Precipitates and alloying elements distribution in near titanium alloy Ti65
查看参考文献54篇
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文摘
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Precipitates, including silicides and Ti_3Al (α_2) phase, and alloying elements distribution in a near α titanium alloy Ti65 (Ti-5.8Al-4.0Sn-3.5Zr-0.5Mo-0.3Nb- 1.0Ta-0.4Si-0.8W-0.05C) after solution treatment and aging process were characterized by using transmission electron microscopy (TEM) and atom probe tomography (APT). Quantitative composition analysis and TEM observation indicate that the silicides fit to (Ti, Zr)_6(Si, Sn)_3. Zr exhibits a β-stabilizing effect in near α titanium alloys but is weaker than other β stabilizing elements. The enriching tendency of the alloying elements in the retained β phase is in the order of Zr < Nb < Ta < Mo < W. The experimental results are rationalized by the relative stability of alloying elements in the α and β phases and the mobility of these atoms in the matrix. An enrichment of Si in the α_2 phase over the α matrix phase is noticed, which is attributed to the lower formation energy of Si in the α_2 phase. |
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来源
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Journal of Materials Science & Technology
,2020,36(1):91-96 【核心库】
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DOI
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10.1016/j.jmst.2019.03.018
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关键词
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Atom probe tomography
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Titanium alloys
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Precipitation
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First-principles calculation
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Alloying elements distribution
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地址
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1.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016
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School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026
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School of Materials Science and Engineering, Northeastern University, Shenyang, 110819
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School of Information Science and Engineering, Shenyang University of Technology, Shenyang, 110870
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1005-0302 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:6653080
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