The localized deformation behavior during tensile straining (0 to 9 pct) and its effect on the corrosion properties of two third-generation Al-Li alloys (2099 and 2196) were investigated. Both electron backscatter diffraction and 2D micro-digital image correlation were used to examine site-specific effects of orientation and microstrain evolution during tensile straining. After straining, in situ tapping mode atomic force microscopy was used to study galvanic corrosion as it occurred in artificial seawater (3.5 pct NaCl). Regions of high microstrain corroded preferentially, and large, recrystallized grains in mostly unrecrystallized microstructures were highly detrimental to corrosion properties. Recommendations for improved thermomechanical processing and/or alloying to promote corrosion resistance of 2XXX series Al-Li alloys were considered.

中文翻译：

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拉伸应变对微应变演变的影响对铝锂合金2099和2196的局部腐蚀的影响

研究了拉伸应变（0至9 pct）期间的局部变形行为及其对两种第三代Al-Li合金（2099和2196）的腐蚀性能的影响。电子背散射衍射和2D微数字图像相关性均用于检查拉伸应变过程中取向和微应变演变的特定位置效应。拉紧后原位攻丝模式原子力显微镜用于研究在人造海水（3.5 pct NaCl）中发生的电偶腐蚀。高微应变区优先腐蚀，大部分未结晶的显微组织中的大的再结晶晶粒对腐蚀性能有很大的损害。考虑了有关改进热机械加工和/或合金化以提高2XXX系列Al-Li合金耐腐蚀性的建议。