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강전연 ( Jun-yun Kang ),박성원 ( Seongwon Park ),박준영 ( Jun Young Park ),박성준 ( Seong-jun Park ),송이화 ( Yi-hwa Song ),박성택 ( Sung-taek Park ),김광련 ( Gwang-lyeon Kim ),오경원 ( Kyeong-won Oh ) 한국열처리공학회 2018 熱處理工學會誌 Vol.31 No.6
Two different modes of rolling were applied to control the texture development in tantalum sheet. In the conventional uni-directional rolling, the typical rolling textures of a body-centered cubic metal which was primarily composed of <110>//(rolling direction) was developed. In a cross rolling where the specimen was rotated by 90o between each pass, the rotated cube components, i.e. {100}<011> were greatly reinforced. The prediction of lattice rotation by the full-constraint Taylor model showed that the high stability and the symmetry of the rotated cube components caused their strengthening in cross-rolling. The two specimens were heated to 1,100℃ at 9℃/ min and held for 1 hour for annealing, then cooled to room temperature in atmosphere. In spite of the significant difference in the deformation textures, the annealing textures were very similar. They developed strong <111>// (plane normal) components with negligible intensity at the rotated cube components, which was attributed to the negligible capability of the latter components to provide effective recrystallized grains. (Received September 10, 2018; Revised October 11, 2018; Accepted October 17, 2018)