کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1573234 1514678 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Local mechanical properties of the (β0+ω0) composite in multiphase titanium aluminides studied with nanoindentation at room and high temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Local mechanical properties of the (β0+ω0) composite in multiphase titanium aluminides studied with nanoindentation at room and high temperatures
چکیده انگلیسی
High temperature nanoindentation was conducted on a Ti‐44.5Al‐6.25Nb‐0.8Mo‐0.1B (in at.%) alloy from room temperature up to 600 °C to determine the temperature dependence of the local mechanical properties of the individual phases in a multiphase titanium aluminide alloy. The hardness of the (β0+ω0) composite is the highest among all phases and remains constant with increasing temperature, thus the (β0+ω0) composite does not decrease the strength of the alloy even at near service temperatures. A Burgers vector analysis in TEM of the deformed volume under the residual imprints after indentation at room temperature and 600 °C showed that the plastic deformation occurs mainly by <111>-type dislocations in the β0 phase. The high hardness of the (β0+ω0) composite can be attributed to a hardening effect of ω0 precipitates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 665, 17 May 2016, Pages 135-140
نویسندگان
, , , , , , , ,