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Equal channel angular pressing of wire-formed Al6063 by PU rubber-assisted procedure
The Journal of Strain Analysis for Engineering Design ( IF 1.6 ) Pub Date : 2021-09-14 , DOI: 10.1177/03093247211045605
Mahmoud Ebrahimi 1 , Shokouh Attarilar 2 , Hatice-Varol Özkavak 3 , Ceren Gode 4
Affiliation  

Expanding suitable severe plastic deformation processes seems essential to design lightweight wire-formed materials for emerging demands. In this regard, 6063 aluminum alloy in the form of wire was processed successfully by polyurethane rubber assisted-equal channel angular pressing up to 16 passes by route BC. It was found that significant improvement of hardness and strength is achieved at the initial passes due to the increment of material’s dislocations density which leads to the crystallite size decrease and lattice microstrain increase. Also, subsequent passes improve the mechanical properties with a gentle rate due to the saturation of dislocation strengthening. The fractography analysis indicated that the ductile fracture mode of the annealed aluminum decreases by imposing the ECAP process. It is related to the formation of cleavage and rive patterns and the reduction in the number and size of the dimples compared to the initial condition. Eventually, X-ray diffraction findings showed that by adding pass numbers, the isotropy degree of the aluminum sample enhances because of the lowest diffraction scattering.



中文翻译:

PU橡胶辅助工艺对线材成型的Al6063进行等通道角压

扩展合适的严重塑性变形过程似乎对于设计轻量级线材成型材料以满足新兴需求至关重要。对此,6063铝合金线材通过聚氨酯橡胶辅助等通道角压工艺成功加工至16道次B C. 结果表明,由于材料位错密度的增加,导致晶粒尺寸减小和晶格微应变增加,在初始道次处实现了硬度和强度的显着提高。此外,由于位错强化的饱和,随后的道次以温和的速度提高了机械性能。断口分析表明,实施ECAP工艺后,退火铝的韧性断裂模式降低。与初始条件相比,它与解理和裂隙图案的形成以及凹坑的数量和大小的减少有关。最终,X 射线衍射结果表明,通过增加通过数,铝样品的各向同性程度提高,因为衍射散射最低。

更新日期:2021-09-14
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