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Microstructural evolution and wear characteristics of equal channel angular pressing processed semi-solid-cast hypoeutectic aluminum alloys
https://orcid.org/0000-0003-0995-5412
Graphical abstract Display Omitted
Highlights We produced aluminum feedstock for ECAP by two casting techniques: conventional and with cooling slope. Globular α-Al phase was found in cooling slope sample compared to dendritic in the conventional. After ECAP uniform Si particles distribution and fine α-Al were observed for cooling slope. We observed significant improvement in wear resistance of ECAPed sample produced by cooling slope.
Abstract This work investigated the microstructural evolution of Al–7Si–Mg alloy cast semi-solid using a cooling slope as well as conventional casting followed by equal channel angular pressing (ECAP) in a 120° die. Feed materials were prepared for ECAP by cooling slope casting and by conventional casting. The microstructure of the processed alloys extruded was observed by optical microscope and by transmission electron microscope, and their hardness and wear resistance were evaluated. After ECAP processing, the primary α-Al phase tended to be elongated while the Si particles became fragmented and more nearly globular in shape and uniform in size than in the as-cast sample. The microstructure of the cooling slope-cast ECAPed samples was more homogenous than that of the conventionally cast ECAPed sample. The α-Al phase sub-grains were refined to sub-micrometer sizes for samples cast by both methods after ECAP. The hardness of the cooling slope-cast ECAPed sample was also higher than that of the conventionally cast ECAPed sample. The wear resistance of the alloy improved after cooling slope casting and ECAP processing.
Microstructural evolution and wear characteristics of equal channel angular pressing processed semi-solid-cast hypoeutectic aluminum alloys
https://orcid.org/0000-0003-0995-5412
Graphical abstract Display Omitted
Highlights We produced aluminum feedstock for ECAP by two casting techniques: conventional and with cooling slope. Globular α-Al phase was found in cooling slope sample compared to dendritic in the conventional. After ECAP uniform Si particles distribution and fine α-Al were observed for cooling slope. We observed significant improvement in wear resistance of ECAPed sample produced by cooling slope.
Abstract This work investigated the microstructural evolution of Al–7Si–Mg alloy cast semi-solid using a cooling slope as well as conventional casting followed by equal channel angular pressing (ECAP) in a 120° die. Feed materials were prepared for ECAP by cooling slope casting and by conventional casting. The microstructure of the processed alloys extruded was observed by optical microscope and by transmission electron microscope, and their hardness and wear resistance were evaluated. After ECAP processing, the primary α-Al phase tended to be elongated while the Si particles became fragmented and more nearly globular in shape and uniform in size than in the as-cast sample. The microstructure of the cooling slope-cast ECAPed samples was more homogenous than that of the conventionally cast ECAPed sample. The α-Al phase sub-grains were refined to sub-micrometer sizes for samples cast by both methods after ECAP. The hardness of the cooling slope-cast ECAPed sample was also higher than that of the conventionally cast ECAPed sample. The wear resistance of the alloy improved after cooling slope casting and ECAP processing.
Microstructural evolution and wear characteristics of equal channel angular pressing processed semi-solid-cast hypoeutectic aluminum alloys
https://orcid.org/0000-0003-0995-5412
Graphical abstract Display Omitted
Highlights We produced aluminum feedstock for ECAP by two casting techniques: conventional and with cooling slope. Globular α-Al phase was found in cooling slope sample compared to dendritic in the conventional. After ECAP uniform Si particles distribution and fine α-Al were observed for cooling slope. We observed significant improvement in wear resistance of ECAPed sample produced by cooling slope.
Abstract This work investigated the microstructural evolution of Al–7Si–Mg alloy cast semi-solid using a cooling slope as well as conventional casting followed by equal channel angular pressing (ECAP) in a 120° die. Feed materials were prepared for ECAP by cooling slope casting and by conventional casting. The microstructure of the processed alloys extruded was observed by optical microscope and by transmission electron microscope, and their hardness and wear resistance were evaluated. After ECAP processing, the primary α-Al phase tended to be elongated while the Si particles became fragmented and more nearly globular in shape and uniform in size than in the as-cast sample. The microstructure of the cooling slope-cast ECAPed samples was more homogenous than that of the conventionally cast ECAPed sample. The α-Al phase sub-grains were refined to sub-micrometer sizes for samples cast by both methods after ECAP. The hardness of the cooling slope-cast ECAPed sample was also higher than that of the conventionally cast ECAPed sample. The wear resistance of the alloy improved after cooling slope casting and ECAP processing.
Microstructural evolution and wear characteristics of equal channel angular pressing processed semi-solid-cast hypoeutectic aluminum alloys
Thuong, Nguyen Van (author) / Zuhailawati, Hussain (author) / Seman, Anasyida Abu (author) / Huy, Tran Duc (author) / Dhindaw, Brij Kumar (author)
2014-11-27
9 pages
Article (Journal)
Electronic Resource
English
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