TRANSFORMATION BEHAVIOR OF NiTi SHAPE MEMORY ALLOYS TREATED BY THERMOMECHANICAL PROCESSING USING DSC
عنوان مقاله: TRANSFORMATION BEHAVIOR OF NiTi SHAPE MEMORY ALLOYS TREATED BY THERMOMECHANICAL PROCESSING USING DSC
شناسه ملی مقاله: JR_IJMSEI-5-4_004
منتشر شده در در سال 1387
شناسه ملی مقاله: JR_IJMSEI-5-4_004
منتشر شده در در سال 1387
مشخصات نویسندگان مقاله:
H. Shahmir
M. Nili Ahmadabadi
F. Naghdi
خلاصه مقاله:
H. Shahmir
M. Nili Ahmadabadi
F. Naghdi
Abstract: In the present study the effect of thermomechanical treatment (cold work and annealing) on the
transformation behavior of NiTi shape memory alloys was studied. Differential scanning calorimetry was used to
determine transformation temperature and its relation to precipitates and defects. Three alloys including Ti-۵۰.۳at.%
Ni, Ti-۵۰.۵at.% Ni (reclamated orthodontic wires) and ۵۰.۶at.% Ni alloy were annealed at ۶۷۳ K and ۷۷۳ K for ۳۰
and ۶۰ min after ۱۵% cold rolling. It was found that the transformation characteristics of these alloys are sensitive to
annealing treatment and composition. The temperature range of transformation is broadened during cold working and
after subsequent annealing, the intermediate phase was appeared. The peaks become sharper and close together on
each cooling and heating cycle with increasing annealing temperature and time
کلمات کلیدی: NiTi; Shape memory alloy; Thermomechanical treatment; Cold working; Annealing; DSC.
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1723362/