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Structural and Density Changes of Rhenium Single Crystals Upon Rolling and Annealing
Author(s) -
Larikov L.,
Belyakova M.,
Rafalovski V.
Publication year - 1991
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170260219
Subject(s) - annealing (glass) , recrystallization (geology) , rhenium , crystal twinning , materials science , crystallography , composite material , metallurgy , microstructure , chemistry , geology , paleontology
The rhenium crystals were rolled in the {1000} 〈11 2 0〉 orientation. Rolling produces cracks in crystals at low deformation (ϵ = 30%). It has been shown that microcracks in the volume of the crystal arise at a more earlier deformation stage than visible surface cracks. Recrystallization during subsequent annealing is strongly intensified with the start of crack formation. Stepwise facets of recrystallizated grains are often observed, this fact being connected with twinning lamellae recrystallization. Microcracks in the crystal body are completely eliminated during high temperature annealing. This process caused by diffusion over microcracks surfaces.