Effects of (Si+Mn) / Fe on Microstructures and Mechanical Properties of As⁃cast Al⁃5Cu Alloys

被引：0
|
作者：
Hu W. [1 ,2 ]
Guo H. [1 ,2 ]
Deng B. [1 ,2 ]
Yang K. [1 ,2 ]
Yu C. [1 ,2 ]
机构：
[1] School of Physics and Materials, Nanchang University, Nanchang
[2] Key Lab for Net Forming in Jiangxi Province, Nanchang University, Nanchang
来源：
Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 11期
基金：
中国国家自然科学基金;
关键词：
(Si + Mn) / Fe mass ratio; Al⁃Cu casting alloy; Fe⁃rich intermetallic; mechanical property;
D O I：
10.11896/cldb.21100008
中图分类号：
学科分类号：
摘要：
The effect of mass ratio of (Si+Mn) / Fe(K=3, 4, 5 and 6) on the As⁃cast microstructure and mechanical properties of Al⁃5Cu⁃0.3Fe high⁃ strength cast alloy were studied by OM, SEM, EDS and DSC. The results show that the evolution order of the Fe⁃rich intermetallic morphology is needle⁃like, Chinese script, aggregated Chinese script with the increase of K value, and the Fe⁃rich intermetallic in the alloy changes from needle⁃like Al3FeMn to Chinese⁃script Al6FeMn. In Al⁃5.0Cu⁃0.3Fe⁃1Si⁃xMn alloys, the mechanical properties of the alloy with K= 4 are the best, and the better plastic characteristics are also shown on the fracture surface of the alloy. Compared with K=3, the ultimate tensile strength and elongation of the alloy are increased by 22% and 65%, respectively. Si and Mn have a good modification effect on the Fe⁃rich intermetallic of Al⁃5.0Cu⁃0.3Fe alloy. Appropriate reduction of Mn addition in Al⁃5Cu alloy and further increase of Si content Maintain (Si+Mn) / Fe=4, is helpful to reduce the porosity of the alloy, better regulate the morphology of Fe⁃rich phase and reduce the thermal cracking sensitivity of the alloy. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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共 26 条
  • [1] Song D F, Zhou N, Xu J, Et al., Rare Metal Meterials and Engineering, 45, 8, (2016)
  • [2] Lin B, Zhang W W., Transactions of Materials and Heat Treatment, 37, 12, (2016)
  • [3] Liu K, Cao X, Chen X G., Metallurgical and Materials Transactions A, 42, 7, (2011)
  • [4] Zhang W W, Lin B, Luo Z, Et al., Journal of Materials Research, 30, 16, (2015)
  • [5] Liu K, Cao X, Chen X G., Metallurgical and Materials Transactions A, 43, 4, (2012)
  • [6] Xu R, Li H Y, Lin B, Et al., Foundry Technology, 39, 9, (2018)
  • [7] Bao Y, Zhao S M, Lv G Q, Et al., The Chinese Journal of Process Engineering, 19, 2, (2019)
  • [8] Xu L., International Journal of Cast Metals Research, 32, 2, (2019)
  • [9] Lin B, Zhang W W, Lou Z H, Et al., Materials and Design, 59, (2014)
  • [10] Kamga H K, Larouche D, Bournane M, Et al., Metallurgical and Materials Transactions A, 41, 11, (2010)
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