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Shock‐Induced Substructural Changes in Prestrained Iron
Author(s) -
Mahajan S.
Publication year - 1969
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19690330127
Subject(s) - recrystallization (geology) , materials science , coalescence (physics) , shock wave , transmission electron microscopy , dislocation , shock (circulatory) , deformation (meteorology) , composite material , metallurgy , crystallography , mechanics , chemistry , nanotechnology , geology , physics , medicine , astrobiology , paleontology
Abstract Deformation structures of iron samples prestrained to various amounts prior to their exposure to 50 and 100 kbar shock waves have been examined by transmission electron microscopy. On shocking, the regions which had deformed during prestraining exhibit dislocation configurations characteristic of large‐strain room temperature deformation, and the undeformed areas develop substructures representative of very low‐temperature conventional deformation. Interactions between shock‐induced dislocations have also been analysed. Passage of a 100 kbar shock wave through samples prestrained 20% causes localized recrystallization. Experimental evidence favours the formation of nuclei for recrystallization by the coalescence mechanism.