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研究生：	朱胤碩 Chu, Yin-Shuo
論文名稱：	熱機處理對鑄造Ti-7.5Mo合金結構與機械性質之研究 Study of thermomechanical treatment on structure and mechanical properties of cast Ti-7.5Mo alloys
指導教授：	朱建平 Ju, Chien-Ping 陳瑾惠 Chern Lin, Jiin-Huey
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：	2011
畢業學年度：	99
語文別：	中文
論文頁數：	102
中文關鍵詞：	鈦、鉬、強化處理、α”
外文關鍵詞：	titanium, molybdenum, strengthening treatment, α”
相關次數：	點閱：89 下載：1
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本實驗藉由對Ti-7.5Mo合金進行不同的強化處理，探討其金相與機械性質的關係，Ti-7.5Mo在經過強化處理1，呈現α’+β相，具有與鑄造的商用Ti-6Al-4V (ELI)較相近之拉伸性質，降伏強度為946MPa、最大拉伸強度為1339MPa、伸長量5.1%、彈性模數為104GPa，與鑄造的商用Ti-6Al-4V (ELI)比較，具有較高的拉伸強度、較低的伸長量、較低的彈性模數，適合用於骨板的製作，而經過強化處理2後，其強度大幅下降，但伸長量大幅提升，其性質較趨近於Ti-7.5Mo as cast。
在強化處理3條件X3～X5，Y3～Y6，其呈現α”相，其拉伸強度都較強化處理2之拉伸強度高，且隨著強化處理3條件的改變，其強化效果越強。而進行強化處理3條件X6，隨著Y3增加至Y6，其強度反而隨之降低。

In this study, the Ti-7.5Mo alloy of different strengthening treatment, to discuss the relationship between microstructure and mechanical properties. The Ti-7.5Mo with Strengthening Treatment 1 showing α’+β phase is similar to the tensile properties with the casting of commercial Ti-6Al-4V (ELI). The yield strength is 946MPa, the maximum tensile strength is 1339MPa, the elongation is 5.1%, the elastic modulus is 104GPa. To compare with the casting of the commercial Ti-6Al-4V (ELI), the Ti-7.5Mo with Strengthening Treatment 1 with higher tensile strength, lower elongation, lower modulus of elasticity, and suitable for the production of bone plates. The strength decrease greatly but the elongation rise highly after Strengthening Treatment 2. The mechanical properties are more like Ti-7.5Mo as cast.

After Strengthening Treatment 3, Condition X3~ X5, Y3 to Y6, it is present α" phase, the tensile strength is higher than the Strengthening Treatment 2 and with the Strengthening Treatment 3 condition changes, the strengthened effect is stronger, while the Strengthening Treatment 3 Condition X6, with Y3 changing to Y6, the strength is decreases.

摘要.......................................................I
abstract ................................................ II
誌謝.....................................................III
總目錄.....................................................V
圖目錄..................................................VIII
表目錄....................................................XI
第一章前言 .................................................1
1-1 研究背景................................................1
1-2 金屬生醫材料之簡介.......................................2
1-2-1 316L不鏽鋼...........................................3
1-2-2 鈷基合金..............................................3
1-2-3 鈦基合金..............................................4
1-3 金屬生醫材料之應用.......................................5
1-3-1 人工關節..............................................7
1-3-2 骨折固定..............................................8
1-3-3 人工植牙.............................................11
1-4 研究目的...............................................13
第二章 鈦及鈦合金...........................................15
2-1 鈦的歷史...............................................15
2-2 鈦的製備...............................................17
2-2-1 亨特(Hunter)法......................................17
2-2-2 克羅爾(Kroll)法......................................18
2-2-3 FFC劍橋法...........................................19
2-3 鈦合金的分類...........................................21
2-3-1 α或near α型鈦合金....................................22
2-3-2 β型鈦合金............................................25
2-3-3 α＋β型鈦合金.........................................29
2-4 鈦合金的非平衡相........................................31
2-5 鈦與鈦合金的性質與應用..................................33
第三章理論基礎 ............................................37
3-1 鈦合金之設計理論........................................37
3-1-1 Mo當量方程式.........................................37
3-1-2 電子結構的分子軌域計算................................38
3-1-3 分離式多樣化叢集方式..................................39
3-2 金屬的強化機制.........................................40
3-2-1 加工硬化.............................................41
3-2-2 固溶強化.............................................43
3-2-3 細晶粒強化...........................................43
3-2-4 析出強化.............................................44
3-3 拉伸之破斷機制.........................................50
3-3-1 延性破斷.............................................51
3-3-2 脆性破斷.............................................53
3-4 應力遮蔽效應...........................................53
第四章實驗步驟及方法........................................54
4-1 實驗流程圖.............................................54
4-2 合金材料的製備 ........................................55
4-3 合金熔煉與鑄造.........................................55
4-4 試片製作...............................................59
4-5 拉伸試驗...............................................59
4-6 微硬度試驗.............................................60
4-7 X光繞射相分析..........................................62
4-8 金相組織觀察...........................................63
4-9 掃描式電子顯微鏡分析....................................64
第五章 實驗結果與討論.......................................65
5-1 成分分析以及相分析......................................65
5-2 金相組織分析...........................................73
5-3 拉伸機械性質及其破斷面分析...............................80
5-4 硬度機械性質分析........................................94
第六章結論 ................................................98
第七章參考資料 ............................................99
                                    

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