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Microstructures and Hardness Properties for b-Phase Tie24Nbe4Zre7.9Sn Alloy Fabricated by Electron Beam Melting
Alternative TitleMicrostructures and Hardness Properties for b-Phase Tie24Nbe4Zre7.9Sn Alloy Fabricated by Electron Beam Melting
Hernandez J1; Li S J2; Martinez E1; Murr L E1; Pan X M3; Amato K N1; Cheng X Y2; Yang F2; Terrazas C A4; Gaytan S M4; Hao Y L2; Yang R2; Medina F4; Wicker R B4
2013
Source PublicationJournal of Materials Science & Technology
ISSN1005-0302
Volume29Issue:11Pages:1011-1017
AbstractAtomized, pre-alloyed Ti–24Nb–4Zr–7.9Sn (wt%) powder was used to fabricate solid, prototype components by electron beam melting (EBM). Vickers microindentation hardness values were observed to average 2 GPa for the precursor powder and 2.5 GPa for the solid, EBM-fabricated products. The powder and solid product microstructures were examined by optical and electron microscopy. X-ray diffraction analyses showed that they had bcc β-phase microstructure. However, it was found by transmission electron microscopy that the EBM-fabricated product had plate morphology with space ~100–200 nm. Although the corresponding selected area diffraction patterns can be indexed by β-phase plus α″-martensite with orthorhombic crystal structure, the dark-field analyses failed to observe the α″-martensite. Such phenomenon was also found in deformed gum metals and explained by stress-induced diffusion scattering due to phonon softening.
Other AbstractAtomized, pre-alloyed Ti–24Nb–4Zr–7.9Sn (wt%) powder was used to fabricate solid, prototype components by electron beam melting (EBM). Vickers microindentation hardness values were observed to average 2 GPa for the precursor powder and 2.5 GPa for the solid, EBM-fabricated products. The powder and solid product microstructures were examined by optical and electron microscopy. X-ray diffraction analyses showed that they had bcc β-phase microstructure. However, it was found by transmission electron microscopy that the EBM-fabricated product had plate morphology with space ~100–200 nm. Although the corresponding selected area diffraction patterns can be indexed by β-phase plus α″-martensite with orthorhombic crystal structure, the dark-field analyses failed to observe the α″-martensite. Such phenomenon was also found in deformed gum metals and explained by stress-induced diffusion scattering due to phonon softening.
KeywordBiomedical titanium alloy α″-Martensite Electron beam melting Hardness Optical and electron microscopy
Indexed ByCSCD
Language英语
CSCD IDCSCD:4989362
Citation statistics
Cited Times:8[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/147549
Collection中国科学院金属研究所
Affiliation1.Department of Metallurgical and Materials Engineering, The University of Texas at El Paso,
2.中国科学院金属研究所
3.大连理工大学
4.W. M. Keck Center for 3D Innovation, The University of Texas at El Paso
Recommended Citation
GB/T 7714
Hernandez J,Li S J,Martinez E,et al. Microstructures and Hardness Properties for b-Phase Tie24Nbe4Zre7.9Sn Alloy Fabricated by Electron Beam Melting[J]. Journal of Materials Science & Technology,2013,29(11):1011-1017.
APA Hernandez J.,Li S J.,Martinez E.,Murr L E.,Pan X M.,...&Wicker R B.(2013).Microstructures and Hardness Properties for b-Phase Tie24Nbe4Zre7.9Sn Alloy Fabricated by Electron Beam Melting.Journal of Materials Science & Technology,29(11),1011-1017.
MLA Hernandez J,et al."Microstructures and Hardness Properties for b-Phase Tie24Nbe4Zre7.9Sn Alloy Fabricated by Electron Beam Melting".Journal of Materials Science & Technology 29.11(2013):1011-1017.
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