Investigation on the Physical and Chemical Grain Refinement of the Mg-10Sm Alloy

Guang Zong Wang; Da Quan Li; Qiang Zhu

doi:10.4028/www.scientific.net/MSF.816.459

Paper Titles

Effect of Additional Shear Stress on Microstructure Evolution of AZ31 Sheet by Differential Speed Rolling
p.433

Microstructures and Mechanical Properties of Extruded High-Purity Magnesium
p.439

Microstructure Evolution and Mechanical Properties of Mg-3Zn-0.5Er-0.5Al Alloy
p.446

Superplastic Instability and Damage Evolution of AZ31B Magnesium Alloy Shee
p.451

Investigation on the Physical and Chemical Grain Refinement of the Mg-10Sm Alloy
p.459

Effects of Different Species of Sr Additives on as Cast Microstructure and Tensile Properties of AS31 Alloy
p.465

Effective Dispersion of CNTs to Fabricate CNT/Mg Nanocomposite
p.470

Effect of Ce and Homogeneous Annealing on Microstructure and Deformation Performance of ZM21 Alloy
p.476

Influence of Long Period Stacking Ordered Phase on Non-Uniform Deformation in Cast Mg-Zn-Y Alloys
p.481

HomeMaterials Science ForumMaterials Science Forum Vol. 816Investigation on the Physical and Chemical Grain...

Investigation on the Physical and Chemical Grain Refinement of the Mg-10Sm Alloy

Abstract:

In this paper the physical and chemical grain refining of the Mg-10Sm alloy was investigated. Physical grain refinement was achieved by strongly shearing the melt above the liquidus temperature using a twin-screw string device and then cast at the near liquidus temperature. Chemical grain refiner was added into Zr master alloy in the melt. Casting the Mg-10Sm alloy at 730°C produced an extremely coarse microstructure consisting of huge dendritic grains. The physical grain refinement greatly refined the dendritic grains to smaller rosette grains, being reduced from several millimeters to about 200μm. Chemical grain refinement produced fine and equiaxed grain structure with size of approximated 111μm. Combination of the physical and chemical grain refinement creates more significant refining effect than either of the two methods.

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Periodical:

Materials Science Forum (Volume 816)

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459-464

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.816.459

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Online since:

April 2015

Authors:

Guang Zong Wang*, Da Quan Li, Qiang Zhu

Keywords:

Chemical Grain Refinement, Mg-Sm, Physical Grain Refinement

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