首页|Microstructure and texture evolution in commercial-purity Zr 702 during cold rolling and annealing
Microstructure and texture evolution in commercial-purity Zr 702 during cold rolling and annealing
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Microstructure and texture evolution in commercial-purity Zr 702 during cold rolling and annealing was investigated by optical microscopy, transmission electron microscopy, and X-ray diffraction. The results showed that crystallographic slip was the predominant de-formation mechanism in the early stage of deformation. Deformation twins started to form when the rolling reduction was larger than 38.9%;both the dislocation density and the number of twins increased with increasing rolling reduction. The initial texture of the Zr 702 plate con-sisted of the basal fiber component. During cold rolling the strength of the basal fiber first decreased and then increased with increasing roll-ing reduction. The cold-rolled sheets were fully recrystallized after being annealed at 550°C. The recrystallization temperature and the size of recrystallized grains decreased with increasing rolling reduction. A larger rolling reduction resulted in a higher grain growth rate when the annealing temperature increased from 550°C to 700°C. The recrystallization texture was characterized by a major basal fiber and a minor{01 1 3}<2 1 1 0>component. The strength of the recrystallization texture increased with increasing rolling reduction.
Min Ma、Ming-he Li、Yuan-biao Tan、Hui Yuan、Wen-chang Liu
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Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
This work was financially supported by the National Ba-sic Research and Development Program of China
NETL
NSTL
万方数据
维普
