کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620287 | 988605 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Incipient plasticity and dislocation nucleation of FeCoCrNiMn high-entropy alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Incipient plasticity and dislocation nucleation of FeCoCrNiMn high-entropy alloy Incipient plasticity and dislocation nucleation of FeCoCrNiMn high-entropy alloy](/preview/png/10620287.png)
چکیده انگلیسی
Instrumented nanoindentation was conducted on a FeCoCrMnNi high-entropy alloy with a single face-centered cubic structure to characterize the nature of incipient plasticity. Experiments were carried out over loading rates of 25-2500 μN sâ1 and at temperatures ranging from 22 to 150 °C. The maximum shear stress required to initiate plasticity was found to be within 1/15 to 1/10 of the shear modulus and relatively insensitive to grain orientation. However, it was strongly dependent upon the temperature, indicating a thermally activated process. Using a statistical model developed previously, both the activation volume and activation energy were evaluated and further compared with existing dislocation nucleation models. A mechanism consisting of a heterogeneous dislocation nucleation process with vacancy-like defects (â¼3 atoms) as the rate-limiting nuclei appeared to be dominant.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 61, Issue 8, May 2013, Pages 2993-3001
Journal: Acta Materialia - Volume 61, Issue 8, May 2013, Pages 2993-3001
نویسندگان
C. Zhu, Z.P. Lu, T.G. Nieh,