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Publication Metadata only Composition and transitional temperature range of several nickel-titanium alloy wires in orthodontic treatment(2011-09-23) Rutchadakorn Isarapatanapong; Surachai Dechkunakorn; Niwat Anuwongnukroh; Nattiree Chiranavanit; Julathep Kajorchaiyakul; Anak Khantachawana; Mahidol University; Thailand National Metal and Materials Technology Center; King Mongkuts University of Technology Thonburi. The wires were tested in differential scanning calorimetry to find the transitional temperature range. Results: The compositions were nickel (50.085%-51.605%), titanium (46.675%-48.140%), copper (0.995%-1.155%), aluminum (0.220%-1.325%), chromium (0%-0Publication Metadata only Loading and unloading forces following addition of 5% Cu in nickel-titanium alloy used for orthodontics(2017-01-01) Aphinan Phukaoluan; Surachai Dechkunakorn; Niwat Anuwongnukroh; Anak Khantachawana; Pongpan Kaewtathip; Julathep Kajornchaiyakul; Wassana Wichai; King Mongkut s University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology Centerorthodontic archwire. Nickel (purity 99.9%), Titanium (purity 99.8%), and Copper (purity 99.9%) were used in this study with the atomic weight ratio 46.0 Ni: 49.0 Ti: 5.0 Cu. The elements were melted to form an alloy using an electrolytic arc furnace in argon... gas atmosphere and homogenized at 800°C for 1 hr. The alloys were subsequently sliced into thin plates (1.5mm) by EDM wire cutting machine to obtain the specimens and were cold-rolled with 30% reduction followed by heat treatment in a furnace at 400°CPublication Metadata only Effect of direct electric resistance heat treatment on loading/unloading behavior of nickel titanium orthodontic wire(2014-01-27) Surachai Dechkunakorn; Chavarit Sujaritviriyakul; Niwat Anuwongnukroh; Nathaphon Tangit; Mahidol UniversityObjective: The aim of this study was to investigate and compare the loading and unloading characteristics of various nickel-titanium (NiTi) and nickel-titanium-copper (NiTiCu) after direct electric resistance heat treatment method (Bender soarer-X... Sentalloy, Tomy L&H and Ormco NiTiCu had significantly different results (p<0.05) after heat treatments. The factors which could affect the loading and unloading characteristics were the difference in alloy composition and the condition of heat treatment