Microstructure and texture evolution in commercial-purity Zr 702 during cold rolling and annealing

• Published in: International journal of minerals, metallurgy and materials Vol. 21; no. 8; pp. 785 - 795
• Main Authors: Ma, Min, Li, Ming-he, Tan, Yuan-biao, Yuan, Hui, Liu, Wen-chang
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.08.2014; Springer Nature B.V; Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
• Subjects: Annealing; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cold; Cold rolling; Composites; Corrosion and Coatings; Crystallography; Deformation mechanisms; Dislocation density; Evolution; Fibers; Glass; Grain growth; Light microscopy; Materials Science; Metallic Materials; Microscopy; Microstructure; Natural Materials; Optical microscopy; Purity; Recrystallization; Reduction; Surface layer; Surfaces and Interfaces; Texture; Thin Films; Tribology; X-ray diffraction; Zirconium; 再结晶温度; 再结晶织构; 冷轧板; 商业; 微观结构; 纯锆; 组织演变; 退火过程; microstructure; recrystallization; zirconium; annealing; texture; cold rolling
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-014-0972-z

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 deformation 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 consisted of the basal fiber component. During cold rolling the strength of the basal fiber first decreased and then increased with increasing rolling reduction. The cold-rolled sheets were fully recrystallized after being annealed at 550℃. 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℃ to 700℃. The recrystallization texture was characterized by a major basal fiber and a minor {0113}〈2110〉 component. The strength of the recrystallization texture increased with increasing rolling reduction.