TY - GEN
T1 - Adiabatic shear localization of AL-SC alloy at extremely high strain rate
AU - Lee, Woei-Shyan
AU - Chen, Tao Hsing
AU - Lu, Ging Ting
PY - 2010/5/21
Y1 - 2010/5/21
N2 - The adiabatic shear behaviour of aluminum-scandium(Al-Sc) alloy under high strain rates ranging from 3.0×105 s-1 to 6.3×l05 s-1 is studied by using a compressive-type split-Hopkinson pressure bar (SHPB). The results show that both the shear stress and the strain rate sensitivity increase with increasing the strain rate. In addition, it is shown that an adiabatic shear band is formed within the deformed specimens for all values of the strain rate. As the strain rate is increased, the width of the shear band decreases, but the microhardness increases. At a strain rate of 3.0×105 s-1, the fracture surface is characterised by multiple transgranular cleavage fractures. However, for strain rates greater than 4.5X×105 s1, the fracture surface has a transgranular dimple-like characteristic, and thus it is inferred that the duetility of the unweldable Al-Sc alloy improves with increasing the strain rate.
AB - The adiabatic shear behaviour of aluminum-scandium(Al-Sc) alloy under high strain rates ranging from 3.0×105 s-1 to 6.3×l05 s-1 is studied by using a compressive-type split-Hopkinson pressure bar (SHPB). The results show that both the shear stress and the strain rate sensitivity increase with increasing the strain rate. In addition, it is shown that an adiabatic shear band is formed within the deformed specimens for all values of the strain rate. As the strain rate is increased, the width of the shear band decreases, but the microhardness increases. At a strain rate of 3.0×105 s-1, the fracture surface is characterised by multiple transgranular cleavage fractures. However, for strain rates greater than 4.5X×105 s1, the fracture surface has a transgranular dimple-like characteristic, and thus it is inferred that the duetility of the unweldable Al-Sc alloy improves with increasing the strain rate.
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M3 - Conference contribution
AN - SCOPUS:77952397271
SN - 9780873397513
T3 - TMS Annual Meeting
SP - 145
EP - 150
BT - TMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
T2 - TMS 2010 - 139th Annual Meeting and Exhibition
Y2 - 14 February 2010 through 18 February 2010
ER -