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Microstructures and Hardness Properties for b-Phase Tie24Nbe4Zre7.9Sn Alloy Fabricated by Electron Beam Melting

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Hernandez J 1   Li S J 2   Martinez E 1   Murr L E 1 *   Pan X M 3   Amato K N 1   Cheng X Y 2   Yang F 2   Terrazas C A 4   Gaytan S M 4   Hao Y L 2   Yang R 2   Medina F 4   Wicker R B 4  
文摘 Atomized, 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.
来源 Journal of Materials Science & Technology ,2013,29(11):1011-1017 【核心库】
DOI 10.1016/j.jmst.2013.08.023
关键词 Biomedical titanium alloy ; α″-Martensite ; Electron beam melting ; Hardness ; Optical and electron microscopy
地址

1. Department of Metallurgical and Materials Engineering, The University of Texas at El Paso,, USA, El Paso, 79968  

2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang, 110016  

3. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024  

4. W. M. Keck Center for 3D Innovation, The University of Texas at El Paso, USA, El Paso, 79968

语种 英文
文献类型 研究性论文
ISSN 1005-0302
学科 金属学与金属工艺
基金 Murchison Endowed Chairs at UTEP, and an MOST Grant
文献收藏号 CSCD:4989362

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引证文献 12 篇

1 Liu Yujing Electron Beam Melted Beta-type Ti–24Nb–4Zr–8Sn Porous Structures With High Strength-to-Modulus Ratio Journal of Materials Science & Technology,2016,32(6):505-508
CSCD被引 20 次

2 Hao Yulin Biomedical titanium alloys and their additive manufacturing Rare Metals,2016,35(9):661-671
CSCD被引 23 次

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