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題 名 | 在3.5%鹽水中形成裂縫間氧化物對疲勞裂縫生長之影響=Crack Oxide Formation in 3.5% NaCl Solution and Its Influence on Fatigue Crack Growth |
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作 者 | 周漢興; 單秋成; 宋佩瑄; 許伯秋; 張力; | 書刊名 | 中正嶺學報 |
卷 期 | 28:1 1999.09[民88.09] |
頁 次 | 頁23-37 |
分類號 | 440.2 |
關鍵詞 | 氧化物導致裂縫閉合; 腐蝕疲勞; 裂縫生長遲滯; 剛性鍥形物模式; Oxide-induced crack closure; Corrosion fatigue; Crack growth retardation; Rigid-wedge model; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係探討4130合金鋼在3.5%鹽水中形成裂縫間氧化物,其厚度及分佈情形對於 空氣中或浸泡於鹽水中之疲勞裂縫成長速率之影響。實驗結果顯示,預浸泡時之液溫愈高, 裂縫開口愈大,形成氧化物厚度愈大,在空氣中疲勞測試時,裂縫生長速率遲滯最多,裂縫 閉合為其主因;在鹽水中進行疲勞測試時,氧化層會溶解及呈凝膠狀,使裂縫生長遲滯程度 較在空氣中測試時為低。利用Paris公式及剛性鍥形物模式,可預測氧化物導致裂縫閉合造 成之裂縫生長遲滯情形,發現預測值與實驗值趨勢相同。 |
英文摘要 | This research investigates the formation of oxide in cracks of a 4130 alloy steel in 3.5% NaCl solution, and the influence of oxide thickess and distribution on the fatigue crack growth rate in air and in the NaCl solution. The results of fatigue test in air show that as the crack opening and solution temperature increase, a greater oxide thickness is obtained, and therefore results in a stronger retardation of crack closure. The crack growth retardation phenomenon is less obvious when the specimens are tested in the NaCl solution. It is probably due to the oxide dissolution and its gelatinous morphology. The Paris law and rigid-wedge model, used for predicting the crack growth rates due to oxide-induced crack closure, provide a reasonable estimate as compared with experimental data. |
本系統中英文摘要資訊取自各篇刊載內容。