2009-08-012024-05-16https://scholars.lib.ntu.edu.tw/handle/123456789/669149摘要：鈦鎳基形狀記憶合金(TiNi-based SMAs)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，再加上微機電及醫學領域上的需求也是，這些小型化產品對SMAs性能之要求將更為嚴苛，也因而改進TiNi基SMAs性能的研究變為重要。申請人依過去20年來研究TiNi基SMAs之經驗，擬由合金設計、製程控制、析出/固溶強化、變態順序掌握等方法，利用三年時間來研究改進TiNi基SMAs的各種性能，並了解各性能間彼此之互動關係。第一年度擬改進SME之性能，由Ti49.3Ni50.7之Ti3Ni4析出硬化及TiNiV之固溶強化等的SMAs，經由製程控制產出有利的織構，再加上變態順序上掌握R相的產生，來探討各種方法對SME性能改進之影響，並探討其對PE/DC之關連性。第二年度擬改進PE之性能，由Ti50Ni50及析出硬化之Ti49.3Ni50.7 SMAs，經由加工製程之控制並同時掌握變態時R相的產生，來了解各種方法對PE性能改進之影響，並探討其對SME/DC之關連性。第三年度擬改進DC之性能，主要是針對 =0之本質制振能的改進，由Ti50Ni50、析出硬化之Ti49.3Ni50.7及變態時能顯著軟化之Ti51Ni39Cu10等的SMAs，經由加工製程及改變頻率、振幅的情況下，來探討各種方法對本質制振能改進之影響，並了解其與SME/PE間之關連性。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之性能改進能更臻完善。<br> Abstract: TiNi-based shape memory alloys (SMAs) exhibit the uncommon properties of shape memory effect (SME), superelasticity (PE) and high damping capacity (DC). They are usually considered as one of smart materials and have high potential for applying to engineering/medical fields. The trend of industrial products, especially 3C products, is toward the miniaturization. In the meantime, most of SMAs applications in MEMS and medical fields are also in miniature products. The SMAs used in miniature products demand good properties performance, and therefore, the properties improvement of TiNi-based SMAs becomes an important issue at present. The purpose of this 3-year subproject is aimed to improve the properties of TiNi-based SMAs. According to our past studies on TiNi-based SMAs, the SMAs properties can be improved by the methods of alloys design, process control, precipitation/solution hardening, transformation sequence control etc. We will investigate interaction between properties by these improving methods. In the first year, the SME improvement of TiNi-based SMAs will be studied by using Ti49.3Ni50.7 and TiNiV SMAs through the process control to get the optimal texture or the abundance R-phase formation to enhance the SME property. In the second year, the PE improvement of TiNi-based SMAs will be investigated by using Ti50Ni50 and Ti49.3Ni50.7 SMAs through the processes of cold-working and annealing and/or the precipitation hardening. In the third year, the DC improvement of TiNi-based SMAs will be studied by using Ti50Ni50, Ti49.3Ni50.7 and Ti51Ni39Cu10 SMAs through the process control or Ti3Ni4 precipitates to induce abundance R-phase formation and/or the alloy having the significant softening during the transformation. In this final year, the DC property at =0 (inherent internal friction) is emphasized. The experimental results of this subproject can also be applied to the comparison among this subproject and the others. Consequently, this comparison will feedback to the integral project to improve the SMAs properties studied by means of all subprojects.鈦鎳基形狀記憶合金性能改進形狀記憶效應超彈性制振能TiNi-based Shape Memory alloysProperties ImprovementShape Memory EffectSuperelasticityDamping Capacity