کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1580051 1645418 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anelasticity in a Cu-Al single crystal at elevated temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Anelasticity in a Cu-Al single crystal at elevated temperatures
چکیده انگلیسی
A Cu-Al single crystal with 7 at.% Al has been studied using isothermal mechanical spectroscopy (IMS) technique. After a 1% cold work by torsion, the samples have been progressively heated to 1140 K and then cooled down to room temperature. IMS experiments allow to compare the isothermal internal friction spectra obtained during heating (in this case, the annealing temperature is equal to the temperature of measurement) with the measurements performed at various temperatures during cooling after annealing at 1140 K. This paper is focused on two relaxation peaks observed in the temperature range 750-1140 K. The first one, called here P1 (at about 0.6 TM at 1 Hz), decreased with increasing the annealing temperature, while a new relaxation peak P2 (at about 0.8 TM at 1 Hz) progressively developed. Because the internal friction spectra are complex (one or two peaks superimposed to background), a particular technique for background subtraction was used. The evolution of the peaks with temperature was monitored and their relaxation parameters accurately determined. P1 and P2 peaks have been assigned to the motion of dislocation segments inside the sample microstructure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 521–522, 15 September 2009, Pages 98-101
نویسندگان
, , ,