TY - GEN
T1 - Shock-induced mechanical response and substructural evolution of Ti-6Al-4V alloy
AU - Ren, Yu
AU - Zhou, Shimeng
AU - Xue, Zhiyong
AU - Tan, Chengwen
N1 - Publisher Copyright:
© The Minerals, Metals & Materials Society 2018.
PY - 2018
Y1 - 2018
N2 - The effects of shock stress amplitude on the post-shock mechanical response and substructural evolution of Ti–6Al–4V alloy are investigated within the impact stress range of 6–10 GPa. The reload yield behavior of post-shock Ti–6Al– 4V does not exhibit enhanced shock-induced strengthening at an effective strain level even if the shock stress achieves 10 GPa. The residual substructures of post-shock Ti–6Al–4V are examined by transmission electron microscopy. Results reveal that planar slip is the dominant deformation mechanism of this alloy during shock loading pulse. Dislocations tangle and form developed dislocation clusters (planar slip bands) with increased impact stress. The lack of dislocation cells or cell-like structures, high-density twins and additional strengthening phases limits the shock-induced strengthening effect in post-shock materials. However, dislocation multiplication and tangles lead to increased yield strength and strain hardening rate of reloaded materials.
AB - The effects of shock stress amplitude on the post-shock mechanical response and substructural evolution of Ti–6Al–4V alloy are investigated within the impact stress range of 6–10 GPa. The reload yield behavior of post-shock Ti–6Al– 4V does not exhibit enhanced shock-induced strengthening at an effective strain level even if the shock stress achieves 10 GPa. The residual substructures of post-shock Ti–6Al–4V are examined by transmission electron microscopy. Results reveal that planar slip is the dominant deformation mechanism of this alloy during shock loading pulse. Dislocations tangle and form developed dislocation clusters (planar slip bands) with increased impact stress. The lack of dislocation cells or cell-like structures, high-density twins and additional strengthening phases limits the shock-induced strengthening effect in post-shock materials. However, dislocation multiplication and tangles lead to increased yield strength and strain hardening rate of reloaded materials.
KW - Reload mechanical properties
KW - Shock wave loading
KW - Substructural evolution
KW - Ti-6Al-4V alloy
UR - http://www.scopus.com/inward/record.url?scp=85044471023&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-72526-0_46
DO - 10.1007/978-3-319-72526-0_46
M3 - Conference contribution
AN - SCOPUS:85044471023
SN - 9783319725253
T3 - Minerals, Metals and Materials Series
SP - 489
EP - 496
BT - TMS 2018 147th Annual Meeting and Exhibition Supplemental Proceedings
PB - Springer International Publishing
T2 - 147th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2018
Y2 - 11 March 2018 through 15 March 2018
ER -