Prior corrosion and fatigue of 2024-T3 aluminum alloy
Prior corrosion and fatigue of 2024-T3 aluminum alloy
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DOI：
10.1016/j.corsci.2005.11.008
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发表时间：
2006-10-01
影响因子：
8.3
通讯作者：
Hoeppner, David W.
中科院分区：
文献类型：
--
作者：
Jones, Kimberli;Hoeppner, David W.
对两种厚度的2024-T3铝合金进行了点蚀-裂纹转变实验。在疲劳加载之前，使用比例为15：1的3.5%氯化钠溶液和过氧化氢腐蚀试样。裂纹起源于腐蚀坑进行了目视检查，使用各种显微镜技术，以深入了解坑到裂纹的过渡过程。在这项研究中，所有预腐蚀试样从与点蚀相关的裂纹断裂。利用数字视频技术成功地观察到了坑-裂纹转变。与2024-T3-1.600 mm样本相比，腐蚀更严重的2024-T3-4.064 mm样本的整体疲劳寿命降低更多。结果表明，数量，如坑表面积和周围的坑接近坑的深度一样重要，在确定何时何地将形成裂纹。(c)2005爱思唯尔有限公司保留所有权利。
Pit-to-crack transition experiments were conducted on two thicknesses of 2024-T3 aluminum alloy. Specimens were corroded using a 15:1 ratio of 3.5% sodium chloride solution and hydrogen peroxide prior to fatigue loading. Cracks originating from corrosion pits were visually investigated using various microscopy techniques in order to gain insight into the pit-to-crack transition process.All pre-corroded specimens in this study fractured from cracks associated with pitting. Pit-to-crack transition was successfully observed using digital video techniques. The more aggressively corroded 2024-T3-4.064 mm specimens experienced more of an overall fatigue life reduction than 2024-T3-1.600 mm specimens. Results indicated that quantities such as pit surface area and surrounding pit proximity are as important as pit depth in determining when and where a crack will form. (c) 2005 Elsevier Ltd. All rights reserved.