Evolution of Annealing Twins and Recrystallization Texture in Thin-Walled Copper Tube During Heat Treatment
来源期刊：Acta Metallurgica Sinica2020年第12期
论文作者：Song-Wei Wang Hong-Wu Song Yan Chen Shi-Hong Zhang Hai-Hong Li
摘 要：Thin-walled copper tubes are usually produced by multi-pass float-plug drawing deformation.In general,the annealing treatment subsequently is necessary to release the stored energy and adjusts the microstructure.In this study,an investigation on the evolution of annealing twins as well as textures in the thin-walled（Φ6 mm × 0.3 mm） copper tube underwent holding time-free heat treatment was reported.Electron backscattered diffraction analysis reveals that a large number of Σ3 boundaries（600 <111> twin relationship） are produced at the early stage of heat treatment,which is due to the lower boundary energy.With the recrystallization proceeding,the migration rate of grain boundaries decreases on account of the grain growth;meanwhile,the unique Σ9 boundaries（38.9°<110> relationship） are formed due to the interaction of the Σ3 boundaries.As a result,the number fractions of Σ3 boundaries and high-angle grain boundaries decrease rapidly.During the grain growth stage,a strong recrystallization texture was formed due to the fact that the grains of Goss orientation have a growth advantage over the others.As a result,the initial copper texture was transferred into the Goss texture in domination.
Song-Wei Wang1,2，Hong-Wu Song1，Yan Chen1，Shi-Hong Zhang1,2，Hai-Hong Li3
1. Institute of Metal Research ,Chinese Academy of Sciences2. School of Materials Science and Engineering ,University of Science and Technology of China3. School of Nuclear Equipment and Nuclear Engineering ,Yantai University
摘 要：Thin-walled copper tubes are usually produced by multi-pass float-plug drawing deformation.In general,the annealing treatment subsequently is necessary to release the stored energy and adjusts the microstructure.In this study,an investigation on the evolution of annealing twins as well as textures in the thin-walled（Φ6 mm × 0.3 mm） copper tube underwent holding time-free heat treatment was reported.Electron backscattered diffraction analysis reveals that a large number of Σ3 boundaries（600 <111> twin relationship） are produced at the early stage of heat treatment,which is due to the lower boundary energy.With the recrystallization proceeding,the migration rate of grain boundaries decreases on account of the grain growth;meanwhile,the unique Σ9 boundaries（38.9°<110> relationship） are formed due to the interaction of the Σ3 boundaries.As a result,the number fractions of Σ3 boundaries and high-angle grain boundaries decrease rapidly.During the grain growth stage,a strong recrystallization texture was formed due to the fact that the grains of Goss orientation have a growth advantage over the others.As a result,the initial copper texture was transferred into the Goss texture in domination.
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