کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10136014 | 1645675 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature dynamic response of SPS-processed Ni3Al
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
To clarify mechanisms governing plastic deformation in SPS-processed Ni3Al, the temperature-dependence of its yield strength was determined at temperatures up to 1200â¯K. Based on these measurements, the evolution of elastic-plastic waves with propagation distance in samples of Ni3Al was studied at room temperature and at 923â¯K, the temperature at which maximum yield strength is seen. The differences between temperature dependencies of yield strength measured under dynamic and static conditions can be explained as being the result of competition between primary (octahedral planes) and secondary (cubic planes) dislocation glide systems. It can be argued that the former thermally hardens the intermetallic, whereas the latter is responsible for its thermal softening. Since the secondary glide system prevails at high temperature, the stress Ïââ
0.55GPa, corresponding to the change in regime of decay of the elastic wave at 923â¯K, seems to be equal the Peierls stress of dislocation of ã110ã{100} glide systems at this temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 102, November 2018, Pages 26-33
Journal: Intermetallics - Volume 102, November 2018, Pages 26-33
نویسندگان
N. Frage, S. Kalabukhov, A. Wagner, E.B. Zaretsky,