Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion
In current study; the effect of various Gadolinium (Gd) additions on the microstructure and sliding wear behaviour of Al-15%Mg2Si composite before and after the hot extrusion process was examined. Optical microscopy (OM), scanning electron microscopy (SEM) equipped with EDX facility and X-ray diffra...
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my.utm.1027622023-09-24T03:06:12Z http://eprints.utm.my/id/eprint/102762/ Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion Ghandvar, Hamidreza Jabbar, Mostafa Abbas Bahador, Abdollah Abu Bakar, Tuty Asma Fadil, Nor Akmal Kondoh, Katsuyoshi TJ Mechanical engineering and machinery In current study; the effect of various Gadolinium (Gd) additions on the microstructure and sliding wear behaviour of Al-15%Mg2Si composite before and after the hot extrusion process was examined. Optical microscopy (OM), scanning electron microscopy (SEM) equipped with EDX facility and X-ray diffraction (XRD) were used to characterize the microstructure. The results showed that with addition of 1.0 wt.% Gd to Al-15%Mg2Si composite, the primary Mg2Si particles size reduced from 44 µm to 23 µm and its morphology altered from dendritic to polygonal shape. Further refinement of primary Mg2Si particles was achieved after conducting hot extrusion which resulted in a decrease in its size to 19 µm with a transfer to near-spherical morphology. The Vickers hardness value increased from 55.6 HV in the as-cast and unmodified composite to 72.9 HV in the extruded 1.0% Gd modified composite. The wear test results revealed that composites treated with Gd possess higher wear resistance in comparison with those of without Gd. The highest wear resistance obtained with the lowest wear rates of 0.19 mm3/km and 0.14 mm3/km in the Al-15%Mg2Si-1.0% Gd before and after the hot extrusion, respectively. The high wear resistance of extruded Gd-modified Al-15%Mg2Si composite is due to the refinement of primary Mg2Si particles with uniform distribution in the composite matrix along with fragmentation of Gd intermetallic compounds. MDPI 2022-01 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/102762/1/HamidrezaGhandvar2022_MicrostructureExaminationandSlidingWearBehavior.pdf Ghandvar, Hamidreza and Jabbar, Mostafa Abbas and Bahador, Abdollah and Abu Bakar, Tuty Asma and Fadil, Nor Akmal and Kondoh, Katsuyoshi (2022) Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion. Lubricants, 10 (1). pp. 1-13. ISSN 2075-4442 http://dx.doi.org/10.3390/lubricants10010003 DOI:10.3390/lubricants10010003 |
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TJ Mechanical engineering and machinery Ghandvar, Hamidreza Jabbar, Mostafa Abbas Bahador, Abdollah Abu Bakar, Tuty Asma Fadil, Nor Akmal Kondoh, Katsuyoshi Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
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In current study; the effect of various Gadolinium (Gd) additions on the microstructure and sliding wear behaviour of Al-15%Mg2Si composite before and after the hot extrusion process was examined. Optical microscopy (OM), scanning electron microscopy (SEM) equipped with EDX facility and X-ray diffraction (XRD) were used to characterize the microstructure. The results showed that with addition of 1.0 wt.% Gd to Al-15%Mg2Si composite, the primary Mg2Si particles size reduced from 44 µm to 23 µm and its morphology altered from dendritic to polygonal shape. Further refinement of primary Mg2Si particles was achieved after conducting hot extrusion which resulted in a decrease in its size to 19 µm with a transfer to near-spherical morphology. The Vickers hardness value increased from 55.6 HV in the as-cast and unmodified composite to 72.9 HV in the extruded 1.0% Gd modified composite. The wear test results revealed that composites treated with Gd possess higher wear resistance in comparison with those of without Gd. The highest wear resistance obtained with the lowest wear rates of 0.19 mm3/km and 0.14 mm3/km in the Al-15%Mg2Si-1.0% Gd before and after the hot extrusion, respectively. The high wear resistance of extruded Gd-modified Al-15%Mg2Si composite is due to the refinement of primary Mg2Si particles with uniform distribution in the composite matrix along with fragmentation of Gd intermetallic compounds. |
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Article |
author |
Ghandvar, Hamidreza Jabbar, Mostafa Abbas Bahador, Abdollah Abu Bakar, Tuty Asma Fadil, Nor Akmal Kondoh, Katsuyoshi |
author_facet |
Ghandvar, Hamidreza Jabbar, Mostafa Abbas Bahador, Abdollah Abu Bakar, Tuty Asma Fadil, Nor Akmal Kondoh, Katsuyoshi |
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Ghandvar, Hamidreza |
title |
Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
title_short |
Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
title_full |
Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
title_fullStr |
Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
title_full_unstemmed |
Microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
title_sort |
microstructure examination and sliding wear behavior of al-15%mg2si-xgd in situ composites before and after hot extrusion |
publisher |
MDPI |
publishDate |
2022 |
url |
http://eprints.utm.my/id/eprint/102762/1/HamidrezaGhandvar2022_MicrostructureExaminationandSlidingWearBehavior.pdf http://eprints.utm.my/id/eprint/102762/ http://dx.doi.org/10.3390/lubricants10010003 |
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