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Effect of solutes on grain refinement

WebFeb 28, 2024 · When the best refinement effect is achieved (Zr content is 0.4 mass%), the increase in nucleation temperature tends to level off. When the Zr content is lower than 0.4 mass%, Tmin and TG,α increase with the increase of Zr content, and TG,α is greater than Tmin. There is a recalescence phenomenon. WebIt was clarified that Zr solutes have synergistic effects in improving the mechanical properties of Ti alloys by both grain refinement and solid-solution phenomena. Furthermore, the Zr solution behavior in the powder metallurgy Ti-4 wt.% Fe alloy, which is one of the α + β dual phase alloys, was investigated . Zr solutes caused both α-Ti ...

Revisiting the Role of Solutes in Grain Refinement of …

WebThe effect of separate solute additions of Al, Zr, Sr, Si, and Ca on grain size of Mg has been investigated. Increasing the Al content in hypoeutectic Mg-Al alloys resulted in a continuous reduction in grain size up to 5 wt pct Al, reaching a relatively constant grain size for higher Al contents (above 5 wt pct). The effect of Sr additions was investigated in … WebApr 12, 2024 · The grain refinement mechanisms of solute atom Zr and Al 3 Zr are different, which leads to the difference in grain refinement effect. The refining effect of Al 3 Zr phase is much better than that of solute atomic Zr, which occupies a dominant position. Wang et al. studied the counter mats with rubber backing https://round1creative.com

Modeling of grain refinement: Part I. Effect of the solute …

WebJul 18, 2024 · Experimental data on grain size in hypoeutectic alloys with various solute concentrations are collected and analyzed. Curves of grain size as functions of composition are plotted and compared with the relevant phase diagrams. These curves indicate that the minimum in grain size occurs at the solubility limit of the solute on a phase diagram, and … WebNov 18, 2015 · Obviously, this is attributed to the combined effect of solid solution strengthening, which reduces ductility, and grain refinement that concurrently increases both strength and ductility. Compared with Al, Mg marginally improves the elongation of Zn alloys even though it increases the yield strength substantially. Fig. 5 WebApr 1, 2011 · In the absence of interaction of solutes, this parameter Q measures the effect of solute in grain refinement of the alloy [199]. Higher Q-value implies more rapid … counter meaning in chinese

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Effect of solutes on grain refinement

Effects of precipitates versus solute atoms on the deformation …

WebJan 1, 2024 · (ii) whether the effect of solutes is weakened or even eliminated at high cooling rate and large thermal undercooling? The present work aims to answer these questions, and the outcome may shed new light on the factors affecting grain refinement in solidification with a high cooling rate. 2. Solute and nucleant selection2.1. Solute WebMay 1, 2024 · The solute effect on the nucleation barrier and nucleation rate, thus on the grain refinement of Al alloys both with and without high potency nucleation particles, was analyzed based on the...

Effect of solutes on grain refinement

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WebApr 12, 2024 · The grain refinement mechanisms of solute atom Zr and Al 3 Zr are different, which leads to the difference in grain refinement effect. The refining effect of … WebJul 15, 2010 · As a result, the role of solute has received little attention in ultrasonic induced structural refinement with an associated lack of knowledge on the exact influence of ultrasonic irradiation on solute induced growth restriction. Eskin [4] studied the refinement of binary Mg–Al alloys in the range of 0.5–8%Al by ultrasonic irradiation.

WebJan 1, 1989 · Although transition metals such as Zr and Cr with low solid solubility in Al equally exhibit a grain-refinement effect in pure Al [44] [45] [46], they are mainly added in 7xxx alloys to... WebApr 13, 2024 · The grain refinement effect caused by the constitutional undercooling of both alloys could be excluded because the compositions of Al and Zn, which are the …

WebJul 2, 2014 · The effect of Al additions on grain refinement of Mg-Gd-Y alloys with different solute contents at different cooling rates has been investigated. For all alloys, significant grain refinement was due to the formation of Al2(Gd x Y1−x ) nucleant particles. The number density and size distribution of Al2(Gd x Y1−x ) were affected by both solute … WebJan 31, 2011 · The effect of these elements was investigated by producing a series of castings in a nonconsumable arc-melting furnace, and the results were interpreted with …

WebJan 31, 2011 · This tendency of a “saturation” of the grain-refining effect obtained with increasing additions of solute may be understood by an analysis of the effect of Q on the growth rate. At low solute levels, the growth rates are considerably high, and there is a relatively large decrease in growth rate with increasing Q.

WebMay 1, 2024 · It is revealed that the solute dependent Gibbs-Thompson coefficients of Al-Cu, Al-Mg and Al-Si alloys have the influence of promoting the grain refinement by … counter meals melbourne cbdWebApr 10, 2024 · The effects of low Sn (1.0 wt%) and Mn (0.5 wt%) content on the microstructures and mechanical properties of as-extruded Mg–2Al–1Zn (AZ21) alloys were systematically investigated. The combined addition of Sn and Mn significantly refined the grains of the AZ21 alloy, reducing the average grain size from 25.77 to 2.17 μm. The … counter meaning in post officeWebThe effect of isothermal treatment temperatures and isothermal treatment time on the microstructure was studied. The results showed that the globular and equiaxed grains with the average grain size of 60 μm and the shape factor of circle of 0.95 can be obtained when the melt of Ni-Cr-W superalloy was subjected to the heat treatment of 10 min at … brenham texas hourly weatherWebNov 1, 2024 · Some solutes have poisoning effect on grain refinement. For example, too much addition of Si leads to grain coarsening of cast Al alloys. In Al Si binary alloys, over 3 wt%Si addition causes significant grain coarsening. This phenomenon has been widely studied in the past decades [20], [22], [23], [24], [25], [26]. brenham texas holiday innWebMar 16, 2024 · Over the decades, it is widely accepted that grain refinement is strongly influenced by the solutes in steels. However, most of the grain refinement studies and/or … brenham texas high schoolWebJan 9, 2024 · The first behavioral phenomenon is the appearance of a stress plateau at the yield point, which is often a result of interactions between the gliding dislocations and solute atoms and is caused by grain refinement, as is the … brenham texas job offersWebJan 1, 2008 · As a first approximation, the effect of solutes on grain refinement can be estimated by summing the effects of individual solutes; however, it is acknowledged … countermeasure injury table