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姓名 李宗龢(Zong-He Li)  查詢紙本館藏   畢業系所 材料科學與工程研究所
論文名稱 微量Ni對Al-4.5Cu-0.3Mg-0.15Ti合金熱穩定性之影響
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摘要(中) 本研究之目的是探討微量鎳與熱處理對Al-4.5Cu-0.3Mg-0.15Ti(wt%)合金機械、磨耗與熱穩定性質之影響,結果顯示鑄態下微量鎳之合金於凝固過程中晶出(Al,Cu,Ni,Fe)之介金屬化合物。人工時效後,二合金均會析出Al2CuMg、Al2Cu,進而提升導電度和硬度,而添加鎳之合金雖會消耗合金中之強化元素,導致硬度上升趨勢較緩慢,但卻能使其熱穩定性顯著提升。
人工時效(150℃*48hr)後,未含鎳之合金擁有最高之抗拉強度,經磨耗後,雖磨損表面顆粒剝落顯著,但其基地愈保持完整。而含鎳之合金則具有低抗拉強度與最佳伸長量,經磨耗後,表面剝落嚴重且基地受損較顯著,導致未添加鎳之合金有較優的磨耗性質。
摘要(英) The purpose of this research was to investigate the influence of trace nickel and Heat Treatment on Al-4.5Cu-0.3Mg-0.15Ti (wt%) alloy mechanical, abrasion and thermal stability properties, the results show as cast alloy solidification trace nickel in CRYSTALLIZATION the (Al, Cu, Ni, Fe) of the intermetallic compound. After artificial aging, the two-alloy will precipitate Al2CuMg, Al2Cu, and thus enhance the conductivity and hardness, while adding nickel alloy, although the alloy will consume the strengthening elements, resulting in hardness rise more slowly, but it can make significant thermal stability promotion.
Artificial aging (150 ℃ * 48hr) after excluding nickel alloy has the highest tensile strength, after wear, though the wear surface of the particles flaking significant, but its base of more intact. The alloy containing nickel has a low tensile strength and the elongation of the best, after abrasion, flaking and severely damaged than the base significantly, resulting in nickel alloys have not added more excellent wear properties.
關鍵字(中) ★ 磨耗
★ 熱穩定
★ 機械性質
關鍵字(英) ★ Al-Cu-Ng
論文目次 Abstract I
總目錄 II
表目錄 IV
圖目錄 V
第一章 前言 1
第二章 文獻回顧 2
2.1鋁合金特性簡介 2
2.2鋁合金的強化 2
2.3 Al-Cu合金的析出強化 3
2.4 Al-Cu合金的析出行為 5
2.5 Al-Cu-Mg合金析出行為 6
2.6晶粒成長與異質顆粒 7
2.7晶粒徑對材料性質的影響 8
2.8磨耗 9
第三章 實驗步驟與方法 12
3.1材料熔配方法 12
3.2均質化處理 14
3.3熱處理 14
3.4微結構觀察與分析 15
3.4.1光學顯微鏡(Optical Microscopy) 15
3.4.2導電度(%IACS)量測 15
3.4.3掃描式電子顯微鏡(Scanning Electron Microscopy) 16
3.5機械性質分析 16
3.5.1硬度試驗(Hardness, HRF) 16
3.5.2拉伸試驗(Tensile Test) 16
3.5.3磨耗試驗(Wear test) 17
第四章 結果與討論 19
4.1微結構分析 19
4.1.1光學顯微鏡觀察 19
4.1.2導電度之量測 20
4.2機械性質分析 22
4.2.1硬度試驗 22
4.2.2拉伸試驗 30
4.2.3磨耗試驗 33
第五章 結論 35
第六章 參考文獻 36
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指導教授 李勝隆(Sheng-Long Lee) 審核日期 2016-7-22
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