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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 吳錫侃 | |
dc.contributor.author | Yi-Ching Chang | en |
dc.contributor.author | 張翊竫 | zh_TW |
dc.date.accessioned | 2021-06-08T02:38:55Z | - |
dc.date.copyright | 2018-07-19 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-07-10 | |
dc.identifier.citation | [1] L.C. Chang, T.A. Read, Trans. AIME., 189 (1951) 47-52.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/20023 | - |
dc.description.abstract | 本文研究經固溶處理的Ti50Ni50、Ti40.5Ni49.5Hf10及Ti50Ni50-xYx (Y= Fe、Pd、Cu) SMAs,以及固溶再經時效處理的極富鎳SMAs,經50次熱循環後探討在不同的麻田散體變態下其變態溫度所受的影響,發現變態剪應變s值越大,在熱循環時變態溫度被壓抑的也越大,同時Ti3Ni4的析出可有效阻止此種壓抑,但Ti2Ni3者則不能。本文同時研究極富鎳Ti47.8Ni52.2 (A合金)及Ti47.6Ni52.4 (B合金)在固溶處理後於300~600°C時效之相變態行為,發現A、B兩合金的相變態行為很相近,但B合金的Ni含量較高,而有較寬的變態峰,較低的ΔH值及較高的變態溫度遲滯。同時其變態行為可依時效溫度及時間分成三個階段,Period I時僅有Ti3Ni4析出,在Period II為Ti2Ni3析出並在其附近有Ti3Ni4空乏區,Period III時Ti3Ni4完全消失只剩Ti2Ni3析出。在300~500°C時效時,A/B合金都處於Period I,並為B2↔R或B2↔R↔B19’相變態,但在500°C 250hr以上進入Period II。在550°C時效25~1000hr時為在Period II的B21↔R1↔B19’1(與Ti3Ni4相關) + B22↔R2↔B19’2(與Ti2Ni3相關)四階相變態;在600°C的短時間時效為Period I的B21↔B19’1,中期時間時效為Period II的B21↔B19’1 + B22↔R2↔B19’2三階相變態,在長時間時效後為Period III的B22↔R2↔B19’2相變態。 | zh_TW |
dc.description.abstract | Transformation temperatures of solid-solution(SS) treated Ti50Ni50, Ti40.5Ni49.5Hf10, Ti50Ni50-xYx (Y= Fe、Pd、Cu) SMAs and aged Ni-rich TiNi SMAs are characterized by 50 times thermal cycles. Experimental results indicate that the martensitic transformation exhibited higher shear strain value causes larger depression on transformation temperature during thermal cycling. In aged Ni-rich TiNi SMAs, Ti3Ni4 precipitates(ppts) can inhibit the depression of transformation temperature, while Ti2Ni3 ppts can’t. The transformation characteristics of aged Ni-rich Ti47.8Ni52.2 (A alloy) and Ti47.6Ni52.4 (B alloy) SMAs are also investigated. Both alloys are SS and then aged at 300 ºC to 600°C and exhibit similar phase transformation behavior. With higher Ni content, B alloy has broader transformation peak, lower ΔH value and higher thermal hysteresis. Periods I~III are observed when both alloys are aged at different temperature and time. In period I, only Ti3Ni4 ppts distribute homogeneously in the alloy. In period II, the Ti2Ni3 ppts form and the Ti3Ni4 depletion zone appear around Ti2Ni3 plates. In period III, more Ti2Ni3 ppts form and grow and Ti3Ni4 ppts dissolve entirely. During aging from 300 ºC to 500°C, A/B alloys are almost in period I and behave a B2↔R or B2↔R↔B19’ transformation. When aging at 500°C for more than 250hrs, A/B alloys are in period II. When aging at 550°C for 25~1000hrs, A/B alloys are in period II and a four-stage transformation B21↔R1↔B19’1 (related to Ti3Ni4 ppts) + B22↔R2↔B19’2 (related to Ti2Ni3 ppts) occurs. When aging at 600°C for the early aging time, A/B alloys are in period I, a single-stage transformation B21↔B19’1 occurs. For the middle aging time, A/B alloys are in period II, a three-stage transformation (B21↔B19’1) + (B22↔R2↔B19’2) occurs. For the longer aging time, A/B alloys are in period III, and a two-stage transformation B22↔R2↔B19’2 appears. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T02:38:55Z (GMT). No. of bitstreams: 1 ntu-107-R05527016-1.pdf: 12890445 bytes, checksum: cf08075e2fa35ef8fceb055a2e9aaf7e (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 摘要 i
Abstract iii 目錄 v 第一章 前言 1 第二章 文獻回顧 3 2.1 形狀記憶合金簡介 3 2.1.1 熱彈型麻田散體相變態 4 2.1.2 形狀記憶效應(SME)之機制 6 2.1.3 超彈性(PE)之機制 7 2.2 TiNi形狀記憶合金之結晶結構 9 2.3 添加第三合金元素的TiNiX形狀記憶合金 11 2.4 富鎳TiNi形狀記憶合金之時效處理及其效應 12 2.5 富鎳TiNi形狀記憶合金之多階相變態行為 13 2.6 TiNi合金之制振能特性 17 2.7 熱循環(Thermal Cycling)對TiNi形狀記憶合金之影響 18 第三章 實驗步驟 41 3.1 試片準備 41 3.2 熱處理 42 3.3 差分掃描熱分析儀(DSC)量測 42 3.4 微硬度(Vickers Mircohardness)量測 44 3.5 光學顯微鏡(OM)與掃描式電子顯微鏡(SEM)觀察 44 第四章 熱循環對鈦鎳基形狀記憶合金變態溫度的影響 51 4.1 熱循環對多種鈦鎳基形狀記憶合金的影響 51 4.1.1 熱循環對Ti50Ni50 SMA的影響 51 4.1.2 熱循環對Ti48Ni52經600°C×150h時效SMA的影響 51 4.1.3 熱循環對Ti40.5Ni49.5Hf10 SMA的影響 52 4.1.4 熱循環對Ti50Ni46Fe4 SMA的影響 52 4.1.5 熱循環對Ti48.7Ni51.3經350°C×24h時效SMA的影響 53 4.1.6 熱循環對Ti50Ni37Pd13 SMA的影響 53 4.1.7 熱循環對Ti50Ni30Cu20 SMA的影響 54 4.1.8 熱循環對Ti50Ni48Fe2 SMA的影響 54 4.1.9 熱循環對Ti48.7Ni51.3經450℃×4h時效SMA的影響 55 4.1.10 熱循環對Ti50Ni40Cu10 SMA的影響 56 4.2 鈦鎳基形狀記憶合金之變態剪應變比較 56 4.3 鈦鎳基形狀記憶合金硬度對熱循環的影響 57 4.4 熱循環對不同麻田散體變態序列的變態溫度影響之比較 58 4.4.1 熱循環對B2↔B19’麻田散體相變態的比較 58 4.4.2 熱循環對B2↔R麻田散體相變態的影響 59 4.4.3 熱循環對B2↔B19麻田散體相變態的影響 60 4.4.4 熱循環對B2↔R↔B19’麻田散體相變態的影響 61 4.4.5 熱循環對B2↔B19↔B19’麻田散體相變態的影響 62 4.5 本章之結語 63 第五章 時效對Ti47.8Ni52.2及Ti47.6Ni52.4形狀記憶合金變態特性的影響 85 5.1 時效對Ti47.8Ni52.2及Ti47.6Ni52.4相變態之影響 85 5.1.1 僅固溶處理之DSC結果 85 5.1.2 300°C時效之DSC結果 85 5.1.3 350°C時效之DSC結果 87 5.1.4 400°C時效之DSC結果 88 5.1.5 450°C時效之DSC結果 89 5.1.6 500°C時效之DSC結果 90 5.1.7 550°C時效之DSC結果 91 5.1.8 600°C時效之DSC結果 94 5.1.9 DSC結果之討論 96 5.2 顯微組織圖之觀察 97 5.3 與Ti48Ni52 SMA TTT(Temperature-Time-Transformation)圖之比較 98 5.4 Ti47.8Ni52.2及Ti47.6Ni52.4 SMA時效後之變態順序 99 5.4.1 時效於300°C~500°C 99 5.4.2 時效於550°C 100 5.4.3 時效於600°C 100 5.4.4 時效於300°C~600°C經歷的階段及DSC變態 101 5.5 各變態峰值的遲滯溫度 102 5.6 時效對於B2→R變態影響之綜合討論 102 5.7 鎳含量對350°C時效B19’→R變態之影響 103 5.8 不同成份鈦鎳合金在固溶處理後之微硬度比較 104 5.9 本章之結語 105 第六章 結論 182 6.1 多種鈦鎳基SMAs熱循環之研究 182 6.2 Ti47.8Ni52.2及Ti47.6Ni52.4 SMAs時效之研究 183 參考資料 185 | |
dc.language.iso | zh-TW | |
dc.title | 熱循環及時效對鈦鎳基形狀記憶合金麻田散體變態影響之研究 | zh_TW |
dc.title | Effects of Thermal Cycling and Aging on Martensitic Transformation of TiNi-based Shape Memory Alloys | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 林新智,陳志軒,張世航,周棟勝 | |
dc.subject.keyword | 鈦鎳基形狀記憶合金,熱循環,時效,多階麻田散體相變態,Ti3Ni4/Ti2Ni3析出物, | zh_TW |
dc.subject.keyword | TiNi SMAs,Thermal cycling,Aging treatment,Multi-stage martensitic transformation,Ti3Ni4/Ti2Ni3 precipitates, | en |
dc.relation.page | 189 | |
dc.identifier.doi | 10.6342/NTU201801307 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2018-07-11 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
顯示於系所單位: | 材料科學與工程學系 |
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