TY - GEN
T1 - Dynamic deformation and failure behaviour of Al-Sc alloy under shear loading
AU - Lee, Woei-Shyan
AU - Lin, C. F.
AU - Lin, Yu-Cheng
PY - 2006/8/1
Y1 - 2006/8/1
N2 - The dynamic shear deformation behaviour and fracture characteristics of Al-Sc alloy are studied using a split-Hopkinson torsional bar at shear strain rates of 800 s-1, 1800 s-1 and 2800 s-1 and temperatures of -150°C, 25°C and 300°C. The experimental results indicate that the shear strain, shear strain rate and temperature all have a significant influence on the mechanical properties of the alloy. The fracture surfaces of the gauge length section of the deformed specimen are twisted into band-like features as a result of intensive localized shear deformation. The width and microhardness of the shear band changes with strain rate and temperature as a result of different work hardening effects. Specimen fracture initiates at the Al3Sc precipitate/matrix interface. The presence of precipitates accelerates the dynamic shear fracture formation via microcracking.
AB - The dynamic shear deformation behaviour and fracture characteristics of Al-Sc alloy are studied using a split-Hopkinson torsional bar at shear strain rates of 800 s-1, 1800 s-1 and 2800 s-1 and temperatures of -150°C, 25°C and 300°C. The experimental results indicate that the shear strain, shear strain rate and temperature all have a significant influence on the mechanical properties of the alloy. The fracture surfaces of the gauge length section of the deformed specimen are twisted into band-like features as a result of intensive localized shear deformation. The width and microhardness of the shear band changes with strain rate and temperature as a result of different work hardening effects. Specimen fracture initiates at the Al3Sc precipitate/matrix interface. The presence of precipitates accelerates the dynamic shear fracture formation via microcracking.
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U2 - 10.1051/jp4:2006134147
DO - 10.1051/jp4:2006134147
M3 - Conference contribution
AN - SCOPUS:33750594749
SN - 2868839444
SN - 9782868839442
T3 - Journal De Physique. IV : JP
SP - 965
EP - 970
BT - Proceedings - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading, EURODYMAT 2006
T2 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading
Y2 - 11 September 2006 through 15 September 2006
ER -