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+Ï0) composite in multiphase titanium aluminides studied with nanoindentation at room and high temperatures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
High temperature nanoindentation was conducted on a Tiâ44.5Alâ6.25Nbâ0.8Moâ0.1B (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+Ï0) composite is the highest among all phases and remains constant with increasing temperature, thus the (β0+Ï0) 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+Ï0) composite can be attributed to a hardening effect of Ï0 precipitates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 665, 17 May 2016, Pages 135-140
Journal: Materials Science and Engineering: A - Volume 665, 17 May 2016, Pages 135-140
نویسندگان
M. Kolb, J.M. Wheeler, H.N. Mathur, S. Neumeier, S. Korte-Kerzel, F. Pyczak, J. Michler, M. Göken,