Institutional Repository of Coll Mat Sci & Engn
Effect of La and Sc Co-Addition on the Mechanical Properties and Thermal Conductivity of As-Cast Al-4.8% Cu Alloys | |
Song, Zhao-Xi1; Li, Yuan-Dong1,2; Liu, Wen-Jing1; Yang, Hao-Kun1; Cao, Yang-Jing1; Bi, Guang-Li1,2 | |
2021-11 | |
发表期刊 | METALS |
卷号 | 11期号:11 |
摘要 | The effects of La and La+Sc addition on mechanical properties and thermal conductivity of Al-4.8Cu alloy were comprehensively studied. The as-cast samples were characterized by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and first-principles methods. The results reveal that the grain morphology of Al-4.8Cu alloy changes from dendrite to fine equiaxed grain with La, La+Sc addition. The average grain size of Al-Cu-La (Al-4.8Cu-0.4La) and Al-Cu-La-Sc (Al-4.8Cu-0.4La-0.4Sc) decreased by 37.2% (70.36 mu m) and 63.3% (119.64 mu m) respectively compared with Al-Cu (Al-4.8Cu). Al-Cu-La has the highest elongation among the three which is 34.4% (2.65%) higher than Al-Cu. Al-Cu-La-Sc has the highest ultimate tensile strength and yield strength which are 55.1% (80.9 MPa) and 65.2% (62.1 MPa) higher than Al-Cu, respectively. The thermal conductivity of Al-Cu-La and Al-Cu-La-Sc is 10.0% (18.797 W center dot m(-1)center dot k(-1)) and 6.5% (12.178 W center dot m(-1)center dot k(-1)) higher than Al-Cu alloy respectively. Compared with Al-Cu, Al-Cu-La has less shrinkage and porosity, the presence of Al4La and AlCu3 contribute a lot to the decrease of specific heat capacity and the increase of plasticity and toughness. The porosity of Al-Cu-La-Sc does not significantly decrease compared with Al-Cu-La, the presence of Al3Sc and AlCuSc bring about the increase of specific heat capacity and brittleness. |
关键词 | Al-Cu alloy mircrostructure mechanical properties thermal conductivity first-principles |
DOI | 10.3390/met11111866 |
收录类别 | SCIE |
语种 | 英语 |
WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
WOS记录号 | WOS:000815300700001 |
出版者 | MDPI |
来源库 | WOS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/158858 |
专题 | 材料科学与工程学院 |
通讯作者 | Li, Yuan-Dong |
作者单位 | 1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Key Lab Non Ferrous Met Alloys & Proc, Minist Educ, Lanzhou 730050, Peoples R China |
第一作者单位 | 省部共建有色金属先进加工与再利用国家重点实验室 |
通讯作者单位 | 省部共建有色金属先进加工与再利用国家重点实验室; 兰州理工大学 |
第一作者的第一单位 | 省部共建有色金属先进加工与再利用国家重点实验室 |
推荐引用方式 GB/T 7714 | Song, Zhao-Xi,Li, Yuan-Dong,Liu, Wen-Jing,et al. Effect of La and Sc Co-Addition on the Mechanical Properties and Thermal Conductivity of As-Cast Al-4.8% Cu Alloys[J]. METALS,2021,11(11). |
APA | Song, Zhao-Xi,Li, Yuan-Dong,Liu, Wen-Jing,Yang, Hao-Kun,Cao, Yang-Jing,&Bi, Guang-Li.(2021).Effect of La and Sc Co-Addition on the Mechanical Properties and Thermal Conductivity of As-Cast Al-4.8% Cu Alloys.METALS,11(11). |
MLA | Song, Zhao-Xi,et al."Effect of La and Sc Co-Addition on the Mechanical Properties and Thermal Conductivity of As-Cast Al-4.8% Cu Alloys".METALS 11.11(2021). |
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