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Microstructures and grain refinement performance of Al–Ti–B–C grain refiner via powder metallurgy
Rare Metals, 2015Abstract The Al‐5Ti‐0.5B‐0.5C grain refiner was prepared by powder metallurgy (PM). Microstructures of the grain refiner and its grain refinement performance in commercially pure aluminum (Al) were investigated by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry ...
Cong Xu +4 more
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Effect of La on Microstructure and Grain-Refining Performance of Al-Ti-C Grain Refiner
Journal of Rare Earths, 2006Abstract Al-Ti-C grain refiner was prepared by SHS (self-propagating high-temperature synthesis)-melting technique. The effect of La on the microstructures of grain refiner was studied by OM, TEM, SEM, XRD, and EDS. The experimental results indicate that La can improve the wettability between liquid aluminum and graphite; the addition of La results ...
Chunxiang Xu +4 more
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Microstructure and formation mechanism of grain-refining particles in Al-Ti-C-RE grain refiners
Journal of Rare Earths, 2015Abstract The Al-5Ti-0.2C-based grain refiners with different contents of rare earth (RE) were successfully prepared via powder metallurgy and vacuum casting. The microstructural evolution has been studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Cong XU +6 more
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Grain refinement of self-hardening aluminum alloys
2016Grain refinement offers several benefits in aluminum casting applications. It can be performed by inoculation, representing one of the mostly used method at industrial level and is based on the addition of nucleating agents. By using grain refinement method important benefits can be reached, for both cast and wrought aluminum alloys: a fine ...
ROSSO, MARIO +3 more
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Grain Refinement and Grain Size Control in Superplastic Forming
JOM, 1982Fine grain size is a microstructural requirement for superplastic alloys. We now have a general understanding of the methods of grain refinement and of restriction of grain coarsening. Phase transformation, recrystallation, deformation of duplex microstructures, and phase separation in duplex alloys can produce grain refinement, while particle ...
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Nucleation Kinetics and Grain Refinement
2008AbstractThis article discusses selected highlights of thermodynamic relationships during solidification and nucleation kinetics behavior in connection with the basis of nucleation treatments, such as grain refinement and inoculation, to provide a summary of nucleation phenomena during casting.
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Master Alloys for Grain Refinement
2019Master alloys are routinely added into aluminum melts before casting for grain refinement purposes. The widely used master alloys contain titanium and boron in the forms of Al3Ti and TiB2 particles in an aluminum matrix. Upon addition into aluminum melts, Al3Ti dissolves into the aluminum melts and promotes the heterogeneous nucleation of the α-Al ...
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Grain Refinement in Aluminum Alloys
2016The published information on the mechanism of grain refinement by Ti and Ti + B additions is reviewed, with emphasis on the data in support of nucleation by TiAl3.
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