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Ti-6Al-4V microstructural functionally graded material by additive manufacturing: Experiment and computational modelling
Geng, Yaoyi1,2,6; Xie, Wenlong4,5; Tu, Yuhui1,2,6; Deng, Siying4; Egan, Darragh2,3; Dowling, Denis P.2,3; Song, Hongwu4; Zhang, Shihong4; Harrison, Noel1,2,6
Corresponding AuthorGeng, Yaoyi(y.geng1@nuigalway.ie)
2021-08-17
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume823Pages:9
AbstractIn this study, a functionally graded material (FGM) was fabricated using a powder bed fusion additive manufacturing technique. The FGM evaluated was Ti-6Al-4V, due to its importance in the medical device and aerospace sectors. The microstructure at selected build locations was analysed using both scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) techniques, where a gradient was observed both in terms of grain morphology and texture intensity. In addition, nanoindentation on the FGM sample shows a near quadratic shaped smooth gradient elastic modulus profile, with peak values at the midpoint of the gauge length. A tensile test to failure was conducted on the FGM sample with the aid of digital image correlation for surface strain analysis. Results show a gradient of local maximum principal strain in the highly {0001} textured section, while the reference sample in the control group shows a near-uniform strain distribution throughout the whole gauge length. A crystal plasticity finite element (CPFE) model was developed to explain the effect of texture on the mechanical properties adopting the microscopy-informed texture intensity gradient. Despite exhibiting higher elastic modulus (in the transverse direction, as measured via nanoindentation) the mid-section of the gauge length had a higher concentration of strain when loaded in the axial tensile direction, corresponding to build direction. The microscopy and computational modelling show that this apparent contradiction was explained via a high intensity of {0001} texture in the mid-section, leading to favourable conditions for axial strain accumulation.
KeywordFunctionally graded material Ti-6Al-4V Powder bed fusion Electron backscatter diffraction Crystal plasticity finite element model
Funding OrganizationCollege of Informatics and Engineering (CoEI) Postgraduate Scholarship, NUI Galway ; Science Foundation Ireland
DOI10.1016/j.msea.2021.141782
Indexed BySCI
Language英语
Funding ProjectCollege of Informatics and Engineering (CoEI) Postgraduate Scholarship, NUI Galway ; Science Foundation Ireland[16/RC/3872]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000682362000001
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159569
Collection中国科学院金属研究所
Corresponding AuthorGeng, Yaoyi
Affiliation1.Natl Univ Ireland Galway, Coll Sci & Engn, Mech Engn, Galway, Ireland
2.I Form Adv Mfg Res Ctr, Dublin, Ireland
3.Univ Coll Dublin, Sch Mech & Mat Engn, Dublin, Ireland
4.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
6.NUI Galway, Ryan Inst Environm Marine & Energy Res, Galway, Ireland
Recommended Citation
GB/T 7714
Geng, Yaoyi,Xie, Wenlong,Tu, Yuhui,et al. Ti-6Al-4V microstructural functionally graded material by additive manufacturing: Experiment and computational modelling[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,823:9.
APA Geng, Yaoyi.,Xie, Wenlong.,Tu, Yuhui.,Deng, Siying.,Egan, Darragh.,...&Harrison, Noel.(2021).Ti-6Al-4V microstructural functionally graded material by additive manufacturing: Experiment and computational modelling.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,823,9.
MLA Geng, Yaoyi,et al."Ti-6Al-4V microstructural functionally graded material by additive manufacturing: Experiment and computational modelling".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 823(2021):9.
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