TY - JOUR
T1 - The high speed collision induced ultrahard recrystallized pure Ni
AU - Jinlong, Lv
AU - Lei, Cheng
AU - Wang, Zhuqing
AU - Miura, Hideo
PY - 2018/10/24
Y1 - 2018/10/24
N2 - The microstructures and strength of pure Ni ball after high speed collision process were investigated. The elongated and equiaxed nanocrystallines with high angle grain boundaries and random grain orientation were formed near the interface position due to high strain and strain rate. Sufficient intragranular recrystallization occurred due to shock induced storage energy. Sufficient recrystallization in the grain interior facilitated to activate dislocation in the process of subsequent deformation and resulted in ameliorated hardness. Moreover, the high angle grain boundaries could effectively impede the dislocation movement, which also significantly enhanced the strength of Ni ball near the interface.
AB - The microstructures and strength of pure Ni ball after high speed collision process were investigated. The elongated and equiaxed nanocrystallines with high angle grain boundaries and random grain orientation were formed near the interface position due to high strain and strain rate. Sufficient intragranular recrystallization occurred due to shock induced storage energy. Sufficient recrystallization in the grain interior facilitated to activate dislocation in the process of subsequent deformation and resulted in ameliorated hardness. Moreover, the high angle grain boundaries could effectively impede the dislocation movement, which also significantly enhanced the strength of Ni ball near the interface.
KW - High angle boundaries
KW - High speed collision
KW - Nanocrystallines
KW - Nickel
KW - Strength
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U2 - 10.1016/j.msea.2018.09.022
DO - 10.1016/j.msea.2018.09.022
M3 - Article
AN - SCOPUS:85053085539
VL - 736
SP - 349
EP - 353
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -