Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling
The work looked into the grain refinement process of Mg alloy during asymmetrical rolling with a focus on the role of twin. The present sample was deformed at ambient temperature by single operation with the height reduction of 50% at the roll speed ratio of 1:4 for the upper and lower rolls having...
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MDPI AG
2018-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/8/11/891 |
| _version_ | 1818533505817116672 |
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| author | I Putu Widiantara Hae Woong Yang Muhammad Prisla Kamil Dong Keun Yoon Young Gun Ko |
| author_facet | I Putu Widiantara Hae Woong Yang Muhammad Prisla Kamil Dong Keun Yoon Young Gun Ko |
| author_sort | I Putu Widiantara |
| collection | DOAJ |
| description | The work looked into the grain refinement process of Mg alloy during asymmetrical rolling with a focus on the role of twin. The present sample was deformed at ambient temperature by single operation with the height reduction of 50% at the roll speed ratio of 1:4 for the upper and lower rolls having the same dimension. From the electron backscatter diffraction analysis in the surface region where intense shear strain was imparted, a number of {<inline-formula> <math display="inline"> <semantics> <mrow> <mn>10</mn> <mover accent="true"> <mn>1</mn> <mo>¯</mo> </mover> <mn>2</mn> </mrow> </semantics> </math> </inline-formula>} extension twins with a width of ~1 µm were detected clearly in most of the deformed grains. Moreover, the average misorientation angle of the deformed grains in the top region was found to be ~32°, which was two times higher than that in the center area where the extension twin was detected rarely. As a result, the microstructure in the top region was refined significantly down to be ~1.1 µm with an aid of twin activities that would be discussed in this study. |
| first_indexed | 2024-12-11T17:59:36Z |
| format | Article |
| id | doaj.art-235dc0b626ea45ab93d7144c8c95409a |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-11T17:59:36Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-235dc0b626ea45ab93d7144c8c95409a2022-12-22T00:55:56ZengMDPI AGMetals2075-47012018-11-0181189110.3390/met8110891met8110891Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical RollingI Putu Widiantara0Hae Woong Yang1Muhammad Prisla Kamil2Dong Keun Yoon3Young Gun Ko4Plasticity Control & Mechanical Modeling Lab., School of Materials Science & Engineering, Yeungnam University, Gyeongsan 38541, KoreaPlasticity Control & Mechanical Modeling Lab., School of Materials Science & Engineering, Yeungnam University, Gyeongsan 38541, KoreaPlasticity Control & Mechanical Modeling Lab., School of Materials Science & Engineering, Yeungnam University, Gyeongsan 38541, KoreaPlasticity Control & Mechanical Modeling Lab., School of Materials Science & Engineering, Yeungnam University, Gyeongsan 38541, KoreaPlasticity Control & Mechanical Modeling Lab., School of Materials Science & Engineering, Yeungnam University, Gyeongsan 38541, KoreaThe work looked into the grain refinement process of Mg alloy during asymmetrical rolling with a focus on the role of twin. The present sample was deformed at ambient temperature by single operation with the height reduction of 50% at the roll speed ratio of 1:4 for the upper and lower rolls having the same dimension. From the electron backscatter diffraction analysis in the surface region where intense shear strain was imparted, a number of {<inline-formula> <math display="inline"> <semantics> <mrow> <mn>10</mn> <mover accent="true"> <mn>1</mn> <mo>¯</mo> </mover> <mn>2</mn> </mrow> </semantics> </math> </inline-formula>} extension twins with a width of ~1 µm were detected clearly in most of the deformed grains. Moreover, the average misorientation angle of the deformed grains in the top region was found to be ~32°, which was two times higher than that in the center area where the extension twin was detected rarely. As a result, the microstructure in the top region was refined significantly down to be ~1.1 µm with an aid of twin activities that would be discussed in this study.https://www.mdpi.com/2075-4701/8/11/891Mg alloygrain refinementasymmetrical rollingtwinmisorientation |
| spellingShingle | I Putu Widiantara Hae Woong Yang Muhammad Prisla Kamil Dong Keun Yoon Young Gun Ko Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling Metals Mg alloy grain refinement asymmetrical rolling twin misorientation |
| title | Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling |
| title_full | Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling |
| title_fullStr | Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling |
| title_full_unstemmed | Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling |
| title_short | Grain Refinement by Extension Twin in Mg Alloy during Asymmetrical Rolling |
| title_sort | grain refinement by extension twin in mg alloy during asymmetrical rolling |
| topic | Mg alloy grain refinement asymmetrical rolling twin misorientation |
| url | https://www.mdpi.com/2075-4701/8/11/891 |
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