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Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy
Liu, H. Q.1; Pang, J. C.1,2; Wang, M.1; Li, S. X.1; Zhang, Z. F.1,2
Corresponding AuthorPang, J. C.(jcpang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
2021-09-08
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume824Pages:10
AbstractHigh-temperature performance is a key factor to concern for the application of cast Al-Si alloys. The evolution of microstructures and mechanical properties of a multiphase Al-Si-Cu-Mg-Ni-Ce alloy during tension in a temperature range from 25 degrees C (ambient temperature) to 425 degrees C was investigated. The results show that the main strengthening precipitates of the alloy are theta' and Q phases. They are stable at 25-250 degrees C, while dissolve rapidly above 250 degrees C during tension. The damage initiates and propagates in the form of cracking of brittle phases. The fracture mechanism transforms from quasi-cleavage to coexistence of quasi-cleavage and dimple as temperature increases. The Ce-bearing phase Al20Ti2Ce promotes the damage occurrence below 350 degrees C while hinders crack propagation at 425 degrees C. The ultimate tensile strength (UTS) and yield strength (YS) decrease as the tensile temperature increases. The decreasing rate of UTS can be divided into three stages which is associated with the decreasing rate of strengthening precipitates. An empirical constitutive equation is proposed to describe the relationship between UTS and tensile temperature. It provides a good estimation for both cast and wrought Al alloys and the predicted strengths are in good agreement with the experimental results.
KeywordCast Al-Si alloy High-temperature tension Strengthening precipitate Constitutive equation
Funding OrganizationNational Nat-ural Science Foundation of China (NSFC) ; Liao Ning Revitalization Talents Program
DOI10.1016/j.msea.2021.141762
Indexed BySCI
Language英语
Funding ProjectNational Nat-ural Science Foundation of China (NSFC)[51871224] ; Liao Ning Revitalization Talents Program[XLYC1808027]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000689227900002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166868
Collection中国科学院金属研究所
Corresponding AuthorPang, J. C.; Zhang, Z. F.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Liu, H. Q.,Pang, J. C.,Wang, M.,et al. Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,824:10.
APA Liu, H. Q.,Pang, J. C.,Wang, M.,Li, S. X.,&Zhang, Z. F..(2021).Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,824,10.
MLA Liu, H. Q.,et al."Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 824(2021):10.
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