Effect of Impurities on Dynamic Recrystallization in Copper Deformed in Bridgman Anvils

D. K. Orlova; T. I. Chashchukhina; L. M. Voronova; M. V. Degtyarev; Yu. G. Krasnoperova

doi:10.17804/2410-9908.2015.5.090-098

D. K. Orlova, T. I. Chashchukhina, L. M. Voronova, M. V. Degtyarev, Yu. G. Krasnoperova

EFFECT OF IMPURITIES ON DYNAMIC RECRYSTALLIZATION IN COPPER DEFORMED IN BRIDGMAN ANVILS

DOI: 10.17804/2410-9908.2015.5.090-098

The structure of copper with a various content of impurities (0.01, 0.03, and 0.1 wt %) is studied after high pressure torsion at room temperature. It is shown that the content of impurities does not affect the true strain (e = 2) required for the onset of dynamic recrystallization (DR). It has been revealed that the temperature–strain-rate conditions (lnZ), which were the same for copper of various purity, are responsible for the degree of the dynamic recrystallization completeness and the respective type of the formed structure. The correspondence between the range of lnZ and the structure type formed during deformation has been established. Impurity dragging prevents grain growth upon postdynamic recrystallization and ensures the formation of a more dimensionally uniform structure at the stage of partial DR. At the stage of developed DR, the content of impurities in copper does not affect the grain size.

Keywords: severe plastic deformation, copper, temperature-compensated strain rate, dynamic recrystallization, postdynamic recrystallization, structure

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Д. К. Орлова, Т. И. Чащухина, Л. М. Воронова, М. В. Дегтярев, Ю. Г. Красноперова

ВЛИЯНИЕ ПРИМЕСЕЙ НА ДИНАМИЧЕСКУЮ РЕКРИСТАЛЛИЗАЦИЮ В МЕДИ, ДЕФОРМИРОВАННОЙ В НАКОВАЛЬНЯХ БРИДЖМЕНА

Проведено исследование структуры меди с различным (0.01, 0.03 и 0.1 мас.%) содержанием примесей, деформированной при комнатной температуре методом сдвига под давлением. Показано, что количество примесей не влияет на величину деформации (е = 2), необходимой для начала динамической рекристаллизации (ДР). Установлено, что полнота протекания динамической рекристаллизации, и соответственно тип формирующейся структуры определяется температурно-скоростными условиями деформации (lnZ), одинаковыми для меди разной степени чистоты. Выявлены интервалы lnZ, отвечающего за тип структуры, формирующейся при деформации. Примесное торможение препятствует росту зерна при постдинамической рекристаллизации и способствует образованию более размерно однородной структуры на стадии частичной ДР. На стадии развитой ДР содержание примесей в меди не влияет на размер зерна.

Ключевые слова: большая пластическая деформация, медь, температурно-скомпенсированная скорость деформации, динамическая рекристаллизация, постдинамическая рекристаллизация, структура

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Библиографическая ссылка на статью

Effect of Impurities on Dynamic Recrystallization in Copper Deformed in Bridgman Anvils / D. K. Orlova, T. I. Chashchukhina, L. M. Voronova, M. V. Degtyarev, Yu. G. Krasnoperova // Diagnostics, Resource and Mechanics of materials and structures. - 2015. - Iss. 5. - P. 90-98. -
DOI: 10.17804/2410-9908.2015.5.090-098. -
URL: http://dream-journal.org/issues/2015-5/2015-5_48.html
(accessed: 30.12.2024).