TY - JOUR
T1 - Effect of rolling temperature on the evolution of defects and properties of an Al-Cu alloy
AU - Sarma, V. Subramanya
AU - Jian, W. W.
AU - Wang, J.
AU - Conrad, H.
AU - Zhu, Y. T.
PY - 2010/9
Y1 - 2010/9
N2 - The defects and properties of a precipitation hardening Al-Cu alloy 2017 were studied after rolling at room temperature (RT) and cryogenic (liquid N2) temperature (CT). It is found that CT rolling produced practically the same hardness as RT rolling for a wide range of rolling strains. However, electrical resistivity measurement revealed a clear difference indicating different defect structures in the CT- and RT-rolled samples. This difference led to higher hardness, after subsequent ageing, for samples processed by CT rolling. It is deduced that precipitation occurred during RT rolling, which compensated for the effect of lower dislocation density (evaluated from X-ray diffraction) in RT-rolled sample, and consequently resulted in similar hardness in both RT- and CT-rolled samples. It is noted that after ageing, CT-rolled sample has higher strength (∼35%) than the standard T4 treatment. © 2010 Springer Science+Business Media, LLC.
AB - The defects and properties of a precipitation hardening Al-Cu alloy 2017 were studied after rolling at room temperature (RT) and cryogenic (liquid N2) temperature (CT). It is found that CT rolling produced practically the same hardness as RT rolling for a wide range of rolling strains. However, electrical resistivity measurement revealed a clear difference indicating different defect structures in the CT- and RT-rolled samples. This difference led to higher hardness, after subsequent ageing, for samples processed by CT rolling. It is deduced that precipitation occurred during RT rolling, which compensated for the effect of lower dislocation density (evaluated from X-ray diffraction) in RT-rolled sample, and consequently resulted in similar hardness in both RT- and CT-rolled samples. It is noted that after ageing, CT-rolled sample has higher strength (∼35%) than the standard T4 treatment. © 2010 Springer Science+Business Media, LLC.
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U2 - 10.1007/s10853-010-4484-6
DO - 10.1007/s10853-010-4484-6
M3 - RGC 21 - Publication in refereed journal
SN - 0022-2461
VL - 45
SP - 4846
EP - 4850
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 17
ER -