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Journal of Materials Engineering and Performance, 2021
Based on the hot compression experiment of GH4169 superalloy, the constitutive equation and the microstructure evolution model of GH4169 superalloy were established, and they were introduced into the Deform® simulation software to realize the simulation of the microstructure evolution of GH4169 superalloy in closed multidirectional forging, single ...
Yongbo Jin +4 more
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Based on the hot compression experiment of GH4169 superalloy, the constitutive equation and the microstructure evolution model of GH4169 superalloy were established, and they were introduced into the Deform® simulation software to realize the simulation of the microstructure evolution of GH4169 superalloy in closed multidirectional forging, single ...
Yongbo Jin +4 more
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Fine-Grained Structure Formation in 7475 Al Alloy during Hot Multidirectional Forging
Materials Science Forum, 2006Effect of strain rate on grain refinement was studied in multidirectional forging (MDF) of a coarse-grained 7475 Al alloy at 490oC under strain rates of 3 × 10-4 s-1 and 3 × 10-2 s-1. At a strain rate of 3 × 10-4 s-1, the stress – strain ( σ - ε) behavior shows significant work softening just after yielding and a steady-state flow at higher strains ...
Alexandre Goloborodko +3 more
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Materials Science and Engineering: A, 2010
Abstract A particulate reinforced magnesium matrix composite fabricated by stir casting was subjected to multidirectional forging (MDF) at a temperature of 420 °C. The results showed that grains of matrix in the composite were significantly refined after 1 MDF pass, and gradually refined till 3 MDF passes.
K.B. Nie +5 more
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Abstract A particulate reinforced magnesium matrix composite fabricated by stir casting was subjected to multidirectional forging (MDF) at a temperature of 420 °C. The results showed that grains of matrix in the composite were significantly refined after 1 MDF pass, and gradually refined till 3 MDF passes.
K.B. Nie +5 more
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Vacuum, 2021
Abstract In this paper, the enhanced mechanical properties and strengthening mechanism of ultrafine-lamella 304 L stainless steel prepared through multidirectional hot forging process are investigated. This ultrafine-lamella structure has an excellent combination of strength and ductility.
Jiachen Sun +12 more
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Abstract In this paper, the enhanced mechanical properties and strengthening mechanism of ultrafine-lamella 304 L stainless steel prepared through multidirectional hot forging process are investigated. This ultrafine-lamella structure has an excellent combination of strength and ductility.
Jiachen Sun +12 more
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Materials Science Forum, 2005
Grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) at a strain rate of 3×10-3s-1 with decreasing temperature from 623K to 423K. The MDF was carried out up to large cumulative strains with changing the loading direction during decreasing temperature from pass to pass.
Jie Xing +3 more
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Grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) at a strain rate of 3×10-3s-1 with decreasing temperature from 623K to 423K. The MDF was carried out up to large cumulative strains with changing the loading direction during decreasing temperature from pass to pass.
Jie Xing +3 more
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AIP Conference Proceedings, 2020
Ultrafine grain of metals can be obtained through severe plastic deformation techniques. One of the severe plastic deformation techniques is multidirectional forging, in which multiple forging is applied on a workpiece in three orthogonal directions. In this study, the multidirectional forging, with varying die dimensions, each with a single press on ...
Fethma M. Nor +3 more
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Ultrafine grain of metals can be obtained through severe plastic deformation techniques. One of the severe plastic deformation techniques is multidirectional forging, in which multiple forging is applied on a workpiece in three orthogonal directions. In this study, the multidirectional forging, with varying die dimensions, each with a single press on ...
Fethma M. Nor +3 more
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Controlling the microstructure and strength of copper submitted to multidirectional forging
Materials Science and TechnologySevere plastic deformation (SPD) techniques have been widely used to enhance strength and promote grain refinement in metals. Multi-Directional Forging (MDF), based on successive compressions with strain path changes, enables tailoring of microstructure and mechanical properties by controlling strain amplitude (Δ ɛ )
Maria Elisa Landim Nassif +6 more
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Journal of Alloys and Compounds, 2019
Abstract The as-cast Mg-4Zn-2Gd-0.5Ca alloy mainly contained I phase and W phase, while the I phase dissolved into Mg substrate after homogenization treatment which improved the alloy’s corrosion resistance. After the application of multidirectional forging (MDF), the grains were refined obviously accompanied with the precipitation of I phase.
Fang-fang Cao +4 more
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Abstract The as-cast Mg-4Zn-2Gd-0.5Ca alloy mainly contained I phase and W phase, while the I phase dissolved into Mg substrate after homogenization treatment which improved the alloy’s corrosion resistance. After the application of multidirectional forging (MDF), the grains were refined obviously accompanied with the precipitation of I phase.
Fang-fang Cao +4 more
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Journal of Materials Engineering and Performance, 2019
Multidirectional forging (MDF) was applied to Mg-6%Zn alloy up to 5 passes successfully at 280 °C. MDF-processed materials were characterized using optical microscope, scanning electron microscope, electron backscatter diffraction, transmission electron microscope, and x-ray diffraction. Obtained results showed a significant reduction in grain size (up
S. Ramesh +4 more
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Multidirectional forging (MDF) was applied to Mg-6%Zn alloy up to 5 passes successfully at 280 °C. MDF-processed materials were characterized using optical microscope, scanning electron microscope, electron backscatter diffraction, transmission electron microscope, and x-ray diffraction. Obtained results showed a significant reduction in grain size (up
S. Ramesh +4 more
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Journal of Alloys and Compounds, 2015
Abstract A particulate reinforced magnesium matrix nanocomposite was subjected to multidirectional forging (MDF). The results showed that the microstructure of the nanocomposite mainly consisted of some large initial grains and fine recrystallized grains along initial grain boundaries after 1 MDF pass.
K.B. Nie +6 more
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Abstract A particulate reinforced magnesium matrix nanocomposite was subjected to multidirectional forging (MDF). The results showed that the microstructure of the nanocomposite mainly consisted of some large initial grains and fine recrystallized grains along initial grain boundaries after 1 MDF pass.
K.B. Nie +6 more
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