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首页> 外文期刊>Materials Science and Engineering >Effect of friction stir process parameters on the mechanical properties of 5005-H34 and 7075-T651 aluminium alloys
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Effect of friction stir process parameters on the mechanical properties of 5005-H34 and 7075-T651 aluminium alloys

机译：搅拌摩擦工艺参数对5005-H34和7075-T651铝合金力学性能的影响

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摘要

The properties and microstructure of friction stir processed AA 7075-T651 (Al-Zn-Mg-Cu) Aluminium alloy were studied using various tool designs. Trials were conducted on AA 5005-H34 with the aim of determining the most suitable FSP tool design out of the considered three different pin designs. Fully recrystallised fine microstructure and a defect free processed zone was achieved through the use of some of the FSP pin designs.For FSP 5005-H34 aluminium alloy substantial grain refinement was detected. The initial 192 pm pancake-like microstructure in the AA 5005-H34 base material was refined to 10-20 mu m in the processed regions. Similarly, the grain size of around 50 mu m in the base material was decreased to 4-10 mu m in the processed regions of the FSP of 7075-T651 aluminium alloy.The traverse speed has a greater influence on the microhardness and mechanical properties, compared to the tool rotational speed. Microhardness and mechanical properties were improved as the traverse speed increased, due to the reduction in the precipitate-free zones at the grain boundaries.
机译：使用各种工具设计研究了搅拌摩擦加工的AA 7075-T651（Al-Zn-Mg-Cu）铝合金的性能和显微组织。在AA 5005-H34上进行了试验，目的是从考虑的三种不同的销钉设计中确定最合适的FSP工具设计。通过使用某些FSP销设计，可以实现完全重结晶的精细组织和无缺陷的加工区。对于FSP 5005-H34铝合金，可以检测到明显的晶粒细化。在加工区域中，AA 5005-H34基础材料中最初的192 pm煎饼状微观结构被细化为10-20微米。同样，在7075-T651铝合金的FSP加工区域中，基体材料的晶粒尺寸从50微米左右减小到4-10微米。横移速度对显微硬度和机械性能的影响更大，与工具转速相比。随着横移速度的增加，显微硬度和机械性能得到改善，这归因于晶界处无沉淀区的减少。

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