کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9795590 | 1514931 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
TEM characterization of the precipitation reaction in Ti-48Al-10Nb alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: TEM characterization of the precipitation reaction in Ti-48Al-10Nb alloy TEM characterization of the precipitation reaction in Ti-48Al-10Nb alloy](/preview/png/9795590.png)
چکیده انگلیسی
A detailed transmission electron microscopy (TEM) study has been made of the morphology and the crystallographic characteristics of precipitation of the γ1-Ti4Nb3Al9 in the γ-TiAl matrix in Ti-Al-Nb system. It is revealed that the γ1-Ti4Nb3Al9 precipitates, which are formed by a normal quench at 1473 K and ageing treatment at 1073 K, take needle-like morphology with a growing axis parallel to [0 0 1] direction of the matrix. The needle-like precipitates act as barrier grid to inhibit dislocation moving on the slipping plane {1 1 1} of the γ-TiAl matrix, which helps to improve the strength of the alloy. Selected electron microscopy analysis shows that the orientation relationship between the γ1 phase and the γ-TiAl matrix is [0 0 1]γ1//[0 0 1]γ, (1 0 0)γ1//(1 1 0)γ and (010)γ1//(1¯10)γ. The needle-like morphology of the precipitated phase is discussed with the coherency stress across the precipitate/matrix interface that is considered to be the main factor controlling the precipitate morphology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 412, Issues 1â2, 5 December 2005, Pages 328-335
Journal: Materials Science and Engineering: A - Volume 412, Issues 1â2, 5 December 2005, Pages 328-335
نویسندگان
H.W. Liu, Y. Yuan, Z.G. Liu, J.-M. Liu, X.N. Zhao, Y.Y. Zhu,