کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450862 988749 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of Ni50+xMn25Ga25−x (x = 2–11) as high-temperature shape-memory alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Study of Ni50+xMn25Ga25−x (x = 2–11) as high-temperature shape-memory alloys
چکیده انگلیسی

Ni50+xMn25Ga25−x (x = 2–11) alloys were studied as high-temperature shape-memory alloys, with regard to their microstructure, martensitic transformation behavior and high-temperature shape-memory effect. Single phase of martensite with tetragonal structure was present for x < 7, and dual phases containing martensite and γ were observed for x ⩾ 7. The martensitic transformation peak temperatures Mp increase monotonically from 39.1 °C for x = 2 to 443.8 °C for x = 7, then remain almost constant at 440 °C for x ⩾ 7. The shape-memory strains of the alloys decreased gradually from 6.1% for x = 4 to 2.8% for x = 8 and 0% for x = 11 under the same pre-strain. The variations of the martensitic transformation temperatures and the shape-memory effects with Ni contents correlate with changes in size factor, electron concentration and precipitation of γ phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 5, March 2007, Pages 1533–1541
نویسندگان
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