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Altered age-hardening behavior in the ultrafine-grained surface layer of Mg-Zn-Y-Ce-Zr alloy processed by sliding friction treatment
Liu, Chunquan1,2; Chen, Xianhua1,2,3; Yuan, Yuan1,2; Zhang, Wei4; Zhang, Yusheng4; Pan, Fusheng1,2
Corresponding AuthorChen, Xianhua(xhchen@cqu.edu.cn)
2021-07-10
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume78Pages:20-29
AbstractTo gain insight into the ageing behavior of ultrafine grain (UFG) structure, the precipitation phenomena and microstructural evolutions of Mg-6Zn-1Y-0.4Ce-0.5 Zr (wt.%) alloy processed by sliding friction treatment (SFT) were systematically studied using hardness texting, transmission electron microscopy (TEM) equipped with high-angle annular dark-field scanning (HADDF-STEM), X-ray diffraction (XRD) and XRD line broadening analysis. The microhardness of the SFT-processed (SFTed) sample initially decreases from 109.6 HV to 104.8 HV at ageing for 8 h, and then increases to the peak-ageing point of 115.4 HV at 16 h. Subsequently, it enters the over-aged period. The un-SFTed sample, as the counterpart, follows a regular ageing behavior that increases from 89.9 HV to 99.6 HV when ageing for 12 h, and then drops. A multi-mechanistic model is established to describe the strengthening due to grain refinement, dislocation accumulation, precipitation etc. The analysis reveals that the temperature sensitive UFG structure has an obvious grain coarsening effect, which arouses the soft phenomenon in the early ageing stage. But precipitation hardening provides an excellent hardness enhancement for overcoming the negative influence and helping to reach the peak-aged point. In our microstructural observations, a lot of equilibrium ultrafine MgZn2 precipitates precipitate along dislocations because defects can provide the favorable conditions for the migration and segregation of solute atoms. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordAgeing behavior Ultrafine-crystalline grain Nano precipitates Sliding friction treatment
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
DOI10.1016/j.jmst.2020.11.017
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFB0301100] ; National Natural Science Foundation of China[51571043] ; Fundamental Research Funds for the Central Universities[2020CDJDPT001] ; Fundamental Research Funds for the Central Universities[cqu2018CDHB1A08] ; Fundamental Research Funds for the Central Universities[2018CDGFCL0005]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000652023600002
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161476
Collection中国科学院金属研究所
Corresponding AuthorChen, Xianhua
Affiliation1.Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys MOE, Chongqing 400045, Peoples R China
2.Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400045, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China
Recommended Citation
GB/T 7714
Liu, Chunquan,Chen, Xianhua,Yuan, Yuan,et al. Altered age-hardening behavior in the ultrafine-grained surface layer of Mg-Zn-Y-Ce-Zr alloy processed by sliding friction treatment[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,78:20-29.
APA Liu, Chunquan,Chen, Xianhua,Yuan, Yuan,Zhang, Wei,Zhang, Yusheng,&Pan, Fusheng.(2021).Altered age-hardening behavior in the ultrafine-grained surface layer of Mg-Zn-Y-Ce-Zr alloy processed by sliding friction treatment.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,78,20-29.
MLA Liu, Chunquan,et al."Altered age-hardening behavior in the ultrafine-grained surface layer of Mg-Zn-Y-Ce-Zr alloy processed by sliding friction treatment".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 78(2021):20-29.
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