Results 31 to 40 of about 7,618 (233)

Formation of Tribotechnical Al-Cu Coatings with Functional Additives by Centrifugal Induction Surfacing

Механика машин, механизмов и материалов, 2022
The article presents the results of metallographic and tribotechnical studies of composite coatings based on aluminum with a high copper content formed on the inner surface of the workpiece by centrifugal induction surfacing.
Aleksandr I. Komarov, Dmitriy V. Orda, Igor A. Sosnovsky, Artem A. Kurilyonok   +3 more
doaj   +1 more source

Failure Analysis and Protection of Oxygen Corrosion of Reheater Tube in a Power plant [PDF]

E3S Web of Conferences, 2021
The failure analysis of reheater tubes were analyzed by means of alloy composition analysis, metallographic structure analysis, mechanical properties analysis and oxide composition analysis.
Yang Chao, Li Xiuneng, Wang Yunan, Sun Mingcheng   +3 more
doaj   +1 more source

Metallographic study of non-ferrous metal products from the Maray 1 site of the Baitovo Culture in the Lower Ishim River region [PDF]

Вестник археологии, антропологии и этнографии
The article examines non-ferrous metal products from the Baitovo Culture materials of the Early Iron Age hillfort of Marai 1. This settlement is located in the forest-steppe of the Ishim River region of Western Siberia.
Tigeeva E.V.
doaj   +1 more source

STRUCTURAL CHANGES IN STRUCTURAL STEELS DURING THERMAL CYCLING

Architecture and Engineering, 2021
Introduction: During experimental studies of structural steels responsible for the reliability of metal structures used, for example, in hoisting and transporting machinery, we established a correlation between the magnetic parameter Hp and ...
Valeriy Gordienko, Sergey Repin, Alexander Vorobiev, Angelica Abrosimova   +3 more
doaj   +1 more source

Synthesis of components for composite material of electrical contacts with unique properties for high-current electrical apparatus with arc-free switching

Фізика і хімія твердого тіла
Experimental research has determined the optimal composition of components for a composite material used in electrical contacts with unique properties designed for high-current electrical apparatus that perform switching without arc formation.
N. Hablovska, T. Pavlenko, A. Kloc-Ptaszna, Ł. Krzemiński, G. Matula, D. Łukowiec, M. Kononenko, B. Hablovskyi   +7 more
doaj   +1 more source

Forged products by Russian craftsmen of the 17th–19th centuries on the basis of materials from the Kikki-Akki burial ground of Upper Taz Selkups: technological characteristics

Вестник археологии, антропологии и этнографии, 2020
The article studies the technology of making iron and steel items of Russian origin, discovered in the Kikki-Akki burial ground of Northern Selkups (18th–19th centuries) in the north of Western Siberia in the upper reaches of the Taz River. In the study,
N.M. Zinyakov, O.E. Poshekhonova
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Metal ornaments from the burial mound necropolis Chornyanka of the Bilozerka culture (11th–10th centuries BC)

Історія науки і техніки, 2023
The flat cemetery near the village of Chornyanka, Kakhovka district, Kherson region, is one of the largest row grave fields of the Late Bronze Age archaeological culture of Bilozerka in the northern Black Sea region.
Tetiana Hoshko
doaj   +1 more source