| DC 欄位 |
值 |
語言 |
| DC.contributor | 機械工程學系在職專班 | zh_TW |
| DC.creator | 劉佳蓉 | zh_TW |
| DC.creator | CHIA-JUNG LIU | en_US |
| dc.date.accessioned | 2018-11-27T07:39:07Z | |
| dc.date.available | 2018-11-27T07:39:07Z | |
| dc.date.issued | 2018 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=105353018 | |
| dc.contributor.department | 機械工程學系在職專班 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本研究係探討B535.0(Al-7Mg) 鑄造合金改良成鋁鎂合金鍛件之可能性，再尋找該鍛造合金(暫命名為MB5350合金)之最佳安定化條件，並藉由非破壞性檢測技術(導電度量測)探討敏化對MB5350(Al-7Mg)鍛造合金之腐蝕與機械性質影響的關連性; 結果顯示，MB5350(Al-7Mg)鍛造合金較理想的安定化條件是280 ℃,1h，其結構為回復及極輕微的再結晶。合金經敏化處理後，隨敏化時間增加，其β相(Mg2Al3)析出量也逐漸上升，使導電度值增加，然其重量損失測試(依規範ASTM-G67)值具有輕微沿晶腐蝕敏感性之隱憂，對於如此高Mg合金而言屬輕微，故可論定280 ℃,1h為MB5350 (Al-7Mg)合金最佳安定化條件。另外，敏化過程對MB5350 (Al-7Mg)合金性質(抗腐蝕性與硬度)的影響，可藉由非破壞性檢測技術（導電度）作有效評估，其誤差率能控制在12 %以內。 | zh_TW |
| dc.description.abstract | This research discusses potential methods of improving the properties of casting alloy B535.0 (Al-7Mg) and further explored the optimal conditions for stabilizing treatment for a new alloy named MB5350 (Al-7Mg). Though non-destructive analytical testing techniques such as conductivity test, we further studied the corrosion and mechanical properties of MB5350 (Al-7Mg) alloy in response to sensitization reaction. The result of research indicated that the forging alloy of MB5350 (Al-7Mg) can get the better stability condition under the annealing process for 280 ℃, 1H. Recovery and partial recrystallized structure was found by microstructure under this condition. Furthermore, the sensitization time can cause β-phase (Mg2Al3) precipitation amount increased, and the trend of electrical conductivity show consistent as well. Yet, after ASTM G67 standard test still showed slight potential intergranular corrosion. As a result, we conclude that 280 ℃,1h is the optimal stabilization condition for MB5350 (Al-7Mg). Besides, the influence of the sensitization process for the mechanical property (Corrosion Resistance and Hardness) of MB5350 (Al-7Mg) can be effectively evaluated by the Non-Destructive Testing (Conductivity Measurement) which deviation can control within 12 %. | en_US |
| DC.subject | 鋁鎂合金 | zh_TW |
| DC.subject | 非破壞檢測 | zh_TW |
| DC.subject | 敏化 | zh_TW |
| DC.subject | 沿晶腐蝕 | zh_TW |
| DC.subject | β相 | zh_TW |
| DC.subject | 導電度 | zh_TW |
| DC.title | 非破壞性探討安定化熱處理對Al-7Mg鍛造合金微結構、機械與腐蝕性質之影響 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Non-destructive test technology on effect of stabilization on microstructures, mechanical properties and corrosion resistance of Al-7Mg forged-alloy | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |