کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1580008 1514838 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural and micromechanical characterisation of TiAl alloys using atomic force microscopy and nanoindentation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructural and micromechanical characterisation of TiAl alloys using atomic force microscopy and nanoindentation
چکیده انگلیسی
Different microstructures were generated in the Ti-45Al-4.6Nb-0.2B-0.2C and Ti-45Al-1Cr alloys (at.%) by heat treatment. The microstructures were investigated using nanoindentation and atomic force microscopy which was compared with transmission electron microscopy. Topographic contrast is usually used for phase identification in the atomic force microscope. However, it was found that the topographic order of the phases changes with different microstructures and specimen preparations. Nanoindentation measurements provided local hardness values not obtainable by other methods and enabled clear distinction of the phases. The hardness values can give information on surrounding microstructure and solid solution hardening. The mean lamellar spacing of the colonies was measured using both atomic force microscopy and transmission electron microscopy. Atomic force microscopy was found to be suitable to determine the spacing between α2/γ-interfaces offering the advantages of easier sample preparation and fewer specimens compared to evaluation by TEM analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 523, Issues 1–2, 15 October 2009, Pages 235-241
نویسندگان
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