Calcium increases grain refinement, which helps in controlling the metallurgy of the alloy . Appliions Magnesium alloys cover a wide array of appliions, from automotive and aerospace appliions to electronic and biomedical uses. Structural appliions
Microstructure (including its uniformity), texture, and mechanical properties of Mg-Al-Zn-Mn alloy billets after radial-shear rolling (RSR) were investigated. RSR with the temperature in the interval 420–140 °C and true strain up to 2.63 was shown to lead to grain refinement down to 1.5–3.5 μm (as determined by optical microscopy).
Abstract Although refinement of the as‐cast grain size of magnesium alloys by Zr is well established commercially, little research has been undertaken to optimize this refinement
Most zirconium-containing commercial magnesium alloys also contain zinc, which varies from similar to 0.5% to similar to 6.5% depending upon the given alloy system. Early work has suggested that the presence of zinc in the range from 3% to 5% could significantly increase the solubility of zirconium in magnesium, therefore enhancing the gain refinement of the final alloy by zirconium.
Grain-refinement mechanisms in titanium alloys - Volume 23 Issue 1 - M.J. Bermingham, S.D. McDonald, M.S. Dargusch, D.H. StJohn Despite the importance of the prior-β grain structure in determining the properties of titanium-based alloys, there are few published
of AZ31 magnesium alloy. The simulation results and calculated Zener-Hollomon parameters showed that the grains of magnesium would be refined gradually during ES process. Keywords: AZ31 magnesium alloy, finite element modeling, grain refinement
The influence of CaO addition on grain refinement of cast magnesium alloys Ali, Y, Qiu, D, Jiang, B, Pan, F and Zhang, M 2016, ''The influence of CaO addition on grain refinement of cast magnesium alloys'', Scripta Materialia, vol. 114, pp. 103-107.
alloy. 1.3 Grain Refinement of Light Alloys This study involves the grain refinement of light alloys like magnesium and aluminium. The use of this alloy plays an important role in achieving the relative grain size. The resulting grain size varies from few μm on
Grain refinement in AZ31 magnesium alloy has been attempted by hot-rolling and annealing process. Two types of AZ31 alloys were used, in which manganese concentrations were different one another, 0.003 and 0.4 mass%. They are called AZ31 and AZ31.
In order to improve the ductility or formability of a magnesium alloy, addition of rare earth elements or refinement of grain size is often used. However, conventional additional elements inhibit the action of grain boundary sliding for complementing plastic deformation.
Grain refinement of Sn–Pb alloy under a novel coined pulsed magnetic field during solidifiion. Journal of Materials Processing Technology, Vol. 211, Issue. 3, p. 463. CrossRef
Magnesium alloys take a special place among the hydrogen storage materials, mainly due to their high gravimetric (7.6 mass %) and volumetric (110 kg m−3) hydrogen storage capacity. Unfortunately, the kinetics of hydrogenation and hydrogen release are rather slow, which limits practical use of magnesium-based materials for hydrogen and heat storage. Refining the microstructure of magnesium
Request PDF | Grain refinement in AZ91 magnesium alloy during thermomechanical processing | Microstructural changes during high-temperature extrusion and torsion of an AZ91 alloy (Mg–9Al–1Zn
Magnesium alloys are generally brittle owing to their HCP structure. In this study, improvement of tensile mechanical properties under dynamic loading has been demonstrated for a pure magnesium and a ZK60 magnesium alloy. The solution-treated ZK60 alloy
Grain Refinement of Magnesium Alloys by Mg-Zr Master Alloys: The Role of Alloy Chemistry and Zr Particle Nuer Density
Grain refinement only takes place in the aluminium-containing alloys with the grain size of 1 wt.% Al and 3 wt.% Al alloy being reduced to 103 μm and 110 μm, respectively. The aluminium-free alloy had a large grain size of 190 μ m [ 12 , 39 ].
Grain-refinement-of-AZ91D-magnesium-alloy-by-Al-Ti-B-master-alloy-and-its-effect-on-mechanical - VIP VIP 100w VIP
Solidifiion experiment of Mg-4Y-3Nd-1.2Al (wt%) alloy cast in a step-like sand-mold casting shows that a slow cooling rather than a fast cooling leads to grain refinement during solidifiion with in-situ formed nucleant particles (Al2RE) in molten melt. A two
Results showed that the addition of 0.6% TiBAl had the strongest grain refinement effect, reducing the grain sizes by 54.5 and 48.5% in the extruded and ECAPed conditions, respectively. The observed grain refinement was partly due to the presence of the thermally-stable micron- and submicron-sized particles in the melt which act as nucleation sites during solidifiion.
A New Analytical Methodology for the Assessment of Grain Refinement in Magnesium Alloys D.H. StJohn, Peng Cao, Ma Qian, M.A. Easton Kainer, KU editor (2006) Magnesium: Proceedings of the 7th International Conference on Magnesium Alloys and Their
A New Method for Grain Refinement in Magnesium Alloy- High Speed Extrusion Machining - Free download as PDF File (.pdf), Text File (.txt) or read online for free. grain
Grain refinement of AZ31 magnesium alloy by Al-Ti-C-Y master alloy___ 40|1 Grain refinement of AZ31 magnesium alloy by Al-Ti-C-Y master alloy___。JOURNAL OF RARE EARTHS, Vol. 26, No. 4, Aug
12/4/2016· Ultrasonic degassing & grain refinement in Molten Aluminium, Magnesium, Copper and Glass metal melts up to 1,800 C, can substantially improve the properties of castings, in particular, their
grain refinement, it has been shown by a recent work , that fine and spherical primary magnesium crystals are obtained directly from the liquid state by grain refinement without any
In this study, intensive melt shearing was achieved in a twin-screw mechanism to investigate its grain refining effect on AZ91D magnesium alloy. The refinement mechanism was discussed and the persistence of grain refinement after remelting and isothermal holding was also studied.
Grain Refinement of AZ91D Magnesium Alloy by MgCO 3 Ti Jun Chen*, Xiang Dong Jiang, Ying Ma, Rui Quan Wang, Yuan Hao Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China The grain