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Highly ductile hypereutectic Al-Si alloys fabricated by selective laser melting
Yang, Yafeng1,2; Geng, Kang1,2; Li, Shaofu1,2; Bermingham, Michael3; Misra, R. D. K.4
2022-05-30
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume110Pages:84-95
AbstractIn the endeavor to maximize the refinement effect of primary Si and alleviate the inherent brittleness of hypereutectic Al-Si alloy, the approach of coating P as a modifier on powder was adopted. The ulti-mate aim was to create more heterogeneous fine AlP nucleus and enhance the nucleation efficiency of primary Si on AlP to refine the coarse primary Si to nano-scale during 3D printing. In the combination of large undercooling and high density of nucleation sites, the size of primary Si was successfully refined to 20 0-30 0 nm and the divorced eutectic was also induced to modify the microstructure of matrix. In the presence of nano-scale primary Si, the melting pool boundary (MPB) feature disappeared and the fracture mechanism also changed from load transfer to interfacial fracture. Compared with the pristine alloy, the ductility was increased four times without significantly changing the ultimate tensile strength (UTS) and wear resistance. The improvement of ductility is attributed to the refinement of primary Si, the disappearance of MPB features and the formation of divorced eutectic. The optimal tensile properties were: UTS-482 MPa, yield strength-320 MPa and ductility of 8.1% at 0.05 wt.% P. These are comparable to those for high-strength Al alloys. (c) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals.
KeywordAl -Si alloys Heterogeneous nucleation Ductility Powder processing Selective laser melting
DOI10.1016/j.jmst.2021.07.050
Language英语
WOS KeywordMECHANICAL-PROPERTIES ; HEAT-TREATMENT ; TENSILE PROPERTIES ; GRAIN-REFINEMENT ; MELTED ALSI10MG ; AL-50SI ALLOY ; MICROSTRUCTURE ; ALUMINUM ; EVOLUTION ; PARTICLES
Funding ProjectNational Key Research and Development Program of China[2018YFB1105100] ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[YJKYYQ20190011]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key Research and Development Program of China ; Scientific Instrument Developing Project of the Chinese Academy of Sciences
WOS IDWOS:000788148800001
PublisherJOURNAL MATER SCI TECHNOL
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/52888
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Yafeng
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Queensland, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia
4.Univ Texas El Paso, Dept Met Mat & Biomed Engn, 500 W Univ Ave, El Paso, TX 79968 USA
Recommended Citation
GB/T 7714
Yang, Yafeng,Geng, Kang,Li, Shaofu,et al. Highly ductile hypereutectic Al-Si alloys fabricated by selective laser melting[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,110:84-95.
APA Yang, Yafeng,Geng, Kang,Li, Shaofu,Bermingham, Michael,&Misra, R. D. K..(2022).Highly ductile hypereutectic Al-Si alloys fabricated by selective laser melting.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,110,84-95.
MLA Yang, Yafeng,et al."Highly ductile hypereutectic Al-Si alloys fabricated by selective laser melting".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 110(2022):84-95.
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