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題 名 | Ti-6Al-4V合金的低壓擴散接合研究 |
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作 者 | 葉明勳; 莊東漢; | 書刊名 | 材料科學 |
卷 期 | 27:2 1995.06[民84.06] |
頁 次 | 頁141-146 |
分類號 | 440.39 |
關鍵詞 | 擴散接合; 壓力; 表面製備; 超塑性夾層; Diffusion bonding; Pressure; Surface preparation; Superplastic interlayer; |
語 文 | 中文(Chinese) |
中文摘要 | 為了降低擴散接合製程所需之外加壓力,可利用一片與待接合工件材質 具有擴散接合共容性的超塑性合金薄板夾於待接合工件之間。在這種情況下,由 於超塑性合金夾層在極低應力即可變形之超塑性現象以及微細晶粒之超塑性結 構,增加工件接合界面的接觸面積和原子擴散途徑,而可有效降低擴散接合製程 所需之外加壓力。 本實驗在不具超塑性材質的Ti-6A1-4V合金棒材之間,夾入具超塑性材質的 Ti-6A1-4V合金薄板。在溫度1200K、時間30分鐘,以及不同外加壓力(0.7,2.1, 4.2和7MPa)和不同表面製備(經80號,600號水砂紙研磨或0.3μm氧化鋁粉拋光)條 件下,實施擴散接合。藉由觀察接合界面以及測試抗拉強度和延伸率,評估接合 效果。結果顯示,在不具超塑性材質的Ti-6Al-4V合金棒材之間,夾入具超塑性材 質的Ti-6Al-4V合金夾層,即使在接合表面相當粗糙的情況下,以2.1MPa壓力亦可 獲得理想的接合效果,沒有超塑性夾層時,不具超塑性材質的Ti-6Al-4V合金棒材 只有在接台表面經拋光處理且壓力大於7MPa的條件下,才能達成擴散接合目的。 |
英文摘要 | In order to lower the external pressure needed for diffusion bonding, a thin super plastic alloy sheet with diffusion bonding compatibility may be inserted in between the work pieces to be bonded. In this case, this super plastic alloy interlayer can effectively reduce the amount of external pressure required for the diffusion bonding process because of its super plastic deformability under extremely low flow stress, and its fine granular super plastic structure, thereby increasing the contact area of the bonding surfaces and the atomic diffusion trails. In this experiment, a super plastic Ti-6Al-4V alloy sheet was inserted in between two non-super plastic Ti-6Al-4V alloy bars. Diffusion bonding was conducted at 1200K for 30mins. Various external pressures (0.7, 2.1, 4.2 and 7MPa) and surface preparations (grinding with 80, 600 grit SiC paper or polishing with AIzOs powder) were employed for this diffusion bonding process. The bonding interfaces were observed and the bonding strength and elongation were measured to evaluate the bonding effect. The results show that by inserting a super plastic Ti-6AI-4V interlayer the non-super plastic Ti-6Al-4V alloy bars can be satisfactorily bonded even under the lower pressure of 2.1MPa and with a pretty crude surface preparation. Without the super plastic interlayer, the materials can be diffusion bonded only under pressure higher than 7MPa and after the surface-polishing treatment. |
本系統中英文摘要資訊取自各篇刊載內容。