is not better
openaire +2 more sources
Short-term hot-hardness characteristics of five case hardened steels [PDF]
Short-term hot-hardness studies were performed with carburized and hardened AISI 8620, CBS 1000, CBS 1000M, CBS 600, and Vasco X-2 steels. Case and core hardness measurements were made at temperatures from 294 to 811 K (70 to 1000 F).
Anderson, N. E., Zaretsky, E. V.
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Nihon Kikai Gakkai ronbunshuSince it is known that tensile strength and hardness are roughly proportional, a hardness test is often used as a simple and substitute test. However, it has been reported that the proportional relationship between tensile strength and hardness is broken
Yuta MIZUNO +3 more
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Fenmo yejin jishuFe–Mn–P–C non-magnetic steel balance block parts were prepared by pressing-sintering method by adding Fe3P powders and graphite powders in different mass fraction to the high manganese steel alloy powders.
BAO Chongxi +3 more
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STRUCTURAL CHANGES HAVE IN COMPLEX ALLOYING WHITE IRON DURING DESTABILIZING HEATING
Nauka ta progres transportu, 2011 The data concerning the kinetics of secondary carbides precipitation and hardness of high-chromium white cast iron during destabilization are presented.
U. H. Chabak +2 more
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