Topic
Alloy
About: Alloy is a research topic. Over the lifetime, 171884 publications have been published within this topic receiving 1719420 citations. The topic is also known as: alloys.
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TL;DR: In this article, the research and development status of casting magnesium alloys including the commercial casting alloys and the new types casting alloy are reviewed, with more attention to microstructure and mechanical properties of modified-AZ91, AM60 and WE43 alloys with various additions.
361 citations
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TL;DR: In this paper, the ionization and redeposition of binary alloys, coupling of the anodic reactions in accordance with the concepts of irreversible thermodynamics, and volume diffusion in the presence of given supersaturations of single and double vacancies are analyzed theoretically.
Abstract: In the electrolytic dissolution of binary alloys the concepts of ionization and redeposition of a metal, coupling of the anodic reactions in accordance with the concepts of irreversible thermodynamics, and volume diffusion in the presence of given supersaturations of single and double vacancies are analyzed theoretically. The ionization‐redeposition mechanism is in principle possible but only if coupling of the anodic reactions occurs. Volume diffusion may be operative via divacancies. Results from x‐ray investigations and from measurements with a rotating disk‐ring electrode for copper‐gold alloy indicate that interdiffusion of the constituent metals in the alloy occurs to a significant extent and dissolution of Au does not take place. Electrochemical measurements with a Cu‐Zn alloy involving 30 a/o (atomic per cent) Zn give no indication of occurrence of the ionization‐redeposition mechanism.
361 citations
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TL;DR: In this article, the authors investigated the corrosion behavior of mold-cast Mg alloy AZ91 in as-cast (F), homogenized (T4), and artificially-aged (T6) conditions in chloride media.
Abstract: Corrosion behavior of mold-cast Mg alloy AZ91 is investigated in as-cast (F), homogenized (T4), and artificially-aged (T6) conditions in chloride media. Heat treatment influences mainly th...
360 citations
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TL;DR: In this paper, a Niobium-niobium silicide based in situ composite directionally solidified from a Nb-Ti-Hf-Cr-Al-Si alloy is described.
Abstract: This article describes room-temperature and high-temperature mechanical properties, as well as oxidation behavior, of a niobium-niobium silicide basedin situ composite directionally solidified from a Nb-Ti-Hf-Cr-Al-Si alloy. Room-temperature fracture toughness, high-temperature tensile strength (up to 1200 °C), and tensile creep rupture (1100 °C) data are described. The composite shows an excellent balance of high- and low-temperature mechanical properties with promising environmental resistance at temperatures above 1000 °C. The composite microstructures and phase chemistries are also described. Samples were prepared using directional solidification in order to generate an aligned composite of a Nb-based solid solution with Nb3Si- and Nb5Si3-type silicides. The high-temperature mechanical properties and oxidation behavior are also compared with the most recent Ni-based superalloys. This composite represents an excellent basis for the development of advanced Nb-based intermetallic matrix composites that offer improved properties over Ni-based superalloys at temperatures in excess of 1000 °C.
360 citations
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TL;DR: In this paper, a palladium-based alloys catalysts without platinum for the oxygen reduction reaction (ORR) in an acid medium were shown for the first time and their electrochemical characteristics for ORR were determined at 30 °C in sulphuric acid.
357 citations