Compressive behavior of high-porosity NiTi
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_320
تاریخ نمایه سازی: 8 بهمن 1391
Abstract:
Porous NiTi shape memory alloys have shown good potentials for different functional to structural applications as well as biomedical applications. In the present study, highly porous shape memory NiTi alloy specimens were produced via space holder method using urea as a temporary material. The porous NiTi specimens exhibit good pore characteristics and interconnectivity that is appropriate for biomedical applications. Compressive mechanical tests were performed for NiTi specimens with porosity ranged from 42 to 70 percent. It is obvious that the mechanical properties such as Young’s modulus, strength stress of the porous NiTi decrease with increasing porosity. Also, apparent Young’s modulus of NiTi specimens decreases from 5.3 to 3 GPa as porosity increases. Maximum recoverable strain of near to 8.5% and 7 was achieved for porous NiTi specimens without urea and 50 vol.% urea, respectively. Furthermore, recoverable strain percent is almost constant for superelastic porous NiTi after several cycles
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Authors
S.A Hosseini
Materials and Energy Research Center, P.O. Box ۱۴۱۵۵-۴۷۷۷, Karaj, Iran
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