Effect of direct electric resistance heat treatment on mechanical properties of NiTi orthodontic arch wires

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Kiattiwongse W., Khantachawana A., Santiwong P.

ผู้เผยแพร่: Trans Tech Publications

ปีที่เผยแพร่ (ค.ศ.): 2008

Volume number: 55-57

หน้าแรก: 249

หน้าสุดท้าย: 252

จำนวนหน้า: 4

ISBN: 9780878493562

นอก: 1022-6680

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-62949105513&partnerID=40&md5=fb7567be5973c78f89564af262b258fa

ภาษา: English-Great Britain (EN-GB)

บทคัดย่อ

Two types of rectangular orthodontic archwires; NiTi™ and 40°CuNiTi, were heat treated by Direct Electric Resistance Heat Treatment (DERHT) using different electric currents for 4 s. Their mechanical properties were then evaluated by micro hardness and three-point bending tests. After applying 4.5-5.5 A current, the hardness of NiTi™ increased with the increased current, whereas the change in hardness of 40°CuNiTi was slight. When 6 A current was applied, the hardness of the midspan of both wires significantly decreased. From the three-point bending test, unloading forces of NiTi™ increased after treating with 5.5 A current, while those of 40°CuNiTi decreased. However, both specimens lost their superelasticity when applied with 6 A current. In conclusion, after DERHT, various changes in mechanical properties can be noted in the different types of nickel titanium archwire. © 2008 Trans Tech Publications, Switzerland.

คำสำคัญ

Nickel titanium alloy, Orthodontic archwire, Surface hardness