| 研究生: |
許峻維 Hsu, Chun-Wei |
|---|---|
| 論文名稱: |
鉍含量對鈦鉬鉍合金熱機性質之影響 Effect of Bi content on properties of Ti-Mo-Bi alloys |
| 指導教授: |
陳瑾惠
Chern Lin, Jiin-Huey 朱建平 Ju, Chien-Ping |
| 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: | 2008 |
| 畢業學年度: | 96 |
| 語文別: | 中文 |
| 論文頁數: | 155 |
| 中文關鍵詞: | 鈦合金 、拉伸性質 、微觀結構 |
| 外文關鍵詞: | Titanium alloys, Microstructure, Tensile properties |
| 相關次數: | 點閱:94 下載:0 |
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本實驗以添加1、3、5、7、9wt%Bi於Ti-15Mo中,探討Bi之添加對鑄造Ti-15Mo之機械性質的影響。結果顯示,隨著Bi量的增加,其抗拉強度、降伏強度會大幅上升,延性會下降,其中以Ti-15Mo-3、5、7Bi擁有較佳之機械性質。因此以Ti-15Mo-3、5、7Bi 進行不同之熱機處理,結果顯示Bi的添加(X≧3)對Ti-15Mo-XBi而言,經過不同之熱機處理,會造成材料脆化。
添加1、3、5wt%Bi於Ti-7.5Mo中,探討Bi之添加對鑄造Ti-7.5Mo合金之機械性質的影響。實驗顯示,隨著Bi量的增加,其抗拉強度、降伏強度會微幅上升,延性會下降。針對Ti-7.5Mo-XBi系統進行熱壓延及熱壓延後固溶之製程,結果顯示,熱壓延之製程會造成Ti-7.5Mo-0、1、3Bi合金抗拉強度、降伏強度上升,延性下降,但添加5wt%鉍時,其抗拉強度和降伏強度下降,但延伸率會上升,而熱壓延後固溶處理製程,隨著鉍含量的增加,其抗拉強度和降伏強度只有微幅的增加之趨勢,而延伸率沒明顯之變化。
In this study, we investigated the effect of Bi content on the mechanical properties of Ti–15Mo-X Bi and Ti–7.5Mo-X Bi fabricated by arc-melted method. The Bi content ranged from 0% to 9 mass%.
Experimental results indicated that that Bi content increase can improve tensile strength of Ti-15Mo alloy largely. And Ti-15Mo-3,5,7Bi will have good tensile property. Therefore, Ti-15Mo-3, 5, 7Bi carries on different thermomechanical processing procedures. The result show that Ti-15Mo-XBi (X≧3) through different thermomechanical treatment procedures will let the material embrittlement.
Experimental results indicated that that Bi content increase can improve tensile strength of Ti-7.5Mo alloy slightly. Then Ti-7.5Mo-XBi alloys are subjected to hot rolling and solid solution after hot rolling. The results show that Ti-7.5Mo-0, 1, 3Bi alloy through hot rolling procedure will increate tensile strength、yield strength and ductility drops, but will decrease tensile strength、yield strength and ductility increase in Ti-7.5Mo-5Bi. Ti-7.5Mo-0, 1, 3Bi alloy through solid solution after hot rolling procedure will increase tensile strength、yield strength slightly but it had no effect on Elongation.
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