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Influence of Milling Parameters on Mechanical Properties of AA7075 Aluminum under Corrosion Conditions

机译:腐蚀条件下铣削参数对AA7075铝力学性能的影响

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摘要

The paper describes an experimental study developed on the AA7075 T651, which is an aluminum alloy extensively used in the aeronautical industry. This work presents a double approach of investigation where there is no literature about previous research. This includes the analysis of the results obtained by the combination of mechanical and chemical actions on the mechanical properties of this material. On the one hand, the combinations of relevant milling parameters (feed rate, cutting speed) on flat samples (flat specimens have been selected by attempting to reproduce with the most accurate way the geometry and the type of machining process known as face milling is usually used in this manufacturing field). On the other hand, the stimulating effect of the corrosion by salt spray on selected batches of specimens was machined in the previous stage. Results from tensile tests performed on the whole of specimens allowed us to evaluate how the main mechanical properties (yield strength, tensile strength, and elongation at break) have been affected by the processes applied. Elongation at the break presents a reduction in an inverse order to feed a rate increase (up to 24.5%) and this reduction is extended (additional 19.17%) in specimens under corrosion conditions, which results in a greater fragility of the material.
机译:本文描述了在AA7075 T651上开发的实验研究,AA7075 T651是一种广泛用于航空工业的铝合金。这项工作提出了一种双重调查方法,没有关于先前研究的文献。这包括对通过机械和化学作用对这种材料的机械性能进行组合而获得的结果的分析。一方面,通过尝试以最精确的方式重现通常被称为端面铣削的几何形状和类型的加工过程,来选择平面样品(平面试样)上相关铣削参数(进给速度,切削速度)的组合。在该制造领域中使用)。另一方面,在前一阶段加工了盐雾对选定批次样品的腐蚀刺激作用。对整个样品进行的拉伸测试结果使我们能够评估所应用的工艺如何影响主要机械性能(屈服强度,拉伸强度和断裂伸长率)。断裂时的伸长率呈倒序减小,从而使进给率增加(最多达24.5%),并且在腐蚀条件下,试样的这种减小率得到扩展(增加19.17%),这导致材料的脆性更大。

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