研究生: |
李岳倫 Yueh-Lun Lee |
---|---|
論文名稱: |
鋁鋅系列鎂合金銲接性之研究 The Investigation on the Weldability of Al-Zn Magnesium alloys |
指導教授: |
田振榮
Tien, Chen-Jung 周長彬 Chou, Chang-Pin |
學位類別: |
碩士 Master |
系所名稱: |
工業教育學系 Department of Industrial Education |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 127 |
中文關鍵詞: | 鋁鋅系列鎂合金 、銲接性 、異種接合 |
英文關鍵詞: | Al-Zn magnesium alloy, weldability, dissimilar joint |
論文種類: | 學術論文 |
相關次數: | 點閱:185 下載:13 |
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摘要
本論文主旨在探討GTAW銲接參數對鋁鋅系列鎂合金銲接性之影響,實驗方法採用不添加填料之情況下,針對AZ31及AZ80鎂合金進行對接銲與異種鎂合金(AZ31-AZ80)接合。本研究範圍包括銲道型態、顯微組織及機械性質之分析。
研究結果發現,AZ31及AZ80鎂合金以GTAW對接銲時,其銲道寬度係隨著熱輸入量增加而增加;銲道深寬比亦隨著熱輸入量之增加而有增加之趨勢,其中以AZ80鎂合金之銲道寬度均較寬於AZ31鎂合金。
顯微組織觀察結果發現,銲道晶粒尺寸係隨著熱輸入量的增加而有增加的趨勢;在晶界析出之第二相則隨著熱輸入量之增加而有降低之趨勢。
機械性質試驗包括微硬度試驗與拉伸試驗,研究結果顯示,銲件之機械強度係隨著熱輸入量之增加而降低,其中AZ80鎂合金銲後之機械性質均優於AZ31鎂合金與異種鎂合金銲件;且三種銲件之拉伸破斷面皆屬於脆性破壞型式。
關鍵詞:鋁鋅系列鎂合金、銲接性、異種接合
Abstract
The study to investigate the effect of welding parameters on the weldability of AZ magnesium alloys . A butt welding without filler metal of AZ31, AZ80 and dissimilar matel (AZ31-AZ80) joint by GTAW. It includes three parts. The first part was the semblance of weld, the second part was the microstructure observation, the third part was the mechanical properties of weldment.
From the result of Mg alloys by GTAW, the weld width and aspect ratio both increase with increasing input energy. Especially, the weld width were wider in AZ80 than AZ31 Mg alloy.
From the microstructure observation, the formation of larger grain with increasing input energy. However, the number of secondary phase increases with decreasing input energy.
Mechanical tests includes microhandness tests and tensile tests, the study results indicate that the mechanical properties of weldment decreases with increasing input energy. From the results of mechanical tests, the mechanical strength of AZ80 were higher than AZ31and dissimilar joint weldment. The brittle fracture surface was observed in all tensile tested specimens.
Keywords: Al-Zn magnesium alloy, wldability, dissimilar joint.
參考文獻
ASM. (1976). Metals handbook: Magnesium alloys (Vol.8, 8th ed.)(pp.314-319).
ASM. (1975). Metals handbook: Heat treating of magnesium (Vol.4, 9th ed.)( pp.309-310).
ASM. (1971). Solidification ( pp.132-134).
Asahina, T., & Tokisue, H. (1995). Some characteristics of TIG welded joints of AZ31 magnesium alloy. The Japan Institute of Light Metals, 45(2), pp.70-75.
Cerri, E., Cabibbo, M., & Evangelista, E. (2002). Microstructural evolution during high-temperature exposure in a thixocast magnesium alloy. Materials Science and Engineering, A333, pp. 208-217.
Cary, H. B.(1998). Modern Welding Technology(3rd ed). Englewood Cliff, New Jersey, Prentice-Hall Inc.
Cary, H. B. (1989). Modern welding technology (2th ed.)( pp.526-527).
Dynacast International Limited. (2001). Conventional diecasting process. Retrieved July 19, 2004, from database on the World Wide Web: http://www.dynacast.com/die-casting/conventional.html
Dube, D., Fiset, M., Couture, A., & Nakatsugawa, I. (2001). Characterization and performance of laser melted AZ91D and AM60B. Materials Science and Engineering, A299, pp.38-45.
Eliezer, D., Uzan, P., & Aghion, E. (2003).Effect of second phases on the corrosion behaviour of magnesium alloys. Materials Science Forum, Vol.419-422, pp.857-866.
Hallstedt, B.(1992). Thermodynamic assessment of the system MgO-Al2O3. J. Am. Ceram. Soc., p.75.
Lee, W. B., Yeon, Y. M., & Jung, S. B. (2003).Joint properties of friction stir welded AZ31B-H24 magnesium alloy. Materials Science and Technology, Vol.19, pp.785-790.
Liu, L. M., Wang, J. F., & Song, G. (2004). Hybrid laser-TIG welding , laser beam welding and gas tungsten arc welding of AZ31B magnesium alloy. Materials Science and Engineering, A 381, pp.129-133.
Liu, L. M., Song, G., Liang, G. L., & Wang, J. F. (in press). Pore formation during hybrid laser – tungsten inert gas welding of magnesium alloy AZ31B-Mechanism and remedy. Materials Science and Engineering.
Massalski, T. B., Okamoto, H., Subramanian, P. R., & Kacprzak, L.(1990). Binary alloy phase diagrams (p.170).
Mclean, A. A., Powell, G. L. F., Brown, I. H., & Linton, V. M. (2003). Friction stir welding of magnesium alloy AZ31B to aluminium alloy 5083. Science and Technology of Welding and Joining, Vol.8, No.6, pp.462-464.
Marya, M., & Edwards, G. R.(2002). Chloride contributions in flux-assisted GTA welding of magnesium alloys. Welding Journal, pp.291-298.
Munitz, A., Cotler, C., Stern, A., & Kohn, G. (2001). Mechanical properties and microstructure of gas tungsten arc welded magnesium AZ91D plates. Materials Science and Engineering, A302, pp.68-73.
Majumdar, J. D., Galun, R., Mordike, B. L., & Manna, I. (2003). Effect of laser surface melting on corrosion and wear resistance of a commercial magnesium alloy. Materials Science and Engineering, A361, pp.119-129.
Park, S. H. C., Sato, Y. S., & Kokawa, H.(2003). Effect of micro-texture on fracture location in friction stir weld of Mg alloy AZ61 during tensile test. Scripta Materialia, 49, pp.161-166.
Pan, L. K., Wang, C. C., Hsiao, Y. C., & Ho, K. C. (2004). Optimization of Nd:YAG laser welding onto magnesium alloy via taguchi analysis. Optics and Laser Technology, 37, pp.33-42.
Shaw, C., & Jones, H. (1997). The contributions of different alloying additions to hardening in rapidly solidified magnesium alloys, Materials Science and Engineering, A226-228, pp.856-860.
Sun, Z., Pan, D., & Wei, J. (2002). Comparative evaluation of tungsten insert gas and laser welding of AZ31 magnesium alloy [Abstract]. Singapore Institute of Manufacturing Technology.
Sato, Y. S., Park, S. H. C., Michiuchi, M., & Kokawa, H.(2004). Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys. Scripta Materialia, 50, pp.1233-1236.
William, R. O.(1996). Welding handbook-materials and applications part1 (Vol.3, 8th ed.)( p.124). Miami: American Welding Society.
Wang, Y. H., Wang, Q. D., Ma, C. J., Ding, W. J., & Zhu, Y. P. (2003). Effects of Zn and RE additions on the solidification behaviour of Mg - 9Al magnesium alloy. Materials Science and Engineering, A342, pp.178-182.
Weisheit, A., Galun, R., & Mordike, B. L. (1998). CO2 laser beam welding of magnesium – based alloys. Welding Journal, Vol.77, No.4, pp.149-154.
Zhao, H., & Roy, T. D. (2001). Pore formation during laser beam welding of die – cast magnesium alloy AM60B-mechanism and remedy. Welding Journal, pp.204-210.
中國鎂協會(民93)。鎂合金統計數據。中國鎂業網。民國93年7月9 日, 取自: http://www.chinamagnesium.org/
邱垂泓(民92)。鎂合金之熱處理。工業材料雜誌,第198期,頁173-174。
周俊宏(民90年6月20日)。3C用鎂合金市場趨勢。金屬工業研究發展中心。民國93年7月19日,取自: http://www.itis.org.tw
周長彬、蔡丕椿、郭央諶(民86)。銲接學(初版),頁65。台北:全華。
敖仲寧(民89)。雷射銲接研究。國際銲接學會亞洲太平洋國際學術會議,頁227。
張印本、楊良太、嚴世明(民90)。ASTM金屬材料規格與對照(初版),頁463-466。台北:全華。
陳家暘、邱昭奮、陳盈志、廖芳俊(民92)。鎂鋁鋅系鎂合金銲補製程的探討。鎂合金產業通訊,第20期,頁154-160。
黃義順、王星豪(民92)。鎂及鎂合金之基本特性與銲接性。銲接與切割,第13卷第3期,頁33-42。
曾義豐(民90)。Pulsed laser welding of magnesium alloy AZ31B。行政院國家科學委員會補助擬題研究成果報告,NSC 89-2212-E-182-002。
葉哲政(民91)。鎂合金汽車零組件產品應用現況與趨勢。機械工業雜誌,第259期,頁104。
葉信宏、工正全、周雅靜、陳易聰、呂秀文(民93)。鎂合金表面處理製廢料回收再利用。永續產業發展雙月刊,第13期,頁57-62。
鄭國雄、林樹均、李勝隆、鄭晃忠、葉均蔚(民89)。工程材料學(二版),頁284-292。台北:全華。
鎌土重晴、小島陽野(民88)。金屬熱處理:鎂合金之熱處理(陳永璋譯),頁72-73。