Simultaneous improvement in strength and ductility of AA6082 by interrupted aging

IF 4.2 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids Pub Date : 2025-06-03 DOI:10.1016/j.euromechsol.2025.105753

Engin Tan , Ismail Ovali , Rüçhan Yildiz , Derya Dispinar

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Abstract

This study investigated the effects of T6I4 and T6I6 interrupted aging heat treatments on the mechanical and microstructural changes in AA6082 aluminum alloy and proposed them as alternatives to the conventional T6 aging process. The interrupted aging was carried out up to 528 h for T6I4, and 240 h for T6I6. The mechanical response of the alloy after interrupted aging was characterized using hardness measurement, uniaxial tensile, three-point bending, wear tests, and surface roughness measurement. The results show that T6I4 treatment provided a 26.2 % increase in hardness, while T6I6 provided a 34.1 % improvement over T6 temper, exhibiting significant strengthening effects. In addition, T6I4 improved the tensile strength by 42 % and elongation by 37.9 %, while T6I6 led to a 53.1 % improvement in tensile strength and a remarkable 52.4 % increase in ductility. Wear tests confirmed the superior wear resistance of T6I4-528 and T6I6-216 samples with reduced volume loss and improved surface roughness of 24.07 % and 37.9 %, respectively.

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中断时效法同时提高AA6082的强度和延展性

研究了T6I4和T6I6中断时效热处理对AA6082铝合金力学和组织变化的影响，提出了T6I4和T6I6中断时效热处理可替代传统的T6时效工艺。T6I4和T6I6分别进行了528 h和240 h的中断时效。通过硬度测试、单轴拉伸、三点弯曲、磨损测试和表面粗糙度测试，表征了合金在中断时效后的力学响应。结果表明，与T6回火相比，T6I4处理的硬度提高了26.2%，T6I6处理的硬度提高了34.1%，强化效果显著。此外，T6I4的抗拉强度提高了42%，伸长率提高了37.9%，而T6I6的抗拉强度提高了53.1%，塑性提高了52.4%。磨损试验证实，T6I4-528和T6I6-216样品具有优异的耐磨性，体积损失降低了24.07%，表面粗糙度提高了37.9%。

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来源期刊

European Journal of Mechanics A-Solids 物理-力学

CiteScore

7.00

自引率

7.30%

发文量

275

审稿时长

48 days

期刊介绍： The European Journal of Mechanics endash; A/Solids continues to publish articles in English in all areas of Solid Mechanics from the physical and mathematical basis to materials engineering, technological applications and methods of modern computational mechanics, both pure and applied research.