effect of ca addition on solidification microstructure of hypoeutectic al

Effect mechanisms of micro

But up to date no reports can be found on the effect of micro-alloying element La (La addition is below 0.1 wt.%) on the solidification of hypoeutectic Al-Si alloys. This study carried out solidification experiments with Al-6Si alloys micro-alloyed by element La.

Microstructure refinement and enhanced tensile properties

The microstructure and tensile properties of the hypoeutectic Al-11Mg 2 Si alloy modified by the rare earth element erbium was comprehensively studied. It was found that addition of 0.1 wt% Er was efficient for modifying eutectic Mg 2 Si from coarse mazelike lamellar to fine coralline fiber with a decrease in aspect ratio of Mg 2 Si from 14.9 2.3 m to 1.2 0.5 m and a reduction in

The Effect of Fe Content on the Solidification Pathway,

In the present study, the solidification pathway, microstructure and thermal conductivity of Fe-rich Al–x Si (x = 5, 7, 9, wt%, the same below) alloys were systematically investigated. The results showed that the thermal conductivity was firstly improved and then decreased with Fe content increasing. The improvement and decreasing rate of thermal conductivity was related to the Si content

Effects of Sr on the Microstructure of Electromagnetically

The present study investigated the effects of Sr addition on the microstructure of semi-solid Al A356 alloy during electromagnetic stirring. Different amounts of Sr (0-300 ppm) were added to the alloy and the effect of Sr on eutectic nucleation and growth temperature of the eutectic silicon phase were determined. Also, effect of Sr addition on the characteristics of primary aluminum phase was

[PDF] Effect of Cu, Mg and Fe on solidification

Corpus ID: 139941100 Effect of Cu, Mg and Fe on solidification processing and microstructure evolution of Al-7Si based foundry alloys inproceedings{Javidani2015EffectOC, title={Effect of Cu, Mg and Fe on solidification processing and microstructure evolution of

Influence of nickel addition and casting modulus on the

Influence of nIckel addItIon and caStIng ModuluS on the propertIeS of hypo-eutectIc ductIle caSt Iron e. colin-garca a, a. cruz-ramrez a*, g. reyes-castellanos a, J.a. romero-Serrano a, r.g. Snchez-alvarado a, M. hernndez-chvez ba* Instituto Politcnico Nacional – ESIQIE, Departamento de Ingeniera en Metalurgia y Materiales, Ciudad

(PDF) Influence of calcium on the microstructure and

The effect of Ca addition on the microstructure, physical characteristics (density/porosity), and mechanical properties (tensile and impact strength) has been investigated in an Al-7Si-0.3Mg-xFe (x=0.2, 0.4, and 0.7) alloy. The size of Al-Fe

Scandium Effect on Undercooling and Dendrite

In addition, the morphology of the Al-4.5 wt pct Cu-0.4 wt pct Sc dendrites is less favored in the 111 direction at similar undercoolings as with Al-4.5 wt pct Cu. The development of solidification continuous cooling transformation diagrams that relate the solidification paths to the inherent solidification microstructures is also introduced.

Effects of melt cooling rate on the microstructure and

2019/9/25In order to investigate the effects of Cu content on the solidification microstructure of Al-Cu alloy, the hypoeutectic Al 95 Cu 5 alloy, the eutectic Al 82.9 Cu 17.1 alloy and the hypereutectic Al 80 Cu 20 alloy were selected as the research objects, and the microstructure changes of alloys were investigated under different cooling rates.

Effect mechanisms of micro

But up to date no reports can be found on the effect of micro-alloying element La (La addition is below 0.1 wt.%) on the solidification of hypoeutectic Al-Si alloys. This study carried out solidification experiments with Al-6Si alloys micro-alloyed by element La.

Effect of Ta addition on solidification characteristics of

2020/5/1Effect of Ta addition on solidification characteristics of CoCrFeNiTa x (x = 0.1–0.7) eutectic high entropy alloys were investigated. With increasing Ta content, CoCrFeNiTa x alloys changed from hypoeutectic alloys with primary γ phase to eutectic alloy (x = 0.43) and to hypereutectic alloys with primary Laves phase. . Consequently, Ta content in primary phase significantly increased, while

Effects of La and Ce Addition on the Modification of Al

2016/5/25This study focuses on the effects of the addition of rare earth metals (mainly lanthanum and cerium) on the eutectic Si characteristics in Al-Si based alloys. Based on the solidification curves and microstructural examination of the corresponding alloys, it was found that addition of La or Ce increases the alloy melting temperature and the Al-Si eutectic temperature, with an Al-Si recalescence

Effects of La and Ce Addition on the Modification of Al

2016/5/25This study focuses on the effects of the addition of rare earth metals (mainly lanthanum and cerium) on the eutectic Si characteristics in Al-Si based alloys. Based on the solidification curves and microstructural examination of the corresponding alloys, it was found that addition of La or Ce increases the alloy melting temperature and the Al-Si eutectic temperature, with an Al-Si recalescence

A Review on the Heat Treatment of Al

A Review on the Heat Treatment of Al-Si-Cu/Mg Casting Alloys 57 Heterogeneous nucleation should be the major approach to refine the grains, which nucleate on some of the foreign nuclei sites and grow slowly in the melt. Effective grain refiners, such as TiAl3 and TiB2, must match their lattice perfect coherently to the Al

Effect mechanisms of micro

2020/6/15Especially, no reports can be found on the effect of micro-alloying element La (La addition is below 0.1%) on the solidification of hypoeutectic Al-Si alloys. This paper investigates the effect of the micro-alloying element La on the solidification microstructure and the tensile properties of the hypoeutectic Al-Si alloys.

Effect of Sr modification on microstructure and thermal

2020/11/1Trace amount of Sr (0.05 wt.%) was added into the hypoeutectic Al−Si (3−12 wt.% Si) alloys to modify their microstructure and improve thermal conductivity. The results showed that the thermal conductivity of hypoeutectic Al−Si alloys was improved by Sr modification, and the increment and increasing rate of the thermal conductivity gradually increased with Si content increasing.

Effect of Co and Ni Addition on the Microstructure and

This paper presents results of a study of the effects of Co and Ni in a hypoeutectic Al–Si alloy on microstructure and mechanical properties at room and elevated temperature. Tensile test specimens with microstructures comparable to those obtained in high-pressure die casting, i.e. SDAS ~ 10 m, were produced by directional solidification in a Bridgman furnace.

The Effect of Fe Content on the Solidification Pathway,

In the present study, the solidification pathway, microstructure and thermal conductivity of Fe-rich Al–x Si (x = 5, 7, 9, wt%, the same below) alloys were systematically investigated. The results showed that the thermal conductivity was firstly improved and then decreased with Fe content increasing. The improvement and decreasing rate of thermal conductivity was related to the Si content

Effect of Fe and Si on the microstructure and phase composition

Effect of Fe and Si on the microstructure and phase composition of the aluminium-calcium eutectic alloys UDC 669.71.055 The solidification of all Al – Ca alloys should be completed via this invariant reaction. A study of the hypoeutectic alloys with calcium

The Effect of the Cooling Rate on the Microstructure and

The solidification microstructure is characterized by lamellar structure, based on inner strips of primary phase ε(Cu 3 Sn), the intermediate layer of η(Cu 6 Sn 5), and the outer layer β(SnSb). Kazuhiro et al. 17 have studied the effect of Ca addition on solidification

Effect of complex modification of Ca and Sb on the

The co-addition of 0.2 wt% Ca-Sb significantly refines the microstructure of eutectic phase in Al-11Mg 2 Si alloy from coarse lamella and needle-like phase to the spherical structure. The refinement of eutectic Mg 2 Si can be attributed to the adsorption of Ca and Sb atoms on Mg 2 Si surfaces, which inhibits eutectic growth in the fast growth direction.

Solidification Behavior and Microstructure of Al

2019/2/3Knuutinen et al. [] reported that recalescence is an indication of nucleation effects, while a reduced T G indicates an effect on growth of the Al-Si eutectic in the solidification front. In this study, the Sr-, Yb-, and (Sr + Yb)-modified alloys with full modifications have lower T N and T G,

Effect of Ca/Al Ratio on Stabilization/Solidification of

2018/12/30The composition of binder is shown in Table 2.The binder was made up of high-alumina cement, lime, and gypsum to study the effect Ca 2+ and Al 3+ ion contents on ettringite production. This series of binder was named ASC in which A, S, and C represent high

Effect of Si content on the microstructure and properties

2020/4/3Al–(12, 20, 35 wt%)Si alloys were fabricated using powder metallurgy process involving hot pressing followed by hot extrusion. The effect of Si content on the microstructure [by scanning electron microscopy], the mechanical properties (hardness and tensile tests

Effect mechanisms of micro

But up to date no reports can be found on the effect of micro-alloying element La (La addition is below 0.1 wt.%) on the solidification of hypoeutectic Al-Si alloys. This study carried out solidification experiments with Al-6Si alloys micro-alloyed by element La.

Influence of Cerium on Microstructure and Solidification

Thermal analysis has become very important in foundry because it aids in studying the effect of additives on eutectic growth temperature and assessing the quality of modifications. This research was performed to investigate the influence of the addition of Ce (0.1–1.0 wt.%) on the eutectic Al–Si–Cu–Mg alloy characteristics of solidification. Field emission scanning electron microscopy

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