Mechanical and tribological properties of 5A06 aluminum alloy at low temperature
Mechanical and tribological properties of 5A06 aluminum alloy at low temperature
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DOI：
10.1088/2051-672x/acb72c
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
Tao Ye;Z. Jia;Jianwei Ma;Wu Yu;Jia-sen Wang;Lianzhong Zhang;Xue-bao Tian;Shuangqing Wang
中科院分区：
文献类型：
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作者：
Tao Ye;Z. Jia;Jianwei Ma;Wu Yu;Jia-sen Wang;Lianzhong Zhang;Xue-bao Tian;Shuangqing Wang
5A06铝合金在较宽温度范围内的力学和摩擦学性能存在显着差异，迄今为止相关研究受到的关注非常有限。本文通过低至77K温度的拉伸试验获得了5A06铝合金的力学性能，为其摩擦学性能分析奠定了基础。然后，在球盘摩擦试验机上进行干式线性往复滑动磨损试验，探讨5A06铝合金在低温（173K）到室温（293K）不同温度下的摩擦行为和磨损机制。最后，通过光学3D测量系统和配备能量色散光谱仪的扫描电子显微镜对磨损表面的磨损形貌和化学成分进行了表征。结果表明，环境温度通过改变5A06铝合金的力学性能和摩擦热耗散来影响其摩擦学性能。与293K相比，173K时摩擦系数降低14.66%，磨损率降低70.79%。 5A06铝合金的主要磨损机制在293K和273K时为分层磨损和氧化磨损，在223K和173K时为磨粒磨损、粘着磨损和氧化磨损的组合。
There are significant differences in the mechanical and tribological properties of 5A06 aluminum alloys subjected to a wide temperature range, and the related research has received very limited attention so far. In this paper, the mechanical properties of 5A06 aluminum alloy were obtained by tensile test at temperature as low as 77K, which laid a foundation for analyzing its tribological properties. Then, dry linear reciprocating sliding wear tests were performed on a ball-on-disc tribometer to explore the friction behavior and wear mechanism of 5A06 aluminum alloy at different temperatures from low temperature (173K) to room temperature (293K). Finally, the wear morphology and chemical composition of the worn surface were characterized by an optical 3D measurement system and a scanning electron microscope equipped with an energy dispersive spectroscopy. The results indicate that the ambient temperature affects the tribological properties of 5A06 aluminum alloy by changing its mechanical properties and the dissipation of friction heat. Compared with 293K, the coefficient of friction decreases by 14.66% and the wear rate decreases by 70.79% at 173K. The main wear mechanisms of 5A06 aluminum alloy are delamination wear and oxidation wear at 293K and 273K, and a combination of abrasive wear, adhesive wear and oxidation wear at 223K and 173K.