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Student Number 87323001
Author Guo-Yu Gou(高國瑜)
Author's Email Address No Public.
Statistics This thesis had been viewed 2242 times. Download 10 times.
Department Mechanical Engineering
Year 1999
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title none
Date of Defense 2000-06-28
Page Count 85
Keyword
  • 6000
  • aging
  • Al-Mg-Si
  • EXTRUSION
  • Abstract First, precipitation behaviors of AA6063 (Al-0.72Mg-0.42Si) during pre-aging and the age-hardening after artificial aging were analyzed by using differential scanning calorimetry (DSC) and by measuring the resistivity, and confirmed by microstructure observation using transmission electron microscope (TEM). The tensile test was performed to obtain the mechanical properties of the alloys.
    The results indicate that G.P.zones (II) of 6063 alloy is formed at 40 ~ 70℃ of pre-aging temperature and has no influence on age-harding after artificial aging, even in a long period. Increasing either the temperature or holding period of pre-aging will significantly increase the strength after artificial aging.
    Second, the hot defotmation of AA6063 Al alloys has been related to chemical compositions, and the extrusion parameters including reheating temperature, container temperature, and extrusion rate. The extrudability was investigated using Gleeble compression test and the results were in good agreement with the actual extrusion test. The precipitation properties during extrusion were also measured using differential scanning calorimetry (DSC), and the microstructure observations were performed using and transmission electrion microscope (TEM).
    The results indicate that higher extrusion temperature can obtain better extrudability. However, matreials with excess Mg, Si, and Fe elements will reduce extrudability. And the maximum extrusion pressure in Mg-excess material was greater than that in Si-excess material. In another hand, a small addition of Mn sifnificantly accelerates the homogenising process (transfoemation of the brittle platelike β-AlFeSi phase to the more rounded α-AlFeSi phase) which results in superior hot formabilitu and ductility.
    Table of Content 謝誌Ⅰ
    AbstractⅡ
    摘要Ⅳ
    目錄Ⅴ
    表目Ⅷ
    圖目Ⅸ
    第一章 緒論1
    一、序言1
    二、理論基礎與論文回顧2
    2-1 Al-Mg-Si簡介2
    2-2 Al-Mg-Si合金之析出強化熱處理3
    2-3 Al-Mg-Si合金的時效硬化過程4
    2-3-1 Al-Mg-Si合金的時效析出序列與機構4
    2-3-2 Al-Mg-Si合金的兩段時效5
    2-3-3 析出強化機構7
    2-4 擠製條件對熱成形性之影響8
    2-4-1 合金元素之影響8
    2-4-2 擠製溫度之影響9
    第二章 本文11
    一、前言11
    二、實驗步驟與方法13
    2-1 材料13
    2-2 不同預時效條件對人工時效時析出舉動之影響13
    2-2-1 熱處理13
    2-2-2 微差掃描熱分析
    (Differential Scanning Calotimetry, DSC)14
    2-2-3 拉伸試驗(Tensile Test)15
    2-2-4 穿透式電子顯微鏡觀察(TEM)15
    2-2-5 電阻值測試16
    2-3 6063鋁合金之熱變形抵抗研究17
    2-3-1 擠型製程17
    2-3-2 突破壓力(Breakout Pressure)量測18
    2-3-3 微差掃描熱分析
    (Differential Scanning Calorimetry, DSC)18
    2-3-4 拉伸試驗(Tensile Test)18
    2-3-5 Gleeble壓縮試驗18
    2-3-6 金相觀察19
    2-3-7 穿透式電子顯微鏡觀察(TEM)
    及成份分析(EDAX)19
    三、結果與討論20
    3-1 6063鋁合金經不同預時效條件對人工時效時
    析出舉動之影響20
    3-1-1 DSC量測的結果20
    3-1-2 電阻量測的結果22
    3-1-3 穿透式電子顯微鏡觀察的結果22
    3-1-4 拉伸試驗的結果23
    3-2 6063鋁合金之熱變形抵抗研究24
    3-2-1 DSC量測的結果25
    3-2-2 突破壓力(Breakout Pressure)量測26
    3-2-3 拉伸試驗的結果27
    3-2-4 電子顯微鏡觀察的結果27
    3-2-5 合金配置對6063鋁合金熱變形抵抗的影響28
    3-2-5.1 擠型性的調查結果28
    3-2-5.2 Mn含量及均質化處理對6063鋁合金中
    晶出相之影響29
    四、結論31
    五、參考文獻33
    表37
    圖39
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    [3] Mahoto Takeda, Fumiyoshi Ohkubo, Tomohisa Shirai, Kouichiro Fukui, “Precipitation behaviour of Al-Mg-Si ternary alloys”, Materials Science Forum, vol.217-222, pp.815-820, 1996
    [4] D.Apelian, S.Shivkumar, G.Sigworth, ” Fundamental Aspects of Heat Treatment of Cast Al-Si-Mg Alloys”, AFS Transactions, pp.727-741
    [5] D.W.Pashley, M.H.Jacobs, J.T.Vietz, ”The Basci Processes Affecting Two-step Aging in an Al-Mg-Si Alloy”, Philosophical Magazine, vol.16, pp. 51-76, 1967
    [6] G.Thomas, ”The Aging Characteristics of Aluminium Alloys”, Journal of the Institute of Metals, vol.90, pp.57-63, 1961
    [7] 菅野幹宏, 鈴木壽, ”Transmission electron micrographs caused by some unfavorble factors in aluminum base alloys”, 輕金屬, vol.30, no.11, pp.653-663, 1980
    [8] Bin-Lung Ou, Yoshikazu Tsuzuki, Kunihiko kishino, Katsutoshi Sasaki, Hajime Watanabe, ”Age-Hardenability of a 6000-Series(Al-Mg-Si)Alloy”, Furukawa Review, no.14, pp.157-162, 1995
    [9] Toshiya Hirata, Shigeru Matsuo, Trans JIM, vol.13, pp.231, 1972
    [10] M. H. Mulazimoglu, R. A. L. Drew, J. E. Gruzelski, Journal of materials science letters, vol.8, pp.297, 1989
    [11] R. C. Dorward, Metallurgical Transactions, vol.4, pp.507, 1973
    [12] Yoshio Baba, Akira Takashima, “Influence of Composition on the Two-Stage Aging of Al-Mg-Si Alloys”, Trans JIM, vol.10, pp.196-204, 1969
    [12] Yoshio Baba, Akira Takashima, “Influence of Composition on the Two-Stage Aging of Al-Mg-Si Alloys”, Trans JIM, vol.10, pp.196-204, 1969
    [14] W.Lorimer and R.B.Nicholsin; Acta Metallurgica, vol.14, pp.1009,1966
    [15] C. Panseri, T. Federighi, Journal of the institute of metals, vol.94, pp.99, 1966
    [16] 鈴木壽, 菅野幹宏, 伊藤吾朗, 日本輕金屬, vol.30, pp.609, 1980
    [17] I. Kovacs, J. Lendvai, E. Nagy, Acta Metallurgica, vol.20, pp.975, 1972
    [18] Robert E. Reed-Hill; Physical Metallurgy Priciples, 3rd ed. pp.532, 1991
    [19] N.C.Parson,H.L.Yiu,”The Effect of Heat Treatment on The Microstructure and Properies of 6000 Series Alloy Extrusion Ingots ”,The Minerals &Materials Society,pp713~724,1988
    [20]日本輕金屬學會委員,”鋁合金之組織與性質”,日本輕金屬學會, pp.289, 1991
    [21] H. J. Lamb: in Proc. Conf. on “Phase transformations”, Series 3, Lodon, The Institution of Metallurgists. No.11, vol.2, V4-V5, 1979
    [22] H. W. PHILLIPS: “Annotated equilibrium diagrams of some aluminum alloy systems”, Monograph and Report Series, London, The Institute of Matals. No.25, 1959
    [23] S.Zajac, B.Hutchinson, A.Johansson, L.-O,Gullman, Materials Science and Technology, vol.10, pp.323-333, April 1994
    [24] S.Onurlu, A.Tekin, Journal of materials science vol.29, pp.1652-1655, 1994
    [25] J. Langerweger; Aluminum Technology 1980,pp.216~pp.222, 1980
    [25] J. Langerweger; Aluminum Technology 1980,pp.216~pp.222, 1980
    [27] Dr. A. J.(Bill) Bryant, Roger A. P. Fielding, “Developments in Billet and Extrusion Metallurgy on the Operation of the Extrusion Process”, Light Metal Age., pp.6-34, April 1998
    [28] M.M. FARAG,M.H. AHMED, “Effective Extrusion Ratio in Hot Extrusion of Non-Circular Aluminium Shapes” , Materials Science and Engineering.,17,pp131-137,1975
    [29] 歐炳隆,劉維人,碩士論文”低溫預時效對人工時效時析出舉動之影響”,1999
    [30] J. W. Edington, “The Operation and calibration of the electron microscope” , vol.1~5, 1985
    [31] J. W. Edington, “Practical electron microscopy in materials science” , vol.1~5, 1985
    Advisor
  • Bin-Lung Ou(歐炳隆)
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    Date of Submission 2000-06-28

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