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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳發林 | |
dc.contributor.author | Yi-Ting Lin | en |
dc.contributor.author | 林宜庭 | zh_TW |
dc.date.accessioned | 2021-06-16T22:58:09Z | - |
dc.date.available | 2014-08-15 | |
dc.date.copyright | 2012-08-15 | |
dc.date.issued | 2012 | |
dc.date.submitted | 2012-08-08 | |
dc.identifier.citation | [1] S. Kavesh., “Metallic Glasses, ”American Society for Metals, Metal Park, 36 (1978).
[2] P. Duwez, R. H. Willens and W. Klement, “Continuous series of metastable solid solutions in silver-copper alloys,” J. Appl. Phys., 31: 1136 (1960). [3] W. Klement, R. H. Wilens and P. Duwez, “Non-crystalline structure in solidified gold-silicon alloys,” Nature, 187: 869 (1960). [4] 吳學陞,工業材料,149 (1999). [5] A. Inoue, “Bulk amorphous alloys - practical characteristics and applications, ” Materials Science Foundations, 6 (1999). [6] A. Inoue and K. Hashimoto, “Amorphous and Nanocrystalline Materials,” A Wiley-Interscience Publication (2001). [7] A. Inoue, H. Koshiba, T. Zhang and A. Makino, “Wide supercooled liquid region and soft magnetic properties of Fe56Co7Ni7Zr0-10Nb (or Ta)0-10B20 amorphous alloys,” J. Appl. Phys., 83: 1967 (1998). [8] J. A. Miller, “Alloying Approaches for High Strength/Oxidation Resistant Nickel-Base Superalloys Utilizing Rapid Solidification,” Conf. On Rapid Solidification Processing: Principles and Technologies, paper II.5 (1986). [9] R. H. Belden, “Commercializing a New Product,” Chem. Eng. Prog, 27 (1985). [10] N. C. Koon, “Impact of Rapid Solidification Technology on Magnetic Alloy Design,” Conf. On Rapid Solidification Processing: Principles and Technologies, paper II.6 (1986). [11] H. A. Davies,“The formation of Metallic Glasses,”Phys. Chem. Glasses , 17:159(1976) [12] Lieng-Huang Lee, “Solid surface tension of amorphous and crystalline selenium,”J. Non-Crystalline Solids ,6:213 (1971) [13] 1. Richard Zallen, “The Physics of Amorphous Solids,” A Wiley-Interscience Publication, (1983). [14] J. Kramer, “Non conductive transformations in metal,” Ann. Physik, 19: 37 (1934). [15] P. Duwez and R. H. Willens, “Rapid quenching of liquid alloys,” Trans. Met. Soc. AIME, 227: 362 (1963). [16] H. Bessemer, U.S. Patent No. 49053, (1865). [17] H. S. Chen and C. E. Miller, “A rapid quenching technique for the preparation of thin uniform films of amorphous solids,” Rev. Sci. Instrum, 41: 1237 (1970). [18] H. H. Liebermann and C. D. Graham, “Production of amorphous alloy ribbons and effects of apparatus parameters on ribbon dimensions,” IEEE Trans. Magn., 12: 921 (1976). [19] M. C. Narasimhan, U.S. Patent No. 4142571, (1979). [20] C. J. Byrne, A. M. Kueck, S. P. Baker and P. H. Steen, “In situ manipulation of cooling rates during planar-flow melt spinning processing,” Mater. Sci. Eng. A, 459: 172 (2007). [21] P. H. Steen and C. Karcher, “Fluid mechanics of spin casting of metals,” Annu. Rev. Fluid Mechanics, 29: 373 (1997). [22] J. K. Carpenter and P. H. Steen, “Planar-flow spin-casting of molten metals: process behaviour,” J. Mater. Sci., 27: 215 (1992). [23] T. J. Praisner, J. S.-J. Chen and A. A. Tseng, “An experimental study of process behavior in planar flow melt spinning,” Met. Mater. Trans. B, 26B: 1199 (1995). [24] P. H. Steen and C. Karcher, “Fluid mechanics of spin casting of metals,” Annu. Rev. Fluid Mechanics, 29: 373 (1997). [25] V. I. Tkatch, S. N. Denisenko and O. N. Beloshov,“Direct measurements of the cooling rate in the single roller rapid solidification technique,”Acta Met.,45: 2821(1997) [26] A. G. Gillen and B. Cantor,“Photocalorimetric cooling rate measurements on a Ni-5wt%Al alloy rapidly solidified by melt spinning,”Acta Met.,33:1813(1985) [27] B. Cantor, W. T. Kim, B. P. Bewlay, A. G. Gillen,“Microstructure cooling rate correlations in melt-spun alloys”J. Mater. Sci., 26: 1266 (1991). [28] K. Takeshita and P. H. Shingu,“Thermal contact during the cooling by the single roller chill block casting,”Trans. Japan Ins. Metals, 27: 454(1986) [29] S. C. Huang and H. C. Fiendler, “Amorphous ribbon formation and the effects of casting velocity, ” Mater. Sci. Eng.,51: 39(1981) [30] E. M. Gutierrez and J. Szekely, “A mathematical model of the planar flow melt spinning process, ” Met. Trans. B, 17B: 695(1986). [31] X. J. Wang, X. D. Chen, T. D. Xia, W. Y. Yu and X. L. Wang,“Influencing factors and estimation of the cooling rate within and amorphous ribbon,”Intermetallics,12: 1233(2004) [32] M. Bussmann, J. Mostaghimi , D.W. Kirk, and J.W. Graydon, ” A numerical study of steady flow and temperature fields within a melt spinning puddle” , Int. J. Heat Mass Transfer ,45: 3997 (2002). [33] L. Heping, C. Wenzhi, Q. Shengtaq, and L. Guodong, ”Numerical simulation of initial development of fluid flow and heat transfer in planer flow casting process”, Met. Mater. Trans. B, 40B: 411 (2009). [34] S. C. Huang and H. C. Fiendler,“Effects of wheel surface conditions on the casting of amorphous metal ribbons,”Met. Trans. A,12A: 1107(1981) [35] J. K. Carpenter and P. H. Steen,“On the heat transfer to the wheel in planar-flow melt spinning,”Met. Trans. B, 21B: 279 (1990) [36] T. J. Praisner, J. S.-J. Chen and A. A. Tseng, “An experimental study of process behavior in planar flow melt spinning,” Met. Mater. Trans. B, 26B: 1199 (1995). [37] S. L. Wu, C. W. Chen, W. S. Hwang, and C. C. Yang, “Analysis for melt puddle in the planar flow casting process-A mathematical modelling study” Appl math modeling, 16: 394 (1992). [38] F. S. Shtr,“Viscous behavior and glass formation in amorphous alloy”J. Mater. Sci., 27: 2340 (1992). [39] D. Schwabe, 'Marangoni effects in crystal growth melts,' Phys. Chem. Hydrodynamics, 2:263 (1981). [40] G. S. Fulcher,“Analysis of recent measurement measurements of the ciscosity of glasses,”J. Amer. Ceram. Soc. ,8 : 339 (1925). [41] C. W. Hirt and B. D. Nichols, “Volume of fluid (VOF) method for the dynamics of free boundaries,” J. Comput. Phys., 39: 201 (1981). [42] J. U. Brackbill, D. B. Kothe, and C. Zemach. “A Continuum Method for Modeling Surface Tension,” J. Comput. Phys., 100: 335 (1992). [43] 計算流體力學分析-CFD軟件原理與應用,清華大學出版社(2004). [44] 李人獻,“有限體積法基礎,” 國防工業出版社,北京(2008). [45] B. P. Leonard and S. Mokhtari, “ULTRA-SHARP Nonoscillatory Convection Schemes for High-Speed Steady Multidimensional Flow,” NASA Lewis Research Center, (1990). [46] R. I. Issa, “Solution of Implicitly Discretized Fluid Flow Equations by Operator Splitting,” J. Comput. Phys., 62:40 (1986). [47] R. Courant, K. Friedrichs and H. Lewy, 'On the partial difference equations of mathematical physics', IBM Journal, 215 (1967). [48] Ubbink, O., “Numerical prediction of two fluid systems with sharp interfaces,” Technology & Medicine, (1997). [49] I. Choquet, S. Bjo¨rklund, J. Johansson and J. Wigren,“Clogging and lump formation during atmospheric plasma spraying with powder injection downstream the plasma gun,”J. Thermal Spray Tech.,16(4): 512 (2007). | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/64729 | - |
dc.description.abstract | 在研究平面流鑄製造非晶質薄帶中,以分析流體動力相關之操作參數為主,缺少對於熱傳效應方面的研究,但在薄帶固化過程中熱傳效應極為重要,所以本研究操控熱傳的操作參數(輥輪熱傳係數、進料溫度) ,利用熱流分析軟體Ansys-Fluent探討其對非晶質薄帶固化過程的影響。本研究設定鑄造材料為 ,設定進料壓力為41125Pa與輥輪速度為20m/s時,分析輥輪熱傳係數的範圍為120 至1 和進料溫度的範圍為1501K至1684K。
分析改變輥輪熱傳係數之模擬結果,發現影響薄帶厚度的因素可能為熔潭長度與冷卻速率,當輥輪熱傳係數在120至400 ,薄帶厚度會由39.8μm降低至36.3μm;當輥輪熱傳係數在400至1000 ,薄帶厚度會由36.3μ升高至37.2μm。在輥輪熱傳係數低於400 ,此時冷卻速率的差異不大,固化線會沿著熔潭長度延伸,熔潭長度越長,固化線越高,所以薄帶厚度會隨著輥輪熱傳上升而下降。當輥輪熱傳係數較高時,因為冷卻速率上升,熔潭長度影響不大,所以薄帶厚度會逐漸上升。 分析改變進料溫度之模擬結果,發現影響薄帶厚度的因素可能為液體黏度與冷卻速率,當進料溫度在15001~1548K,薄帶厚度由36.3μm升高至36.6μm;當進料溫度在1548~1683K,薄帶厚度由36.6μm降低至36.2μm。此外,也發現進料溫度較高時會造成下游熔潭區有較多的渦流產生,進而使薄帶厚度變化率較大。 經由此研究可歸納出當輥輪熱傳係數在400 以上,進料溫度介於1500K至1548K,熔潭流場與薄帶厚度皆有較穩定之情形,可供給未來平面流鑄相關實驗做參考。 | zh_TW |
dc.description.abstract | In the previous studies, the manufactured of amorphous ribbons by planar flow casting, which is mainly analyzed by operating parameters based on fluid dynamics but is seldom studied in the effect of heat transfer. However, the effect of heat transfer is extremely important in the process of ribbon solidification, thus this study focuses on the operating parameters of heat transfer (wheel heat transfer coefficient, molten jet temperature) and researches the effect of amorphous ribbon solidification with different operating parameter by Ansys-Fluent. The casing material is , molten jet pressure is 41125 Pa and the speed of wheel is 20 m/s in this study. The wheel heat transfer coefficient is set from 120 to 1 and molten jet temperature is set from 1501 K to 1684 K.
From the simulated results of different wheel heat transfer coefficient, it is found that puddle length and cooling rate may affect thickness of ribbon. When the wheel heat transfer coefficient is set from 120 to 400 , the thickness of ribbon decreases from 39.8μm to 36.3μm; however, when the wheel heat transfer coefficient is set from 400 to 1000 , the thickness of ribbon increase from 36.3μm to 37.2μm. The cooling rate is no apparently different when wheel heat transfer coefficient lower than 400 , at this time the thickness of ribbon becomes thinner while the puddle length get shorter. When wheel heat transfer coefficient higher than 400 , puddle length has no significant influence on the thickness of ribbon, which gets thicker as cooling rate rises. From the simulated results of different molten jet temperature, it is found that viscosity of fluid and cooling rate may affect thickness of ribbon. When molten jet temperature is set from 1501K to 1548K, the thickness of ribbon rises from 36.3μm to 36.6μm. The thickness of ribbon decreases from 36.3μm to 36.2μm when molten jet temperature is set from 1548K to 1683K. In addition, it is found that molten jet temperature causes more eddy currents in downstream of puddle, which leads the changing rate of thickness of ribbon increase. From this study it can be summed up that the velocity field of puddle and the thickness of ribbon become stable when wheel heat transfer coefficient higher than 400 and molten jet temperature between 1500K and 1548K. This study could provide associated studies of planar flow casting as reference. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T22:58:09Z (GMT). No. of bitstreams: 1 ntu-101-R99543034-1.pdf: 2704670 bytes, checksum: 7700d9d7221e314f3711a0a54aed3128 (MD5) Previous issue date: 2012 | en |
dc.description.tableofcontents | 誌謝 i
摘要 ii Abstract iii 目錄 v 圖目錄 vii 表目錄 ix 符號說明 x 緒論 1 1-1 非晶質金屬 1 1-2 文獻回顧 3 1-3 研究動機與方法 10 1-4 研究目標 10 第二章 理論模型 11 2-1 物理模型建立 11 2-2 物理參數設定 13 2-3 數學模式 15 2-3.1 統御方程式 15 2-4 假設條件、邊界條件與初始條件 17 2-5 數值方法 20 2-6 薄帶厚度計算方式 25 第三章 輥輪熱傳係數對薄帶厚度之探討 26 3-1 操作條件 26 3-2 薄帶厚度分析 28 3-3 熔潭區分析 30 3-3.1 熔潭長度分析 30 3-3.2 熔潭區薄帶厚度分析 32 3-3.3 熔潭流場分析 34 3-4 冷卻速率與輥輪冷卻水分析 37 3-4.1 冷卻速率分析 37 3-4.2 輥輪冷卻水分析 39 3-5 比較文獻結果 41 3-6 結果與討論 43 第四章 進料溫度對薄帶厚度之探討 45 4-1 操作條件 45 4-2 薄帶厚度之分析 46 4-3 熔潭區之分析 48 4-3.1 熔潭長度分析 48 4-3.2 熔潭區薄帶厚度分析 50 4-3.3 流場分析 52 4-4 冷卻速率分析 54 4-4.1 冷卻速率 54 4-4.2 輥輪熱通量 56 4-5 比較文獻結果 58 4-6 結果與討論 60 第五章 結論與未來展望 61 5-1 結論 61 5-2 未來展望 62 參考文獻 63 | |
dc.language.iso | zh-TW | |
dc.title | 節能非晶質矽鋼片固化特性探討 | zh_TW |
dc.title | Study of solidification characteristics about energy-saving amorphous steel | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 陳朝光,鍾志昂,張敏興,吳崇勇 | |
dc.subject.keyword | 非晶質,平面鑄造,輥輪熱傳係數,進料溫度,Fe78B13Si9, | zh_TW |
dc.subject.keyword | amorphous,planar flow casting,wheel heat transfer coefficient,molten jet temperature,Fe78B13Si9, | en |
dc.relation.page | 67 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2012-08-09 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 應用力學研究所 | zh_TW |
顯示於系所單位: | 應用力學研究所 |
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