کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10655709 1005234 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physical metallurgy for wrought gamma titanium aluminides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Physical metallurgy for wrought gamma titanium aluminides
چکیده انگلیسی
This paper characterizes the phase equilibria among β/α(α2)/γ phases and phase transformations involving β-Ti phase in Ti-Al-M (M is β stabilizer against α phase in pure Ti) ternary systems at elevated temperatures. Based on the knowledge, a novel method has been proposed to develop a new class of wrought gamma alloys having a good hot workability for processing and good toughness in service at around 900 K. The ternary systems exhibit the β+α(α2)+γ three-phase tie triangle moving toward the Ti-Al binary edge with decreasing temperature, which results in a unique composition range with the transformation pathway of β+α→α→β+γ. The high-temperature β phase is effective for hot forming processes, whereas the decomposition (β+α→α) and precipitation (α→β+γ) of the β phase make it possible to produce a fully lamellar microstructure with very fine β particles dispersed within the lamellae.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 13, Issue 9, September 2005, Pages 993-999
نویسندگان
, ,