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Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins
Yan, Changjian1,2; Xin, Yunchang1; Chen, Xiao-Bo3; Xu, Daokui4; Chu, Paul K.5; Liu, Chaoqiang6; Guan, Bo7; Huang, Xiaoxu7; Liu, Qing1
Corresponding AuthorXin, Yunchang(ycxin@cqu.edu.cn) ; Xu, Daokui()
2021-07-29
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume12Issue:1Pages:9
AbstractConventional ultrafine-grains can generate high strength in Mg alloys, but significant tradeoff of corrosion resistance due to inclusion of a large number of non-equilibrium grain boundaries. Herein, an ultrafine-grain structure consisting of dense ultrafine twins is prepared, yielding a high strength up to 469MPa and decreasing the corrosion rate by one order of magnitude. Generally, the formation of dense ultrafine twins in Mg alloys is rather difficult, but a carefully designed multi-directional compression treatment effectively stimulates twinning nucleation within twins and refines grain size down to 300nm after 12-passes compressions. Grain-refinement by low-energy twins not only circumvents the detrimental effects of non-equilibrium grain boundaries on corrosion resistance, but also alters both the morphology and distribution of precipitates. Consequently, micro-galvanic corrosion tendency decreases, and severe localized corrosion is suppressed completely. This technique has a high commercial viability as it can be readily implemented in industrial production. Conventional ultrafine grains can generate high-strength Mg alloys, but non-equilibrium grain boundaries deteriorates their corrosion resistance. Here, the authors present ultrafine grained Mg alloys with dense twins that display high strength and reduced corrosion rate by one order of magnitude.
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; Ministry of Education ; City University of Hong Kong Strategic Research Grant (SRG)
DOI10.1038/s41467-021-24939-3
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51871032] ; National Natural Science Foundation of China[52071039] ; Natural Science Foundation of Jiangsu Province[BK20202010] ; Ministry of Education[B16007] ; City University of Hong Kong Strategic Research Grant (SRG)[7005264]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000681059800010
PublisherNATURE PORTFOLIO
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159623
Collection中国科学院金属研究所
Corresponding AuthorXin, Yunchang; Xu, Daokui
Affiliation1.Nanjing Tech Univ, Key Lab Light Weight Mat, Nanjing, Peoples R China
2.Inst Corros Sci & Technol, Shenyang, Guangdong, Peoples R China
3.RMIT Univ, Sch Engn, Carlton, Vic, Australia
4.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang, Peoples R China
5.City Univ Hong Kong, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Hong Kong, Peoples R China
6.Cent South Univ, State Key Lab Powder Met, Changsha, Peoples R China
7.Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys, Chongqing, Peoples R China
Recommended Citation
GB/T 7714
Yan, Changjian,Xin, Yunchang,Chen, Xiao-Bo,et al. Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins[J]. NATURE COMMUNICATIONS,2021,12(1):9.
APA Yan, Changjian.,Xin, Yunchang.,Chen, Xiao-Bo.,Xu, Daokui.,Chu, Paul K..,...&Liu, Qing.(2021).Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins.NATURE COMMUNICATIONS,12(1),9.
MLA Yan, Changjian,et al."Evading strength-corrosion tradeoff in Mg alloys via dense ultrafine twins".NATURE COMMUNICATIONS 12.1(2021):9.
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