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Effect of yttrium addition on microstructures, damping properties and mechanical properties of as-cast Mg-based ternary alloys
Niu, Rui-long1,2; Yan, Fang-jia1,2; Duan, Dong-ping1,2; Yang, Xue-min1,2
2019-05-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume785Pages:1270-1278
AbstractIn order to reveal the functions of yttrium addition on damping and mechanical properties for Mg-based alloys, the damping and mechanical properties of prepared as-cast Mg-0.6Zr-xY ternary alloys with [Y] = 1.0, 2.0, 3.0, 4.0 and 5.0 mass % have been experimentally measured and theoretically explained through combining the observed microstructures with related theoretical models or mechanisms. The experimental results indicate that added [Y] in the ternary alloys has clear effect on grain refinement. Changing [Y] from 1.0 to 5.0 mass % can effectively decrease the average size of formed equiaxed alpha-Mg grains from 70.15 to 33.62 mu m. The bulk-shaped yttrium-rich phase in alpha-Mg matrix is mainly composed of Mg24Y5 phase. Increasing [Y] from 1.0 to 5.0 mass % can significantly affect damping properties described by tan phi under the condition of epsilon> epsilon(cr) = 2.0 x 10(-2) , while no visible effect of increasing [Y] on tan phi at epsilon < epsilon(cr) = 2.0 x 10(-2) can be obtained. Furthermore, the influence of changing strain epsilon from 1.0 x 10(-4) to 1.0 x 10(-1) on tan phi complies with dislocation pinning theory or the G-L model. Meanwhile, increasing [Y] in the ternary alloys shows the similar variation tendency for relationship between tan phi and temperature T from ambient temperature T-am to 673 K (400 degrees C). The effect of varying temperature T from T-am to 673 K (400 degrees C) on tan phi for the ternary alloys can be well explained by the grain boundary damping mechanism. In addition, increasing [Y] from 1.0 to 4.0 mass % can effectively promote both yield strength R-p0.2 and ultimate tensile strength R-m, however further increasing [Y] from 4.0 to 5.0 mass % cannot result in an obviously increasing tendency for R-p0.(2) and R-m. The similar results of adding [Y] on elongation A can also be obtained with [Y] = 3.0% as a criterion. Meanwhile, the measured results of adding [Y] on Rp(0.2) and R-m for the ternary alloys can be well explained by the grain boundary strengthening and solid solution strengthening mechanisms. Therefore, the optimal chemical composition for as-cast Mg-Zr-Y ternary alloys with higher damping properties and greater tensile properties is recommended to be Mg-0.6Zr-4.0Y. (C) 2019 Elsevier B.V. All rights reserved.
KeywordEffect of yttrium Damping properties Mechanical properties Damping mechanism As-cast Mg-Zr-Y ternary alloys Microstructures
DOI10.1016/j.jallcom.2019.01.287
Language英语
WOS KeywordBEHAVIOR ; DEFORMATION ; DISLOCATION ; PHASES ; ND ; RE
Funding ProjectBeijing Natural Science Foundation[2182069] ; National Natural Science Foundation of China[51174186]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationBeijing Natural Science Foundation ; National Natural Science Foundation of China
WOS IDWOS:000460386900151
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28201
Collection中国科学院过程工程研究所
Corresponding AuthorDuan, Dong-ping; Yang, Xue-min
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Niu, Rui-long,Yan, Fang-jia,Duan, Dong-ping,et al. Effect of yttrium addition on microstructures, damping properties and mechanical properties of as-cast Mg-based ternary alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,785:1270-1278.
APA Niu, Rui-long,Yan, Fang-jia,Duan, Dong-ping,&Yang, Xue-min.(2019).Effect of yttrium addition on microstructures, damping properties and mechanical properties of as-cast Mg-based ternary alloys.JOURNAL OF ALLOYS AND COMPOUNDS,785,1270-1278.
MLA Niu, Rui-long,et al."Effect of yttrium addition on microstructures, damping properties and mechanical properties of as-cast Mg-based ternary alloys".JOURNAL OF ALLOYS AND COMPOUNDS 785(2019):1270-1278.
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