Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements
Due to its excellent comprehensive performances, Al-Si-Mg alloy i widely used in automotive, transportation and other fields. In this work, tensile performances and fracture behavior of Al-Si-Mg alloy modified by dilute Sc and Sr elements (Al-7.12Si-0.36Mg-0.2Sc-0.005Sr) were investigated at the tem...
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doaj-eb685e03b7ab4ab0b3c4da4151d7b0292020-11-25T01:40:00ZengMDPI AGMaterials1996-19442020-02-0113366510.3390/ma13030665ma13030665Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr ElementsZichen Zhang0Qingfeng Zhao1Lihua Liu2Xingchuan Xia3Cheng Zheng4Liwei Quan5Jian Ding6Xueguang Chen7Xudong Luo8Lisheng Wang9Kaihong Song10Chong Li11Yongchang Liu12School of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaCITIC Dicastal Co., LTD, Qinhuangdao 066011, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaTianjin Zhongwang Aluminium Co., LTD, Tianjin 300300, ChinaCITIC Dicastal Co., LTD, Qinhuangdao 066011, ChinaSchool of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Material Science and Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Material Science and Engineering, Tianjin University, Tianjin 300072, ChinaDue to its excellent comprehensive performances, Al-Si-Mg alloy i widely used in automotive, transportation and other fields. In this work, tensile performances and fracture behavior of Al-Si-Mg alloy modified by dilute Sc and Sr elements (Al-7.12Si-0.36Mg-0.2Sc-0.005Sr) were investigated at the temperature of −60−200 °C for the first time, aiming to obtain a satisfactory thermal stability within a certain temperature range. The results showed that the new designed Al-Si-Mg alloy possessed a completely stable yield strength and a higher-level elongation under the present conditions. Fracture morphology analysis, fracture profile observation and strengthening mechanism analysis were applied to elucidate the evolution mechanisms of yield strength and elongation of the alloy. The fracture modes were significantly distinct in different temperature sections, and the reasons were discussed. In addition, the interaction among the nano precipitate phase particles, the deformation substructure and the dislocations were responsible for the thermal stability of the alloy within a certain temperature range.https://www.mdpi.com/1996-1944/13/3/665al-si-mg alloyprecipitation behaviorheat treatmentmechanical performance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zichen Zhang Qingfeng Zhao Lihua Liu Xingchuan Xia Cheng Zheng Liwei Quan Jian Ding Xueguang Chen Xudong Luo Lisheng Wang Kaihong Song Chong Li Yongchang Liu |
spellingShingle |
Zichen Zhang Qingfeng Zhao Lihua Liu Xingchuan Xia Cheng Zheng Liwei Quan Jian Ding Xueguang Chen Xudong Luo Lisheng Wang Kaihong Song Chong Li Yongchang Liu Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements Materials al-si-mg alloy precipitation behavior heat treatment mechanical performance |
author_facet |
Zichen Zhang Qingfeng Zhao Lihua Liu Xingchuan Xia Cheng Zheng Liwei Quan Jian Ding Xueguang Chen Xudong Luo Lisheng Wang Kaihong Song Chong Li Yongchang Liu |
author_sort |
Zichen Zhang |
title |
Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements |
title_short |
Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements |
title_full |
Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements |
title_fullStr |
Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements |
title_full_unstemmed |
Mechanical Performances of Al-Si-Mg Alloy with Dilute Sc and Sr Elements |
title_sort |
mechanical performances of al-si-mg alloy with dilute sc and sr elements |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-02-01 |
description |
Due to its excellent comprehensive performances, Al-Si-Mg alloy i widely used in automotive, transportation and other fields. In this work, tensile performances and fracture behavior of Al-Si-Mg alloy modified by dilute Sc and Sr elements (Al-7.12Si-0.36Mg-0.2Sc-0.005Sr) were investigated at the temperature of −60−200 °C for the first time, aiming to obtain a satisfactory thermal stability within a certain temperature range. The results showed that the new designed Al-Si-Mg alloy possessed a completely stable yield strength and a higher-level elongation under the present conditions. Fracture morphology analysis, fracture profile observation and strengthening mechanism analysis were applied to elucidate the evolution mechanisms of yield strength and elongation of the alloy. The fracture modes were significantly distinct in different temperature sections, and the reasons were discussed. In addition, the interaction among the nano precipitate phase particles, the deformation substructure and the dislocations were responsible for the thermal stability of the alloy within a certain temperature range. |
topic |
al-si-mg alloy precipitation behavior heat treatment mechanical performance |
url |
https://www.mdpi.com/1996-1944/13/3/665 |
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