A review: Past, present and future of grain refining of magnesium castings

Karakulak, Erdem

doi:10.1016/j.jma.2019.05.001

Cited by 143 publications

(49 citation statements)

References 164 publications

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“…This enhances the mechanical and electrochemical properties. 52 A few review articles are also available for the grain renement of magnesium and aluminum alloys. To the best of our knowledge, no review article is available on the topic of renement in magnesium and aluminum alloys with an in situformed Mg 2 Si phase.…”

Section: Mg 2 Si Phase Refinement Methodsmentioning

confidence: 99%

“…Some other methods are also available for the renement of magnesium and aluminum alloys, such as the physical grain renement method, 65 the agitation method, 52 the Elnal process (FeCl 3 ), 65 carbon inoculation 52,65 and the powder metallurgy 17 process. However, in these methods insufficient reports are available for renement of the Mg 2 Si phase in magnesium and aluminum alloys.…”

Section: Other Methodsmentioning

confidence: 99%

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Structure and mechanical behavior ofin situdeveloped Mg₂Si phase in magnesium and aluminum alloys – a review

Seth

Kumar

2020

RSC Adv.

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Section: Mg 2 Si Phase Refinement Methodsmentioning

confidence: 99%

Section: Other Methodsmentioning

confidence: 99%

Structure and mechanical behavior ofin situdeveloped Mg₂Si phase in magnesium and aluminum alloys – a review

Seth

Kumar

2020

RSC Adv.

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“…During hot deformation, a fine grain size of ingot before plastic forming is important for the subsequent mechanical properties. However, one major issue of Mg-Al alloy is that grain refinement during casting is still difficult, although various approaches have been trialed over the last decades, such as solute element addition, superheating, Elfinal and carbon inoculation (Ref [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of As-Extruded AZ31−xSm Magnesium Alloy

Sun

Liu

Zhang

et al. 2020

J. of Materi Eng and Perform

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The effects of Samarium (Sm) on the microstructures and mechanical properties of as-extruded AZ31 Mg alloy have been investigated. It is shown that the grain size changes in a non-monotonic mode of firstly coarsening and then refining, where the alloys with 0 $ 1.18wt.%Sm have bimodal grain structure consisted of dynamic recrystallized (DRXed) grains and unDRXed grains, while the alloys with 2.17 $ 3.13wt.%Sm have fully DRXed fine grains. A fine as-cast microstructure produces a finer extruded microstructure, and a large amount of tiny Al 11 Sm 3 particle is necessary to generate DRXed grains through particle-stimulated nucleation (PSN) effect. However, bigger Al 2 Sm particles can lead to increase in both area fraction of larger grains (above 40 lm) and texture, due to less effective in both PSN effect and suppressing DRXed grain growth. Grain refinement, secondary phase distribution and texture are important factors determining the mechanical properties of extruded alloys. Due to the fine grains, large amount of tiny secondary phase and suitable texture intensity, alloy with 3.13%Sm has the best mechanical property (i.e., YS 198 MPa, UTS 272 MPa and elongation 10%).

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“…As the lightest engineering materials, magnesium alloys have been extensively used in aerospace, automobile industry and 3 C products due to their low density, high specific strength, excellent damping capacity and easy recovery [1][2][3]. Because of the specific chemical and physical characteristics of magnesium alloys, e.g.…”

Section: Introductionmentioning

confidence: 99%

Research for microstructure and mechanical properties of AZ91 magnesium alloy welded joint with magnetic field and activated flux

Zhang

Ren

2020

Mater. Res. Express

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Although many experimental researches have been carried out on the effect of different fluxes and the mechanism responsible for the higher penetration in activated TIG welding of magnesium alloy, few works as reported in literatures are available concering the grain refinement and the improvement of mechanical properties of welding joints. This is because the activated flux has very limited or even negative effects on improving the mechanical properties of welded joints. In order to find a method that can improve welding efficiency and mechanical properties of welded joints, the longitudinal alternating magnetic field and NiCl 2 activated flux were used during TIG welding of AZ91 magnesium alloy. The formation, mechanical properties, phase composition and crystal growth pattern of the weld seam were tested and analyzed to study the mechanism. The experimental results reveal that with proper parameter matching (magnetic field and activated flux), larger weld penetration and smaller form factor can be obtained, welding efficiency is improved accordingly, but the form factor with the magnetic field is bigger than that without magnetic field. When the activated flux amount is 3 mg cm −2 with the magnetic field, the optimal value of mechanical properties of welded joint is obtained, tensile strength is 385 MPa, elongation is 13.3%, micohardness is 67 HV, respectively. All of these are better than those without the magnetic field, the optimal activated flux amount is 2 mg cm −2 . The application of magnetic field and activated flux has no noticeable effect on the phase composition of weld seam. Under the combined action of magnetic field and activated flux, the crystallization nucleation condition of molten pool was changed, the grain size was refined, the formation of twins was promoted, and the crystals selectively grew within the basal (0001) plane.

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A review: Past, present and future of grain refining of magnesium castings

Cited by 143 publications

References 164 publications

Structure and mechanical behavior ofin situdeveloped Mg₂Si phase in magnesium and aluminum alloys – a review

Structure and mechanical behavior ofin situdeveloped Mg₂Si phase in magnesium and aluminum alloys – a review

Microstructures and Mechanical Properties of As-Extruded AZ31−xSm Magnesium Alloy

Research for microstructure and mechanical properties of AZ91 magnesium alloy welded joint with magnetic field and activated flux

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A review: Past, present and future of grain refining of magnesium castings

Cited by 143 publications

References 164 publications

Structure and mechanical behavior ofin situdeveloped Mg2Si phase in magnesium and aluminum alloys – a review

Structure and mechanical behavior ofin situdeveloped Mg2Si phase in magnesium and aluminum alloys – a review

Microstructures and Mechanical Properties of As-Extruded AZ31−xSm Magnesium Alloy

Research for microstructure and mechanical properties of AZ91 magnesium alloy welded joint with magnetic field and activated flux

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Structure and mechanical behavior ofin situdeveloped Mg₂Si phase in magnesium and aluminum alloys – a review

Structure and mechanical behavior ofin situdeveloped Mg₂Si phase in magnesium and aluminum alloys – a review