Abstract
The manufacturing process of multiport extrusion tubes generally includes homogenization, extrusion, roll leveling and heat treatment. In order to investigate the influence of the manufacturing procedures on strength variation of multiport extrusion tubes made of A1100 and A3102 alloys, the tube fabrication experiments and following materials characterization are carried out. The alloys’ stress–strain curves after every processing procedure are measured, and pressure-bearing capacity of the tubes is tested. The tubes’ strength and pressure-bearing capacity reach the peak values after straightening process and drop to the minimum after annealing. The contributions of solid solution hardening, grain boundary hardening and constituent particle strengthening to yield strength are evaluated. It is deduced that cluster hardening is the dominant strengthening mechanism for the as-homogenized and as-extruded samples; the contribution of clusters is second to work hardening after straightening process; slight cold work in conjunction with high-temperature annealing accelerates abnormal grain growth. The loss of strength increment from clusters can be interpreted by the remarkable reduction of high-angle grain boundaries after abnormal grain growth.
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Acknowledgments
The authors acknowledge the funding from the National Natural Science Foundation of China (Project No. 51705315, 51575346). Additionally, supports to this study from Selected Foundation of Ministry of Education of China (Project No. 20120073130010) and Natural Science Foundation of Shanghai (Project No. 15ZR1424100) are kindly acknowledged. DL thank the support of Materials Genome Initiative Center, Shanghai Jiao Tong University.
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Li, K., Li, D., Zou, T. et al. Strength Variation in Processing Multiport Extrusion Tubes of A1100 and A3102 Alloys. J. of Materi Eng and Perform 28, 3576–3589 (2019). https://doi.org/10.1007/s11665-019-04132-w
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DOI: https://doi.org/10.1007/s11665-019-04132-w