Fabrication and Mechanical Property Evaluation of Peripheral Stent Made from Shape Memory Alloys

Supasun Sakboriboon; Teerapat Yingchoncharoen; Chaowanun Pornwaragorn; Anak Khantachawana

doi:10.4028/p-124jgu

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HomeMaterials Science ForumMaterials Science Forum Vol. 1069Fabrication and Mechanical Property Evaluation of...

Fabrication and Mechanical Property Evaluation of Peripheral Stent Made from Shape Memory Alloys

Abstract:

This study proposes to design and fabricate the peripheral stent using NiTi shape memory alloy wires by braiding technique. The 0.2 mm diameter NiTi wire was attached to the automatic braiding machine and fabricated the braided stent under the different height of circular rod holder. Heat-treatment was carried out at 450°C, 500°C, 550°C and 600°C for 10 and 20 minutes, respectively. Then transformation temperature, the shape of cell area, and mechanical properties were evaluated. The results show that complete superelasticity can be confirmed under body temperature in stent prototypes with heat-treatment temperature over 500°C irrespective of heat-treatment time. The prototype with the height of circular mold of 70 mm shown a good braiding pattern with high kink resistance. The radial force shown no significant difference at any section along the length profile. It is noted that stent with the height of circular mold at 70 mm, carrier speed of 30 rad/sec and take-up speed of 4.86 mm/s which shown radial resistive force (ROF) of 2.44 ± 0.05 N/mm, and chronic outward force (COF) of 0.533 ± 0.03 N/mm which is sufficient for vessel expansion.

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Periodical:

Materials Science Forum (Volume 1069)

Pages:

49-54

DOI:

https://doi.org/10.4028/p-124jgu

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Online since:

August 2022

Authors:

Supasun Sakboriboon*, Teerapat Yingchoncharoen, Chaowanun Pornwaragorn, Anak Khantachawana

Keywords:

Chronic Kidney Disease, NiTi, Shape Memory Alloys, Stent, Superelasticity

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