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Influence of δ' Phase with GP‑I Zones Fillings on Slip Behavior and Cold Rolling Texture in AA2099
Xusheng Yang,Weijiu Huang,Xianghui Zhu,Fei Guo,Yanlong Ma,Linjiang Chai,Ran Zhang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
The cold rolling texture of AA2099 sheets was strongly influenced by the prior heat treatment. Two typical heat treatments,including solid solution (T4) and underaging (T6) were utilized to control slip behavior by different precipitates during coldrolling. A much weaker texture with an orientation scatter towards higher Φ angles was found in the as-rolled T6 specimen(T6R). Slip behavior was analyzed using geometry necessary boundaries distribution. Results show that the T6R specimenexperienced a strong co-planar slip compared to the as-rolled T4 specimen. Prosperity of co-planar slips and limitation ofco-direction slips were main reasons for the weakening of Copper texture component in the T6R specimen. The distinguishslip behavior was caused by existence of δ' phase with GP-I zones fillings in the T6 specimen. This phase could be easilysheared by dislocations and then promoted co-planar slips in further deformation.