کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1576249 | 1514772 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Plastic deformation mechanisms in a crept L12 hardened Co-base superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Plastic deformation mechanisms in a crept L12 hardened Co-base superalloy are investigated by transmission electron microscopy. The deformation happens mainly in the cobalt solid solution matrix by slip of ordinary a/2ã101ã{111} dislocations and rafting of the γⲠprecipitates perpendicular to the external compressive stress axis is observed. Dislocation structures are early stages of the development of γ/γⲠinterfacial dislocation networks. Furthermore, γⲠprecipitates are sheared by partial dislocations generating stacking faults which sometimes extend over matrix channels and neighbouring γⲠprecipitates. Due to the positive lattice mismatch at creep temperature the dislocation activity in matrix channels perpendicular to the compressive external stress axis is less pronounced compared to parallel channels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 571, 1 June 2013, Pages 13-18
Journal: Materials Science and Engineering: A - Volume 571, 1 June 2013, Pages 13-18
نویسندگان
F. Pyczak, A. Bauer, M. Göken, S. Neumeier, U. Lorenz, M. Oehring, N. Schell, A. Schreyer, A. Stark, F. Symanzik,