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研究生：	袁成華 Yuan, Chen-Hua
論文名稱：	鈦鉬合金熱處裡後疲勞性質之研究 Fatigue Properities of Titanium-Molybdenum after Heat Treatment
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：	2005
畢業學年度：	93
語文別：	中文
論文頁數：	86
中文關鍵詞：	鈦合金、疲勞、表面粗糙度
外文關鍵詞：	surface roughness, fatigue, titanium alloy
相關次數：	點閱：118 下載：1
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　　鈦合金具有低密度、高耐蝕性及優良的生物相容（biocompatibility），被廣泛使用於許多生醫用途。鈦合金強化的方式有許多形式，但最常使用的是加工硬化及熱處理。
　　疲勞（fatigue）是結構受動態或規律性變動應力時的一種破損形式。週期性應力/應變皆會施加於材料上，應力集中於某些小區域-表面刻痕或微結構不均質處，造成塑性變形，隨著每一次的週期性荷重，逐漸累積塑性變形，微裂縫成核為疲勞裂縫起始。
　　從實驗室自行研發Ti-A及Ti-B兩種鈦合金各自於滾軋加工及固溶處裡後機械性質較佳的條件，作為本次實驗的材料。此外根據實驗室之前對於根據實驗室之前對於鑄造鈦合金疲勞性質的研究發現：疲勞破壞多起始於鑄造過程所產生表面/次表面孔洞。因此利用實驗製程中不同的表面處裡來控制表面刻痕的粗糙度，避免孔洞對於疲勞性質的影響。
　　從實驗結果發現，表面刻痕粗糙度越小，表面刻痕粗糙度越小，疲勞性質越佳，抗疲勞強度越高，疲勞壽命越長。元件表面是否無缺陷對於元件使用壽命有十分大的影響。

　　The titanium alloy has low density, good corrosion resistance and good biocompatibility so used in biomaterial way very much.
　　Fatigue means material failure by a regular loading, and most material failure way is fatigue when used. So we research fatigue properties of titanium alloy. We used working harding and heat treatment to enhance titanium alloy, and use surface treatment to control roughness of samples.
　　We find that the lower roughness the higher fatigue life.

總目錄
總目錄....................................................6
圖目錄....................................................9
表目錄...................................................12
第一章  前言  ...........................................13
1-1 研究背景.............................................13
1-2 研究目的.............................................14
第二章  文獻回顧.........................................15
2-1  生醫材料簡介........................................15
2-1-1  生醫材料的分類....................................15
2-1-2  金屬生醫材料的發展................................17
2-2  純鈦與鈦合金基本簡介................................19
2-2-1  純鈦..............................................19
2-2-2  鈦合金與其分類....................................21
2-2-3  醫用鈦合金的發展..................................24
2-3  生醫鈦合金性質改善..................................26
2-3-1  加工硬化（working hardening）.....................26
2-3-2  熱處理(Heat Treatment)............................27
2-4  二元平衡相圖........................................28
2-5  疲勞破損............................................29
2-5-1  疲勞測試法........................................29
2-5-2  疲勞破損成長機構..................................30
2-5-3  影響材料疲勞性質之因素............................32
2-6  鈦及鈦合金的疲勞性質................................34
2-6-1  彈性模數之影響....................................35
2-6-2  強度之影響........................................35
2-6-3  合金成分/相之影響.................................36
2-6-4  材料表面狀況之影響................................36
第三章  實驗步驟及方法...................................51
3-1  實驗流程............................................51
3-2  試料準備............................................51
3-2-1熔煉鑄造設備........................................51
3-2-2 熔煉及鑄造過程.....................................52
3-2-3 滾軋過程...........................................52
3-2-4 試片規格及尺寸.....................................53
3-2-5 熱處理.............................................53
3-2-6 表面處理...........................................54
3-3 表面粗糙度測量.......................................54
3-4 疲勞性質分析.........................................55
3-5金相顯微結構與材料分析................................55
3-5-1 X光繞射相分析(XRD).................................55
3-5-2 SEM(掃瞄式電子顯微鏡)觀察..........................56
3-5-3 金相顯微結構觀察...................................56
第四章  結果與討論.......................................65
4-1  表面粗糙度測量......................................65
4-2  相結構分析及顯微組織分析............................65
4-3  疲勞試驗............................................67
4-3-1  A-Ⅲ 900MPa.......................................68
4-3-2  A-Ⅲ 800MPa.......................................69
4-3-3  B-Ⅲ 900MPa.......................................69
4-3-4  疲勞測試結果討論..................................70
4-4  疲勞破損表面分析....................................72
4-5  表面刻痕粗糙度與疲勞性質討論........................73
第五章  結論.............................................94
第六章  參考資料.........................................95

                                    

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莊政和，鈦鉬合金熱處理後機械性質之研究，民國93年。

校內：2010-01-28公開
校外：2010-01-28公開

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