کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1578307 1001203 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of tension–compression asymmetry of magnesium by use of the acoustic emission technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Investigation of tension–compression asymmetry of magnesium by use of the acoustic emission technique
چکیده انگلیسی

The acoustic emission (AE) technique has been applied to in situ investigations of deformation processes of polycrystalline magnesium with various grain sizes in tension and compression from 20 to 300 °C. The AE signal of twin nucleation exhibited an asymmetry corresponding to the tension–compression flow stress asymmetry due to easier {1 0 1¯ 2} twinning in compression. A maximum in the AE signal is observed at 200 °C and is interpreted as a consequence of the synergetic effect of twinning and greater slip activity at higher temperatures. A larger grain size (600 μm) facilitated twinning.


► Significant tension–compression asymmetry remarkable also on acoustic emission response.
► Maximum of twinning activity at 200 °C.
► At 300 °C strong decrease of intensity of AE signal due to non-basal slip activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 528, Issue 18, 15 July 2011, Pages 5904–5907
نویسندگان
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