کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1613840 1005601 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isothermal α″ formation in β metastable titanium alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Isothermal α″ formation in β metastable titanium alloys
چکیده انگلیسی

Thanks to time resolved high energy X-ray diffraction, isothermal decomposition of β metastable phase was studied, directly after solution treatment in the β temperature range, for temperatures ranging from 300 to 450 °C for two beta metastable alloys (Ti 17 and Ti 5553). The formation of an orthorhombic α″ phase is clearly identified at the beginning of the transformation whatever the alloy studied. If transformation occurs at the higher temperature an evolution of α″ is observed toward the hexagonal α phase. The phase amounts and the mean cell parameters of each phase were quantified by the Rietveld refinement method. The obtained cell parameters evolutions and the orthorhombicity of α″ are discussed. Moreover, the orthorhombicity of α″ compared to that obtained for stress induced martensite may indicate a slight partitioning of solutes in isothermal α″.


► Isothermal kinetics of orthorhombic α″ formation is characterized by HEXRD.
► Cell parameters of parent and product phases are obtained.
► Partitioning of solutes during the transformation and the ageing is discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 577, Supplement 1, 15 November 2013, Pages S439–S443
نویسندگان
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