کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803872 | 1516474 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic mechanical properties in a Zr46.8Ti13.8Cu12.5Ni10Be27.5 bulk metallic glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dynamic mechanical properties in a Zr46.8Ti13.8Cu12.5Ni10Be27.5 bulk metallic glass Dynamic mechanical properties in a Zr46.8Ti13.8Cu12.5Ni10Be27.5 bulk metallic glass](/preview/png/9803872.png)
چکیده انگلیسی
The dynamic mechanical response was investigated in a bulk metallic glass Zr46.8Ti13.8Cu12.5Ni10Be27.5 (called Vit4). Mechanical spectroscopy was performed either using continuous heating or isothermal measurements. A main visco-elastic relaxation is observed before the onset of crystallization. A drastic decrease of the storage modulus and a maximum of the loss modulus indicate this relaxation in the amorphous state. The very large activation energy (EAÂ =Â 4.5Â eV) and the very high value of the pre-exponential factor (Ï0â1Â =Â 2.5Â ÃÂ 10â35Â s) indicate that this relaxation involves the collective movement of a large number of atoms, as in many amorphous materials (polymers, oxide or molecular glasses). Master curves are plotted, indicating that the time-temperature superposition principle is obeyed. These master curves can be described using a physical model based on the concept of quasi-point defects. Finally, the elastic, visco-elastic and visco-plastic contributions to the deformation are separated and discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 393, Issues 1â2, 3 May 2005, Pages 223-230
Journal: Journal of Alloys and Compounds - Volume 393, Issues 1â2, 3 May 2005, Pages 223-230
نویسندگان
J.M. Pelletier,