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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳志軒 | zh_TW |
| dc.contributor.advisor | Chih-Hsuan Chen | en |
| dc.contributor.author | 周健權 | zh_TW |
| dc.contributor.author | Kian-Kenn Chew | en |
| dc.date.accessioned | 2023-08-16T16:55:06Z | - |
| dc.date.available | 2023-11-09 | - |
| dc.date.copyright | 2023-08-16 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-08-08 | - |
| dc.identifier.citation | 1. Otsuka, K. and C.M. Wayman, Shape memory materials. 1999: Cambridge university press.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/89049 | - |
| dc.description.abstract | 本研究對Ti48.5Ni36.5Cu15塊材進行時效與冷滾再時效處理，並針對其相變態行為、顯微結構、熱循環穩定性、超彈性與形狀記憶效應進行探討。Ti48.5Ni36.5Cu15 經過1050°C一小時固溶後，結構中的Ti(Ni,Cu)2完全回熔於基地內。固溶後的Ti48.5Ni36.5Cu15經過冷滾達到27%厚度減量，晶粒細化與差排抑制了麻田散體的產生，試片進入應變玻璃態。固溶與冷滾後的試片在300°C、400°C、500°C皆有相變態溫度上升的現象，顯示Ti(Ni,Cu)2析出於結構當中。固溶處理後試片經過400°C一小時時效處理，能析出長度為3.5nm，寬度為0.6nm的片狀奈米Ti(Ni,Cu)2析出。厚度減量27%的冷滾試片在經過400°C一小時時效處理後，擁有長度為550nm，寬度為60nm的奈米晶粒，且在垂直於滾壓方向(ND)顯示<111>織構(texture)。該試片在第150次熱循環與第1次循環中，Mp溫度下降0.2°C，擁有良好的熱循環穩定性。形狀記憶效應試驗中，該試片在500MPa應力下達到5.3%應變，只有0.08%殘留應變。 | zh_TW |
| dc.description.abstract | This research investigated aging treatment and cold rolling followed by aging treatment of Ti48.5Ni36.5Cu15. The phase transformation behaviors, microstructures, thermal cyclic stability, superelasticity and memory effect are studied. After solution treatment at 1050°C for 1 hour. Ti(Ni,Cu)2 phase completely dissolved into the matrix. Cold-rolled Ti48.5Ni36.5Cu15 with 27% thickness reduction contains nanograins and dislocations which suppress the formation of martensite and turn the specimen into strain glass state. Both solution-treated and cold-rolled specimens undergone increment in transformation temperature after aging in 300°C, 400°C and 500°C which indicates the formation of Ti(Ni,Cu)2 precipitates in both structures. Solution treated specimen followed by 400°C 1 hr aging precipitates plate-like nanoscale Ti(Ni,Cu)2 with length of 3.5nm and width of 0.6nm. Cold-rolled specimen with 27% thickness reduction followed by 400°C 1 hr aging contains nanograin with legth of 550nm and width of 60nm. It shows <111> texture on normal direction. The specimen experienced a temperature drop of 0.2°C in Mp between the 1st and 150th cycle indicated good thermal cyclic stability. In shape memory effect experiment, the specimen achieved a total strain of 5.3% with only 0.08% irrecoverable strain under a stress of 500MPa. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-08-16T16:55:06Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-08-16T16:55:06Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員會審定書 i
誌謝 ii 摘要 iii Abstract iv 目錄 v 圖目錄 viii 表目錄 xii 第一章 前言 1 第二章 文獻回顧 2 2.1形狀記憶合金簡介 2 2.2麻田散體相變態 4 2.3形狀記憶效應 6 2.4超彈性 9 2.5彈熱效應 11 2.6 TiNi基形狀記憶合金結構與特性 12 2.7 TiNi合金中以Cu取代Ni之影響 14 2.8 TiNiCu合金中Ti(Ni,Cu)2相及固溶處理之影響 15 2.9析出物之影響 16 2.10應變玻璃簡介 19 2.11應變玻璃的原理 20 2.12冷加工導入差排 22 第三章 實驗方法 24 3.1 合金配置與熔煉 24 3.2 滾壓與固溶處理 25 3.3時效與退火處理 26 3.4 相變態溫度量測 26 3.5光學顯微鏡（Optical Microscope, OM） 26 3.6掃描式電子顯微鏡（Scanning Electron Microscopy, SEM） 27 3.7穿透式電子顯微鏡(Transmission Electron Microscopy, TEM) 27 3.8 X光繞射儀（X-ray Diffraction analysis, XRD） 27 3.9 顯微維克式硬度測試(Vickers microhardness) 28 3.10拉伸實驗 28 3.11記憶效應實驗 29 3.12實驗流程 29 第四章 實驗結果與討論 30 4.1固溶處理 30 4.1.1固溶之微結構與成份結果 30 4.1.2固溶之相變溫度結果 35 4.2冷滾及時效對相變態溫度之影響 36 4.2.1冷滾之相變溫度結果 36 4.2.2 300°C時效處理之相變溫度結果 39 4.2.3 400°C時效處理之相變溫度結果 44 4.2.4 500°C時效處理之相變溫度結果 48 4.2.5 300°C、400°C與500°C時效效果討論 51 4.3 顯微結構觀察與檢測 52 4.3.1 CR0%與CR27%試片降溫之XRD結果 52 4.3.2 CR0%時效之XRD結果 55 4.3.3 CR0%與CR27%時效之XRD結果 57 4.4 時效對微結構之影響 58 4.4.1 500°C 96hr時效對顯微結構影響之結果 58 4.4.2 500°C 1hr時效對顯微結構影響之結果 66 4.4.3 400°C 1hr時效對顯微結構影響之結果 69 4.5無應力熱循環測試結果 72 4.6超彈性 75 4.7形狀記憶效應 80 4.7.1 CR0% 形狀記憶效應 80 4.7.2 CR0% 400 1hr 形狀記憶效應 83 4.7.3 CR27% 400 1hr 形狀記憶效應 85 第五章 結論 88 參考文獻 90 | - |
| dc.language.iso | zh_TW | - |
| dc.title | Ti48.5Ni36.5Cu15形狀記憶合金塊材 冷滾與時效處理之顯微結構與機械性質研究 | zh_TW |
| dc.title | Research on Microstructures and Mechanical Properties of Coll-Rolled and Aged Ti48.5Ni36.5Cu15 Shape Memory Alloy | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 林新智;陳建彰 | zh_TW |
| dc.contributor.oralexamcommittee | Hsin-Chih Lin;Jian-Zhang Chen | en |
| dc.subject.keyword | TiNiCu 形狀記憶合金,Ti(Ni,Cu)2析出,時效處理,熱循環穩定性,形狀記憶效應,冷滾,退火, | zh_TW |
| dc.subject.keyword | TiNiCu shape memory alloy,Ti(Ni,Cu)2 precipitate,aging treatment,thermal cyclic stability,shape memory effect,cold-roll,annealing, | en |
| dc.relation.page | 98 | - |
| dc.identifier.doi | 10.6342/NTU202302997 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2023-08-09 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 機械工程學系 | - |
| 顯示於系所單位： | 機械工程學系 | |
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|---|---|---|---|
| ntu-111-2.pdf | 7.77 MB | Adobe PDF | 檢視/開啟 |
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