کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1601344 1005194 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A re-examination of the pinning mechanisms responsible for the stress anomaly in FeAl intermetallics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
A re-examination of the pinning mechanisms responsible for the stress anomaly in FeAl intermetallics
چکیده انگلیسی
Fe-Al alloys, both those based on Fe3Al and those based on FeAl, show an anomalous increase in flow stress for temperatures in the range about 500-900 K. Some of the important characteristics of the experimental results collected over decades of study are reviewed, concentrating here on FeAl alloys with B2 order. Particular attention is given to the influence of vacancy concentration and the stress orientation when testing single crystal samples. Recent analyses deduce that the stress anomaly is caused by the high concentration of vacancies present at these temperatures. Re-analysis here of the hardening suggests that vacancies may annihilate at the dislocation cores and the new jogs may be suitable sites for subsequent dislocation decomposition into less mobile segments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 18, Issue 7, July 2010, Pages 1279-1284
نویسندگان
, ,