STRUCTURAL RELAXATIONAND PHASE TRANSFORMATION OF NANOSTRUCTERED/AMORPHOUS NiTi DURING SINTERING
Publish place: 1st International and 6th Joint Conference of Iranian Society of Metallurgical Engineers and the scientific community of Casting
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
IMES06_553
تاریخ نمایه سازی: 8 بهمن 1391
Abstract:
In this work the possibility of synthesis of amorphous phase in Ni-Ti binary system by mechanical alloying (MA) was investigated. Also, formation of B2-NiTiparent phase by crystallization of amorphous phase, and finally production of the nanostructured or fine grain parts during sintering stepwere examined.Phase transformation and amorphization were investigated by X-Ray diffraction, differential scanning calorimetry and scanning electron microscopy. Nanocrystaline B2- NiTi phase is formed in the early stage of the sintering due to crystallization of amorphous phase. However byincreasing of the sintering temperature, the amount of B2-NiTi was decreased and almost replaced by Ni3Ti and Ti2Ni. So the reasons of this phase transformation were investigated
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Authors
S.K. Sadrnezhaad
Professor ,Department of material science and engineering, sharif university of technology ,Tehran,Iran
Shahriyar Akbarinia
M.sc,Department of materials engineering, Islamic Azad university - karaj branch, karaj,iran
Ali Salemi Golozani
Assistance Professor, Department of materials engineering, Islamic Azad university - karaj branch, karaj,Iran
S. Alireza Hossini
PH.D student ,Material and energy research center, karaj –Iran
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