Effect of solutes on grain refinement
WebSep 8, 2024 · The solute effect on grain refinement was attended as early as 1949 by Cibula [] and has been widely investigated in the following decades [6,7,8,9].It has been … 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 …
Effect of solutes on grain refinement
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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 WebThe 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 …
WebJan 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 …
WebAug 1, 2001 · The solute effect of silicon produces grain refinement at about 3 wt%, while titanium only needs to be added at concentration of about 0 ⋅ 1 wt% for optimum grain refi n- WebApr 1, 2012 · This paper describes a set of experiments with misch metal and rare earth silicide additions in 1010 and 1030 steel to determine whether grain refinement occurs. Target rare earth (RE) contents of 0.1 and 0.2% were employed. After melting, the desired RE addition was added during tapping and then poured into green sand molds. The …
Web15 hours ago · The stirring needle and the shoulder generated a frictional thermal cycle, making the grain undergo DRX and complete the grain refinement process. Compared with the grain size of the fine-grained BM in Fig. 1 , the grains in the SZ region were refined to a smaller size of around 2.9 μm under liquid CO 2 cooling condition, while that at room ...
WebMar 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 … brother bas 416a partsWebJul 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 … brother batteryWebApr 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 … brother baseball svgWebJan 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 carewest fanning calgaryWebJan 1, 2024 · Effect of solutes on grain refinement. Grain refinement not only enhances the mechanical performance of as-cast metallic materials but also provides an effective … carewest group pty. ltdWebThe 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 … brother bassWebApr 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 … carewest george boyack address