Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys
In the present study, the effect of annealing treatment on the room-temperature mechanical performance of AZ61, AZ61-0.5CaO and AZ61-1CaO was thoroughly investigated. The as-rolled samples were annealed at 400 °C for 1 h followed by furnace cooling. Microstructural characterization was carried out u...
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MDPI AG
2023-12-01
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| author | Umer Masood Chaudry Hafiz Muhammad Rehan Tariq Nooruddin Ansari Adil Mansoor Muhammad Kashif Khan Kotiba Hamad Tea-Sung Jun |
| author_facet | Umer Masood Chaudry Hafiz Muhammad Rehan Tariq Nooruddin Ansari Adil Mansoor Muhammad Kashif Khan Kotiba Hamad Tea-Sung Jun |
| author_sort | Umer Masood Chaudry |
| collection | DOAJ |
| description | In the present study, the effect of annealing treatment on the room-temperature mechanical performance of AZ61, AZ61-0.5CaO and AZ61-1CaO was thoroughly investigated. The as-rolled samples were annealed at 400 °C for 1 h followed by furnace cooling. Microstructural characterization was carried out using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron back-scattered diffraction (EBSD). Moreover, room-temperature uniaxial tensile tests were carried out on the non-annealed and annealed samples along the rolling direction at the strain rate of 10<sup>−3</sup> s<sup>−1</sup>. Microstructural analysis showed the presence of profuse <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>{</mo><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>2</mn><mo>}</mo></mrow></semantics></math></inline-formula> twinning in non-annealed samples and the twinning fraction was increased by the addition of CaO content. SEM showed the formation of precipitates in the AZ61-CaO alloys and TEM confirmed the precipitates to be (Mg, Al)<sub>2</sub>Ca. The room-temperature tensile tests showed that the mechanical properties of AZ61 were slightly reduced by the addition of CaO, which was attributed to the higher local stress concentration due to the twin–twin interactions. Furthermore, the annealing treatment led to significant enhancement in the YS and UTS of AZ61-1CaO, which is related to the precipitation hardening induced by the intermetallic precipitates. |
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| spelling | doaj.art-5f8d41f667834cae8fdfcd7afd1679692023-12-22T14:24:40ZengMDPI AGMetals2075-47012023-12-011312196210.3390/met13121962Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO AlloysUmer Masood Chaudry0Hafiz Muhammad Rehan Tariq1Nooruddin Ansari2Adil Mansoor3Muhammad Kashif Khan4Kotiba Hamad5Tea-Sung Jun6Department of Mechanical Engineering, Incheon National University, Incheon 22012, Republic of KoreaDepartment of Mechanical Engineering, Incheon National University, Incheon 22012, Republic of KoreaDepartment of Materials Science & Engineering, Chungnam National University, Daejeon 34134, Republic of KoreaCollege of Physics and Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, ChinaSchool of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of KoreaSchool of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Republic of KoreaDepartment of Mechanical Engineering, Incheon National University, Incheon 22012, Republic of KoreaIn the present study, the effect of annealing treatment on the room-temperature mechanical performance of AZ61, AZ61-0.5CaO and AZ61-1CaO was thoroughly investigated. The as-rolled samples were annealed at 400 °C for 1 h followed by furnace cooling. Microstructural characterization was carried out using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron back-scattered diffraction (EBSD). Moreover, room-temperature uniaxial tensile tests were carried out on the non-annealed and annealed samples along the rolling direction at the strain rate of 10<sup>−3</sup> s<sup>−1</sup>. Microstructural analysis showed the presence of profuse <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>{</mo><mn>10</mn><mover accent="true"><mrow><mn>1</mn></mrow><mo>¯</mo></mover><mn>2</mn><mo>}</mo></mrow></semantics></math></inline-formula> twinning in non-annealed samples and the twinning fraction was increased by the addition of CaO content. SEM showed the formation of precipitates in the AZ61-CaO alloys and TEM confirmed the precipitates to be (Mg, Al)<sub>2</sub>Ca. The room-temperature tensile tests showed that the mechanical properties of AZ61 were slightly reduced by the addition of CaO, which was attributed to the higher local stress concentration due to the twin–twin interactions. Furthermore, the annealing treatment led to significant enhancement in the YS and UTS of AZ61-1CaO, which is related to the precipitation hardening induced by the intermetallic precipitates.https://www.mdpi.com/2075-4701/13/12/1962magnesiumstrengthtextureAZ61Mg-CaO alloysheat treatments |
| spellingShingle | Umer Masood Chaudry Hafiz Muhammad Rehan Tariq Nooruddin Ansari Adil Mansoor Muhammad Kashif Khan Kotiba Hamad Tea-Sung Jun Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys Metals magnesium strength texture AZ61 Mg-CaO alloys heat treatments |
| title | Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys |
| title_full | Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys |
| title_fullStr | Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys |
| title_full_unstemmed | Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys |
| title_short | Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys |
| title_sort | effect of cao content and annealing treatment on the room temperature mechanical properties of az61 and az61 cao alloys |
| topic | magnesium strength texture AZ61 Mg-CaO alloys heat treatments |
| url | https://www.mdpi.com/2075-4701/13/12/1962 |
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