2013-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/703087摘要：鈦鎳基形狀記憶合金因擁有形狀記憶效應(SME)，超彈性(PE)及制振能(DC)等性能而被視為是機能材料之一，並廣泛應用於工程及醫學領域。由於工業產品一直往輕薄短小的方向走，這些小型化產品對SMAs性能之要求將更為嚴苛，也因而TiNi基SMAs性能最佳化的研究變為重要。申請人依過去20多年來研究TiNi基SMAs之經驗，擬由合金設計、製程控制、固溶/析出硬化、性能測試等方法，利用三年時間來研究TiNi基SMAs性能的最佳化，並由SMAs降伏強度之提升來尋求其SME/PE性能之最佳化。第一年度擬研究富鎳二元TiNi SMAs性能之最佳化，由Ti49.3Ni50.7及Ti49Ni51之固溶與時效產生Ti3Ni4的析出硬化，探討最佳之析出硬化熱處理條件及其與SME/PE最佳化之關係。第二年度擬研究富鈦TiNi SMAs性能之最佳化，由Ti51Ni49及Ti52Ni48經快速凝固製程做成箔片，探討箔片經200~600°C退火後其奈米G. P. zone/碟狀Ti2Ni之析出硬化現象，並尋找出最佳之退火條件及其與SME/PE最佳化之關係。第三年度擬研究三元TiNiCu SMAs性能之最佳化，由富鎳的Ti49Ni41Cu10及富鈦的Ti51Ni39Cu10依第1及第2年度之研究方法及步驟，探討其主要之析出相及析出硬化之現象，同時也尋求最佳之析出硬化/退火條件及其與SME/PE最佳化之關係。上述之研究成果將與本整合型計畫之其他子計畫作交叉比較，並透過總計劃做橫向整理，以使SMAs之性能最佳化能更臻完善。<br> Abstract: TiNi-based shape memory alloys (SMAs) exhibit the uncommon properties of shape memory effect (SME), superelasticity (PE) and have high potential for applying to engineering/medical fields. The trend of industrial products, especially for 3C products, is toward the miniaturization. The SMAs used in miniature products demand good properties performance, and therefore, the properties optimization of TiNi-based SMAs becomes an important issue at present. The purpose of this 3-year subproject is aimed to study the properties optimization of TiNi-based SMAs in accordance with our past studies on TiNi-based SMAs and the methods of alloys design, process control, solution/precipitation hardening, etc. The precipitation hardening exhibited in SMAs can improve significantly SMAs’ SME/PE properties. In the first year, properties optimization of Ni-rich TiNi SMAs will be studied by using Ti49.3Ni50.7 and Ti49Ni51 SMAs through the aging control to get the optimal Ti3Ni4 precipitation hardening condition and to look for its relationship with the SME/PE properties. In the second year, properties optimization of Ti-rich TiNi-based SMAs will be investigated by using Ti51Ni49 and Ti52Ni48 SMAs through the rapid solidification process to obtain the ribbons. The ribbons will be annealed at 200~600°C to look for the optimal G. P. zone/disc-like Ti2Ni precipitation hardening conditions and their relationship with the SME/PE properties. In the third year, properties optimization of TiNiCu SMAs will be studied by using Ni-rich Ti49Ni41Cu10 and Ti-rich Ti51Ni39Cu10 SMAs through the processes control as those of the 1st year and 2nd year and to find out the precipitates and the optimal precipitation hardening conditions and their relationship with the SME/PE properties. The experimental results of this subproject can also be applied to the comparison between this subproject and the other one. Consequently, this comparison will feedback to the integral project to find the SMAs properties optimization studied by means of all subprojects.鈦鎳基形狀記憶合金性能最佳化形狀記憶效應超彈性析出硬化TiNi-based Shape Memory alloysProperties OptimizationShape Memory EffectSuperelasticityPrecipitation Hardening