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首页> 外文期刊>Materials Science and Engineering >Microstructure and mechanical properties relation in cold rolled Al 2024 alloy determined by X-ray line profile analysis
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Microstructure and mechanical properties relation in cold rolled Al 2024 alloy determined by X-ray line profile analysis

机译：X射线线轮廓分析确定冷轧Al 2024合金的组织与力学性能关系

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摘要

Solution treated aluminum 2024 alloy sheets were subjected to rolling at room and cryogenic temperatures. Aging time and mechanical properties were evaluated by microhardness measurements and tensile test, respectively. Microstructural parameters were assessed by applying modified Williamson-Hall and modified Warren-Averbach methods to the X-ray diffraction patterns. Interestingly, the mechanical behavior of the different as-rolled and post-roll aged samples was in correlation with the sub-grain sizes and dislocation densities. The sub-grain sizes of the as-rolled samples were smaller than 40 nm, and the dislocation densities were larger than 7.7 × 10~(15) m~(-2), which is related to the high strength of the as-rolled samples. After aging treatment, the ductility of the rolled samples increased significantly, this was justified by the decline in the dislocation density.
机译：在室温和低温下对固溶处理的2024铝合金板进行轧制。通过显微硬度测量和拉伸试验分别评估了老化时间和机械性能。通过将改进的Williamson-Hall方法和改进的Warren-Averbach方法应用于X射线衍射图来评估微结构参数。有趣的是，不同的轧制和轧制后时效样品的机械性能与亚晶粒尺寸和位错密度相关。轧制后样品的亚晶尺寸小于40 nm，位错密度大于7.7×10〜（15）m〜（-2），这与轧制后的高强度有关。样品。经过时效处理后，轧制样品的延展性显着提高，这是由于位错密度降低而证明的。

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