کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448121 988665 2009 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Texture development and strain hysteresis in a NiTi shape-memory alloy during thermal cycling under load
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Texture development and strain hysteresis in a NiTi shape-memory alloy during thermal cycling under load
چکیده انگلیسی

Thermal cycling experiments were conducted on a NiTi shape-memory alloy at different constant applied stresses below the yield strength of the martensite. The mechanical strain response manifested as strain hysteresis loops, whose range was proportional to the applied stress. In situ neutron diffraction experiments show that the strain hysteresis occurs as a result of the establishment of a stress-dependent crystallographic texture of the martensite during the first cool-down from austenite, and thereafter repeated during thermal cycling under the same load. This texture is found to depend on the stress during the thermal cycling experiments. A strain-pole map is derived and shown to explain the observed texture during thermal cycling. The strain-pole methodology is shown to work with similar martensitic transformations in other material systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 8, May 2009, Pages 2403–2417
نویسندگان
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