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Optimal stress and deformation partition in gradient materials for better strength and tensile ductility: A numerical investigation
Wang, Yao; Yang, Guangxue; Wang, Wenjing; Wang, Xi; Li, Qiang; Wei YJ(魏宇杰); Li, Q (reprint author), Beijing Jiaotong Univ, Minist Educ, Key Lab Vehicle Adv Mfg Measuring & Control Techn, Beijing 100044, Peoples R China.; Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.
Source PublicationSCIENTIFIC REPORTS
2017-09-08
Volume7
ISSN2045-2322
AbstractInspired by recent progress in developing gradient materials with excellent performances, here we report a systematic finite-element based investigation to show how the strength and tensile ductility of gradient crystalline metals depend on their microstructure characteristics. We reveal that the yielding strength of polycrystalline metals with gradient grain size can be significantly enhanced at no reduction in ductility. By employing a representative 3D voronoi gradient sample, we demonstrate that the redistribution of stress and deformation in the gradient structure - stronger grains carry more load and ductile ones share more deformation - accounts for the realized optimal property in strength and ductility. In addition, the hardenability of the ductile domain is beneficial to circumvent pre-mature plastic instability in gradient samples.
DOI10.1038/s41598-017-10941-7
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000409841100016
WOS KeywordGRAIN-SIZE GRADIENT ; VOID NUCLEATION ; PLASTICITY ; COPPER ; FRACTURE ; STEELS
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11425211) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22020200) ; Basic Scientific Research Foundation of Beijing Jiaotong University(M14JB00130)
DepartmentLNM微结构计算力学
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70048
Collection非线性力学国家重点实验室
Corresponding AuthorLi, Q (reprint author), Beijing Jiaotong Univ, Minist Educ, Key Lab Vehicle Adv Mfg Measuring & Control Techn, Beijing 100044, Peoples R China.; Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Yao,Yang, Guangxue,Wang, Wenjing,et al. Optimal stress and deformation partition in gradient materials for better strength and tensile ductility: A numerical investigation[J]. SCIENTIFIC REPORTS,2017,7.
APA Wang, Yao.,Yang, Guangxue.,Wang, Wenjing.,Wang, Xi.,Li, Qiang.,...&Wei, YJ .(2017).Optimal stress and deformation partition in gradient materials for better strength and tensile ductility: A numerical investigation.SCIENTIFIC REPORTS,7.
MLA Wang, Yao,et al."Optimal stress and deformation partition in gradient materials for better strength and tensile ductility: A numerical investigation".SCIENTIFIC REPORTS 7(2017).
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