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Combination of dynamic transformation and dynamic recrystallization for realizing ultrafine-grained steels with superior mechanical properties
Zhao, Lijia1,2; Park, Nokeun1,3; Tian, Yanzhong1,4,5; Shibata, Akinobu1,4; Tsuji, Nobuhiro1,4
Corresponding AuthorZhao, Lijia(zhao@mines.edu) ; Tsuji, Nobuhiro(nobuhiro-tsuji@mtl.kyoto-u.ac.jp)
2016-12-14
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume6Pages:11
AbstractDynamic recrystallization (DRX) is an important grain refinement mechanism to fabricate steels with high strength and high ductility (toughness). The conventional DRX mechanism has reached the limitation of refining grains to several microns even though employing high-strain deformation. Here we show a DRX phenomenon occurring in the dynamically transformed (DT) ferrite, by which the required strain for the operation of DRX and the formation of ultrafine grains is significantly reduced. The DRX of DT ferrite shows an unconventional temperature dependence, which suggests an optimal condition for grain refinement. We further show that new strategies for ultra grain refinement can be evoked by combining DT and DRX mechanisms, based on which fully ultrafine microstructures having a mean grain size down to 0.35 microns can be obtained without high-strain deformation and exhibit superior mechanical properties. This study will open the door to achieving optimal grain refinement to nanoscale in a variety of steels requiring no high-strain deformation in practical industrial application.
Funding OrganizationElements Strategy Initiative for Structural Materials (ESISM) through the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; China Scholarship Council, China
DOI10.1038/srep39127
Indexed BySCI
Language英语
Funding ProjectElements Strategy Initiative for Structural Materials (ESISM) through the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan[15H05767] ; China Scholarship Council, China[2011608007]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000389810200001
PublisherNATURE PUBLISHING GROUP
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/123354
Collection中国科学院金属研究所
Corresponding AuthorZhao, Lijia; Tsuji, Nobuhiro
Affiliation1.Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan
2.Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA
3.Yeungnam Univ, Sch Mat Sci & Engn, Gyongsan 712749, South Korea
4.Kyoto Univ, Elements Strategy Initiat Struct Mat, Sakyo Ku, Kyoto 6068501, Japan
5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Lijia,Park, Nokeun,Tian, Yanzhong,et al. Combination of dynamic transformation and dynamic recrystallization for realizing ultrafine-grained steels with superior mechanical properties[J]. SCIENTIFIC REPORTS,2016,6:11.
APA Zhao, Lijia,Park, Nokeun,Tian, Yanzhong,Shibata, Akinobu,&Tsuji, Nobuhiro.(2016).Combination of dynamic transformation and dynamic recrystallization for realizing ultrafine-grained steels with superior mechanical properties.SCIENTIFIC REPORTS,6,11.
MLA Zhao, Lijia,et al."Combination of dynamic transformation and dynamic recrystallization for realizing ultrafine-grained steels with superior mechanical properties".SCIENTIFIC REPORTS 6(2016):11.
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