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Mechanical properties and thermal stability of 7055 Al alloy by minor Sc addition
Liu, Chong-Yu1,2; Teng, Guang-Biao1; Ma, Zong-Yi2; Wei, Li-Li1; Zhou, Wen-Biao3; Huang, Hong-Feng1; Qi, Hai-Quan1
Corresponding AuthorMa, Zong-Yi(zyma@imr.ac.cn)
2020-06-01
Source PublicationRARE METALS
ISSN1001-0521
Volume39Issue:6Pages:725-732
AbstractThis study investigated the effect of 0.25 wt% Sc addition on the microstructure and mechanical properties of AA 7055 alloy. The addition of Sc obviously refined the grains of AA 7055 alloy during casting, homogenizing, rolling, solution, and aging treatments due to the formation of primary and precipitate Al-3(Sc,Zr) phase. The recrystallization and precipitation of AA 7055 alloy were inhibited during heat treatments by Sc addition. The Sc-containing AA 7055 alloy exhibited higher thermal stability than AA 7055 alloy during homogenizing treatment, because of the grain boundary pinning effect of nano-sized Al-3(Sc,Zr) particles. Given its structure characteristics such as fine grains, fine eta ' phase, and less eta phase, AA 7055 alloy with added Sc showed good mechanical properties after aging at 120 degrees C for 24 h, with an ultimate tensile strength (UTS) of 679 MPa and elongation (EL) of 14%. This work provides an effective strategy to fabricate Al-Zn-Mg(-Cu) series (7xxx) alloys with excellent mechanical properties.
KeywordAl alloy Sc addition Microstructure Mechanical properties
DOI10.1007/s12598-018-1190-z
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000538372800014
PublisherNONFERROUS METALS SOC CHINA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139364
Collection中国科学院金属研究所
Corresponding AuthorMa, Zong-Yi
Affiliation1.Guilin Univ Technol, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ, Guilin 541004, Peoples R China
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Alnan Aluminium Co Ltd, Nanning 530000, Peoples R China
Recommended Citation
GB/T 7714
Liu, Chong-Yu,Teng, Guang-Biao,Ma, Zong-Yi,et al. Mechanical properties and thermal stability of 7055 Al alloy by minor Sc addition[J]. RARE METALS,2020,39(6):725-732.
APA Liu, Chong-Yu.,Teng, Guang-Biao.,Ma, Zong-Yi.,Wei, Li-Li.,Zhou, Wen-Biao.,...&Qi, Hai-Quan.(2020).Mechanical properties and thermal stability of 7055 Al alloy by minor Sc addition.RARE METALS,39(6),725-732.
MLA Liu, Chong-Yu,et al."Mechanical properties and thermal stability of 7055 Al alloy by minor Sc addition".RARE METALS 39.6(2020):725-732.
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