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Purpose The results of a research into friction welding of ductile cast iron using stainless steel interlayer are presented. Approval/approach: Using the friction welding technique, ductile cast iron and austenitic steel are welded in this paper. Moreover, the hardness across the interface ductile cast iron, stainless steel interface was determined on a metallographic specimen. Findings The process of friction welding was followed by the diffusion of Cr, Ni and C atoms across the ductile cast iron-stainless steel interface, which was based on careful review of experimental results. In stainless steel, chromium carbides were produced, which led to an increase in carbon dioxide content, but the size and distribution of which were dependent on the distance from the interface. Originality/Value The main point of this paper is to contribute to the literature on ductile cast iron friction welding.
Source link: https://doi.org/10.1108/00368791311331248
Magne alloys have a great deal as a design component for lightweight construction due to their low density and high specificity. Twin-roll casting technology is an inexpensive and energy-efficient method for magnesium wire manufacture. For the first time during the compression test at different temperatures and forming speeds, the deformation behavior of twin-roll cast and heat-treated AZ31 wire pre-profile is investigated. The average activating energy for plastic deformation of twin-roll cast and heat-treated magnesium alloy AZ31 is 159. 008 kJmol1. The process map's instability region begins at a minimum forming temperature of 250 °C and extends to a wide variety of high forming speeds. Existing models for describing magnesium alloys' hot forming behavior can be extended and validated based on these findings and observations.
Source link: https://doi.org/10.3390/cryst12020173
Abstract : The microstructure of Fe-15Mn-10Al-0. 8C low density duplex steel ingot was investigated by laser confocal scanning calorimetry, metallographic microscope, and scanning electron microscope. The microstructure of Fe-15Mn-10Al-0. 8C low dendrite steel is mainly composed of coarse austenite dendrites and the granate phase in dendrite, as shown by the results. When the temperature and holding time of the ingot reach or exceed 1150°C and 2 h respectively, the austenitic dendrites transform into equiaxed grains, and the ferrite is distributed in bulk at austenite grain boundaries, with the austenitic dendrites turning into equiaxed grains and granular granit boundaries in bulk. At 365 KJ/mol, Sellars' model estimated the activation energy for austenite grain growth.
Source link: https://doi.org/10.1088/2053-1591/ac4ebc
Abstract The description of the solidification process in casting processes of varying product thickness is based on solidification systems, segregation, as well as primary and secondary microstructures. Using polished microsections, the degree of shrinkage porosity in belt-cast high-manganese steel will be determined quantitatively.
Source link: https://doi.org/10.1515/pm-2021-0072
Embedging Abstract A high chromium cast iron with a high percentage of vanadium as the wear resistance layer was produced on the medium carbon steel substrate by laser cladding process in the present study. According to SEM photographs, round-like VC particles uniformly distributed on the grain boundary and 7 C 3 are distributed on grain boundary; such micromorphology gives it more hardness and excellent wear resistance than the HCCI layer without vanadium addition.
Source link: https://doi.org/10.1088/2053-1591/abd968
Abstract The microstructures of ZT63-xCu magnesium alloys were investigated and their mechanical properties were investigated in this paper, with the support of an optical microscope, X-ray diffraction, scanning electron microscope, and mechanical testing equipment. The structure of as-cast alloy alloys had a typical dendrite morphology, according to the authors. The eutectic structure was enhanced by the addition of a small amount of Cu, but when Cu content increased, the volume fraction of the eutectic body was increased and its permanence was improved. MgZnCu phase was created in the alloy with the addition of Cu elements, in comparison to the -Mg, Mgzn2 and Mg2Sn phases, with the addition of Cu elements. The MgZnCu phase's volume fraction increased with the increase of Cu, so the proportion of MgZn2 phase gradually decreased. The elongation was 15. 5%, with mechanical properties, its tensile strength, and yield strength all matching mechanical properties, according to 231Mpa and 80Mpa respectively.
Source link: https://doi.org/10.1088/1757-899x/770/1/012093
Abstract of the study of the chemistry of carbide-forming elements in the production of the gray pearlitic iron grade SCh25 It's also impossible to determine the proportions of carbide-forming elements. The investigation of the composition of zones with an interdendritic distribution of graphite types D, E castings of a pressure plate is carried out. In granular carbide-nitride and sulfide-phosphide phases, it has been found that ‘uncontrolled' carbide-forming elements are present in cast iron. A conclusion has been drawn on the effect of carbide formers on the emergence of areas of interdendritic distribution of graphite.
Source link: https://doi.org/10.1088/1757-899x/966/1/012023
Abstract The paper explores the key features of the formation of a cast steel fragment that looks like a stone-like fragment. Secondary fracture occurs after metal overheating leads to hot deformation, such as forging, rolling, and stamping, as well as after overheating during heat treatment. One of the most important aspects of modern engineering is the investigation of patterns of the emergence of a stone-like fracture in cast steels.
Source link: https://doi.org/10.1088/1742-6596/1515/2/022071
Abstract LATP sheets with LiF and SiO 2 additions, as electrolytes for solid-state batteries were characterized by conductivity, microstructure, and mechanical properties aiming for an optimized composition, with tape cast electrolytes for solid-state batteries such as electrolytes for solid-state batteries. As a general trend, higher LiF-to-SIO2 ratios led to lower porosities and higher standards of elastic modulus and hardness determined by indentation tests, but the presence of the orthorhombic LATP contributes to a decrease in the ionic conductivity as a result of a decrease in the ionic conductivity. The crack growth behavior of crack growth revealed poor grain boundaries was used to determine poor grain boundaries.
Source link: https://doi.org/10.1007/s10853-021-06773-6
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