کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5016833 | 1465587 | 2016 | 49 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transformation stress modeling in new FeMnAlNi shape memory alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Transformation stress modeling in new FeMnAlNi shape memory alloy Transformation stress modeling in new FeMnAlNi shape memory alloy](/preview/png/5016833.png)
چکیده انگلیسی
We investigate the bcc-fcc transformation in the new shape memory alloy FeMnAlNi utilizing density functional theory calculations for double shear. We formulate an energy expression to derive the fcc martensite formation stress, incorporating the transformation shear energy and the elastic interactions of the dislocations. The critical bcc-fcc transformation stress was determined as 191Â MPa, which is close to the experiments. Concurrently, we also establish the fcc twinning and slip stresses as 201Â MPa and 335Â MPa respectively. The higher slip resistance ensures recoverability of the transformation. We observe that the Bogers-Burgers double shear mechanism proceeds with a much lower energy barrier and is favored over the 'classical' Bain deformation. Overall, the parameters obtained from DFT calculations are devoid of any empiricism and the prediction of these critical stresses permit the design of new iron based SMAs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 86, November 2016, Pages 93-111
Journal: International Journal of Plasticity - Volume 86, November 2016, Pages 93-111
نویسندگان
A. Ojha, H. Sehitoglu,