کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1556737 | 999208 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructures and Hardness Properties for β-Phase Ti-24Nb-4Zr-7.9Sn Alloy Fabricated by Electron Beam Melting
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 â¼100-200 nm. Although the corresponding selected area diffraction patterns can be indexed by β-phase plus αâ³-martensite with orthorhombic crystal structure, the dark-field analyses failed to observe the αâ³-martensite. Such phenomenon was also found in deformed gum metals and explained by stress-induced diffusion scattering due to phonon softening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 29, Issue 11, November 2013, Pages 1011-1017
Journal: Journal of Materials Science & Technology - Volume 29, Issue 11, November 2013, Pages 1011-1017
نویسندگان
J. Hernandez, S.J. Li, E. Martinez, L.E. Murr, X.M. Pan, K.N. Amato, X.Y. Cheng, F. Yang, C.A. Terrazas, S.M. Gaytan, Y.L. Hao, R. Yang, F. Medina, R.B. Wicker,