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研究生： 蕭世杰
Hsiao, Shih-Chieh
論文名稱： 探討泰勒模型模擬和實驗間冷軋純銅優選方位強度差異之研究
Understanding the Difference in Preferred Orientation Intensity of Cold-Rolled Copper between Taylor Model Simulation and Experiment
指導教授： 郭瑞昭
Kuo, Jui-Chao
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學及工程學系
Department of Materials Science and Engineering
論文出版年： 2018
畢業學年度： 106
語文別： 中文
論文頁數： 139
中文關鍵詞： 冷軋銅 、泰勒模型 、軋延織構 、優選方位強度
外文關鍵詞： Cold-rolled copper, Taylor model, Rolling texture, Intensity of preferred orientation
相關次數： 點閱：71  下載：3 
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    • 金屬之優選方位在機械性質之異向性中扮演重要的角色。1980年代，Van Houtte提出修正之泰勒模型以預測實驗之軋延織構。至今，許多學者針對實驗以及模擬之優選方位演化進行研究，但無針對兩者間優選方位以及其方位強度之差異進行討論。因此，本論文中我們使用泰勒模型預測銅之軋延織構並比較實驗及模擬之優選方位強度差異。
    本研究分為冷軋實驗和數值模擬。實驗中，銅以低和高單位軋延量進行冷軋。並以XRD和EBSD分析其織構和微結構。模擬中，使用泰勒模型對XRD所測織構進行預測。透過比較優選方位強度在實驗和模擬中之差異，我們試著去了解影響織構轉換之機制。
    在低單位軋延量實驗擬合中，軋延量30%時，實驗之優選方位強度依序為S、R和Bs方位，模擬之優選方位強度依序為R、S和Bs方位。軋延量60%時，實驗之優選方位強度依序為S、R和Bs方位，模擬之優選方位強度依序為R、S和Bs方位。軋延量95%時，實驗之優選方位強度依序為S、R和Cu方位，模擬之優選方位強度依序為R、S和Bs方位。
    高單位軋延量實驗擬合中，軋延量30%時，實驗之優選方位強度依序為S、Bs和R方位，模擬之優選方位強度依序為R、S和Bs方位。軋延量60%時，實驗之優選方位強度依序為Bs、S和R方位，模擬之優選方位強度依序為R、S和Bs方位。軋延量95%時，實驗之優選方位強度依序為S、R和D方位，模擬之優選方位強度依序為R、S和Bs方位。

    The preferred orientation of metals plays a significant role at the anisotropy of mechanical properties. Thus quantitative simulation is important. In this study, for the experiment, cold-rolled copper’s texture and microstructure were measured by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) respectively. For the simulation, the Taylor model is used to simulate the rolling texture and compare the difference between experiment and simulation quantitatively.
    At 30% and 60% reductions, the difference in preferred orientation intensity in terms of volume fraction is less than 5%. At 95% reduction, the differences in preferred orientation intensity in terms of volume fraction are 14.35% and 19.35% respectively.

    中文摘要 I Extended Abstract III 誌謝 XVI 目錄 XVII 表目錄 XXII 圖目錄 XXIII 第一章 前言 1 第二章 文獻回顧 2 2.1　多晶純銅軋延織構 2 2.1.1　前、中期軋延織構 4 2.1.2　後期軋延織構 12 2.2　泰勒理論模型 17 2.2.1　Full Constraints Taylor 模型 17 2.2.2　Relaxed Constraints Taylor 模型 27 第三章 實驗與數值模擬 31 3.1　實驗及分析方法 32 3.1.1　實驗材料及熱處理 32 3.1.2　冷軋延實驗 33 3.1.3　XRD試片製備及分析 35 3.1.4　EBSD試片製備及分析 38 3.2　數值模擬 41 3.2.1　數值模擬之參數優化 42 3.2.2　多晶純銅變形織構之擬合 54 第四章 實驗結果 58 4.1　XRD試片分析結果 58 4.1.1　低單位軋延量試片XRD分析 58 4.1.1.1　極圖分析 59 4.1.1.2　方位分布函數分析 61 4.1.1.3　Fiber分析 63 4.1.2　高單位軋延量試片XRD分析 65 4.1.2.1　極圖分析 65 4.1.2.2　方位分布函數分析 67 4.1.2.3　Fiber分析 69 4.2　EBSD試片分析結果 71 4.2.1　低單位軋延量試片EBSD分析 71 4.2.1.1　反極圖分析 71 4.2.1.2　極圖分析 74 4.2.1.3　方位分布函數分析 76 4.2.2　高單位軋延量試片EBSD分析 77 4.2.2.1　反極圖分析 78 4.2.2.2　極圖分析 80 4.2.2.3　方位分布函數分析 82 4.3　數值模擬結果 84 4.3.1　單一模型擬合 84 4.3.1.1　極圖分析 84 4.3.1.2　方位分布函數分析 87 4.3.1.3　Fiber分析 90 4.3.2　混合模型擬合 93 4.3.2.1　低單位軋延量織構擬合 93 4.3.2.1.1　極圖分析 93 4.3.2.1.2　方位分布函數分析. 95 4.3.2.1.3 Fiber分析 97 4.3.2.2 高單位軋延量織構擬合 99 4.3.2.2.1 極圖分析 99 4.3.2.2.2　方位分布函數分析 101 4.3.2.2.3 Fiber分析 103 第五章 討論 105 5.1　低單位軋延量實驗與模擬結果優選方位演化之差異 105 5.2　高單位軋延量實驗與模擬結果優選方位演化之差異 114 5.3　相異單位軋延量實驗間優選方位之差異 123 第六章 結論 132 參考文獻 134

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