Effect of solutes on grain refinement
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 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 …
Effect of solutes on grain refinement
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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- 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 …
WebSci. › 论文详情. Effect of solutes on grain refinement. Progress in Materials Science ( IF 39.580 ) Pub Date : 2024-04-21 , DOI: 10.1016/j.pmatsci.2024.100809. Z. Fan, F. Gao, … WebJan 1, 2024 · Effect of solutes on grain refinement 1. Introduction. All metallic materials start their life with solidification processing, where the metallic materials... 2. Historical research. Al-Ti-B master alloy is the most widely used grain refiner for Al-alloys, and … 3.1. Isothermal melt solidification. To test the validity of the present model, a … Prediction of equiaxed grain density in multicomponent alloys, stirred … The growth restriction factor Q is the key quantity in current descriptions of the … In this paper, the effect of the lattice misfit (f) between the crystalline substrate and … It is interesting to note that grain refinement of high-silicon casting alloys (e.g., 319 … (b) The effect of increasing particle density (dashed lines) from ΔT n –S d 1 to ΔT n … Previous experiments have shown that the grain size decreases with increasing … The same trend exists at a 12 high cooling rate [Fig. 1(b)] but the value of R is kept … Silicon has a stronger effect than iron in reducing the grain size at low … Heterogeneous nucleation of solidification on a substrate is conventionally …
WebJul 19, 2013 · An analysis of the effects of alloy additions on grain refinement in a series of model and commercial aluminium alloy compositions is reported. The data of Birch … 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, 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 …
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 emory primary care in lilburn gaWebJul 26, 2016 · Currently, it is generally acknowledged that effective grain refinement requires both potent nucleating particles and adequate solute elements. [ 6 – 8] The nucleating particles can act as substrates for heterogeneous nucleation of the solid phase, and their potency can be assessed by the lattice disregistry between the solid and the … dr alice huynhWebJul 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 … emory primary care snellvilleWebIt 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 ... emory primary care stockbridgeWebJan 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. dr alice huang melbourne ivfWebJul 1, 2014 · 2) Ultrasonic melt treatment can increase the number of wall crystals and inner crystals, contributing equally to the final refined structure. 3) Both inner and wall crystals may initiate heterogeneously from a cavitation activated oxide or homogeneously from a cavitation induced nucleus. emory primary care in acworthWebJan 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 … dr alice law new plymouth