کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7881613 | 1509602 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystallographic insights into the intermartensitic transformation in Ni-Mn-Ga alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Ferromagnetic shape memory alloys such as Ni-Mn-Ga usually undergo intermartensitic transformation upon cooling or heating. Here, an attempt is made to explore the microstructural features and orientation relationships associated with the intermartensitic transformation from seven-layered modulated (7M) martensite to non-modulated (NM) martensite in a polycrystalline Ni53Mn22Ga25 alloy. Based on electron backscatter diffraction analysis, it is demonstrated that the intermartensitic transformation proceeds in an in-plate manner (through atomic reshuffling and lattice distortion) with specific orientation relationships between the two martensitic phases, i.e. (0 0 1)7M//(1 1 2)NM and [1 0 0]7M//[1 1 1¯]NM as well as (0 0 1)7M//(1 1 2)NM and [1¯ 0 0]7M//[1 1 1¯]NM, accompanied by the thickening of martensite plates and the surface relief effect. Consequently, one 7M variant (plate) evolves into one NM plate consisting of two twin-related fine variants, and four differently oriented 7M variants in one variant group result in a total of eight NM variants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 74, 1 August 2014, Pages 9-17
Journal: Acta Materialia - Volume 74, 1 August 2014, Pages 9-17
نویسندگان
Zongbin Li, Bo Yang, Yudong Zhang, Claude Esling, Naifu Zou, Xiang Zhao, Liang Zuo,