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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65319

    Title: 微量鋯與安定化退火對Al-4.7Mg-0.75Mn 合金腐蝕與機械性質之影響;Effect of minor Zr and stabilizing annealing on the corrosion and mechanical properties of Al-4.7Mg-0.75Mn alloys
    Authors: 郭品志;Kuo,Pin-Zhi
    Contributors: 材料科學與工程研究所
    Keywords: Al-4.7Mg-0.75Mn;安定化退火;微結構;機械性質;腐蝕性質;Al-4.7Mg-0.75Mn;stabilizing annealing;microstructure;mechanical properties;corrosion resistance
    Date: 2014-07-15
    Issue Date: 2014-10-15 15:06:05 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 藉由微結構觀察、ASTM G67硝酸腐蝕重量損失測試及機械性質測試(硬度、拉伸),探討微量鋯與安定化退火對Al-4.7Mg-0.75Mn (AA5383)合金腐蝕與機械性質之影響,結果顯示,不論是否含微量鋯之Al-4.7Mg-0.75Mn合金,於220℃下進行安定化退火熱處理,合金均會發生沿晶腐蝕敏感現象;但當安定化退火溫度升高至250℃時,雖然合金之機械強度會下降,但均無沿晶腐蝕敏感問題;且經250℃安定化退火之含鋯合金機械性質(UTS=348MPa、YS=254MPa、EL=12.0%)優於經220℃安定化退火之未含鋯合金(UTS=337MPa、YS=250MPa、EL=9.5%),也就是說藉由微量鋯的添加與適當的安定化熱處理,可以獲得兼具良好抗蝕能力與機械性質之Al-4.7Mg-0.75Mn合金。;Effect of minor zirconium addition and stabilizing annealing on the corrosion and mechanical properties of Al-4.7Mg-0.75Mn alloys were studied by analysing the microstructure, mechanical properties and the Nitric Acid Mass Loss Test (NAMLT). The results indicated that the intergranular corrosion (IGC) occurred no matter Al-4.7Mg-0.75Mn alloys contains zirconium or not after stabilizing annealing at 220℃. However, it is non-IGC if raising the stabilizing annealing temperature to 250℃. Furthermore, the alloy contains zirconium with a stabilizing annealing at 250℃ has better mechanical properties (UTS=348MPa, YS=254MPa, EL=12.0%) than the alloy without zirconium which stabilizing annealing at 220℃(UTS=337MPa, YS=250MPa, EL=9.5%). The Al-4.7Mg-0.75Mn alloy with minor zirconium addition as well as a suitable stabilizing annealing heat treatment have both excellent corrosion resistance and mechanical properties in the same time.
    Appears in Collections:[材料科學與工程研究所 ] 博碩士論文

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