کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8002509 1516314 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characteristics of the stress-induced formation of R-phase in ultrafine-grained NiTi shape memory wire
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Characteristics of the stress-induced formation of R-phase in ultrafine-grained NiTi shape memory wire
چکیده انگلیسی
The transformation between the cubic B2 and monoclinic B19′ phases in ultrafine-grained pseudoelastic NiTi can occur as a two-step process involving the intermediate rhombohedral R-phase. Experimental work using differential scanning calorimetry, electrical resistance measurements and transmission electron microscopy has demonstrated the formation of this intermediate phase during thermal cycling and during mechanical loading. In the present paper, complementary mechanical and thermographic results are presented which allow to further assess the character of the stress-induced R-phase formation. The transformation from B2 to R-phase is demonstrated to occur homogeneously within the gauge length rather than via advancing Lüders-type transition regions as it is the case in the localized transformation from B2 or R-phase to B19′.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 579, 5 December 2013, Pages 249-252
نویسندگان
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