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題 名 | 鐵基形狀記憶合金化學腐蝕與應力腐蝕之研究=A Study on the Chemical Corrosion and Stress Corrosion of Fe-based Shape Memory Alloys |
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作 者 | 歐陽自明; 林昆明; 林新智; 周棟勝; 柯宏達; | 書刊名 | 材料科學與工程 |
卷 期 | 32:1 2000.03[民89.03] |
頁 次 | 頁25-29 |
分類號 | 440.39 |
關鍵詞 | 鐵基形狀記憶合金; 化學腐蝕; 應力腐蝕; Fe-based shape memory alloy; Chemical corrosion; Stress corrosion; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究利用真空感應熔煉法,配製Fe64Mn30Si6(33號)、Fe59Mn30Si6Cr5(34號)及Fe65Mn13Si5Ni5(35號)三種形狀記憶合金,並施以滾軋處理,而後進行形狀記憶效應量測,並以化學浸蝕及應力腐蝕斷裂試驗,探討三種合金之抗蝕性。實驗結果顯示,35號合金雖然添加Cr及Ni,可提高γ母相的c/a比值,但因α麻田散相之存在,導致形狀記憶效應為最差。在3.5%NaCl靜滯溶液之浸蝕試驗中,35號合金抗蝕性相當良好,並與304不鏽鋼相當,34號合金會造成局部腐蝕,33號合金之腐蝕產物會附著於基材,形成暫時性鈍化現象。在飽和硫化氫的應力腐蝕斷裂試驗中,35號合金因層狀α麻田散相易於腐蝕,導致成為活性溶解路徑,在該腐蝕環境下造成抗拉強度明顯下降,而33號及34號合金的抗拉強度降幅則相對較小。 |
英文摘要 | Fe64Mn30Si6, Fe59Mn30Si6Cr5 and Fe65Mn13Si5Ni5 were prepared by VIM technique. The measurement of the shape memory effect and the tests of the chemical corrosion and stress corrosion cracking of the alloys were conducted. It is found that Fe65Mn13Si5Ni5 has the worst shape memory effect due to the presence of the α martensite. In 3.5% NaCl solution, Fe65Mn13Si5Ni5 has the best chemical corrosion resistance in the three alloys equivalent to that of 304 stainless steel. A local corrosion takes place in Fe65Mn13Si5Ni5, which will accelerate the corrosion rate of the alloy. The corrosion product of Fe64Mn30Si6 is adhered tightly on the based material, acting a temporary passive layer to protect the base material from chemical attack. In the stress corrosion cracking test, Fe65Mn13Si5Ni5 has the highest fracture stress in the atmosphere in the three alloys, but due to the existence of the α materensite acting a role as active path in saturated H2S solution, it causes the largest decrease in the fracture stress in the three alloys. |
本系統中英文摘要資訊取自各篇刊載內容。