TY - JOUR
T1 - A high temperature nanoindentation study of Al-Cu wrought alloy
AU - Koch, Susanne
AU - Abad, Manuel D.
AU - Renhart, Susanna
AU - Antrekowitsch, Helmut
AU - Hosemann, Peter
N1 - Funding Information:
We thank the Department of Nuclear Engineering, University of California, Berkeley for their generous time and cooperation. We would like to extend our appreciation to the Institute of Nonferrous Metallurgy, Montanuniversität Leoben, Austria for their generous support. Also we thank the DOE for financial support.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/9/7
Y1 - 2015/9/7
N2 - Aluminum-copper alloys are widely used because of their low density and good mechanical strength accomplished with precipitation hardening. The alloy Al-Cu-Mg-Pb (AA2030) has been investigated before and after aging, at room temperature and at high temperatures. The mechanical properties at room temperature have been studied by Brinell hardness tests. T4 and T6 stages of the alloy have been investigated by differential scanning calorimetry up to 450°C, showing the precipitation of different clusters. High temperature nanoindentation has been used to characterize the mechanical properties up to 460°C in order to obtain a better understanding of the local dominating deformation mechanism in the material. A continuous decrease in the hardness and Young's modulus was found with the increasing temperature. The strain rate sensitivity of the alloy increased with the temperature from 0.022 at RT, up to 0.16 at 460°C. The activation volume was constant (around 31-41b3) up to 240°C, beyond this point a large increase was observed up to 178b3. The results were comparable with similar materials, and indicate thermally activated processes.
AB - Aluminum-copper alloys are widely used because of their low density and good mechanical strength accomplished with precipitation hardening. The alloy Al-Cu-Mg-Pb (AA2030) has been investigated before and after aging, at room temperature and at high temperatures. The mechanical properties at room temperature have been studied by Brinell hardness tests. T4 and T6 stages of the alloy have been investigated by differential scanning calorimetry up to 450°C, showing the precipitation of different clusters. High temperature nanoindentation has been used to characterize the mechanical properties up to 460°C in order to obtain a better understanding of the local dominating deformation mechanism in the material. A continuous decrease in the hardness and Young's modulus was found with the increasing temperature. The strain rate sensitivity of the alloy increased with the temperature from 0.022 at RT, up to 0.16 at 460°C. The activation volume was constant (around 31-41b3) up to 240°C, beyond this point a large increase was observed up to 178b3. The results were comparable with similar materials, and indicate thermally activated processes.
KW - Age hardening
KW - Aluminum alloys
KW - Mechanical characterization
KW - Nanoindentation
UR - https://www.scopus.com/pages/publications/84938245154
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pure_univeritat_ramon_llull&SrcAuth=WosAPI&KeyUT=WOS:000361258200027&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.1016/j.msea.2015.07.066
DO - 10.1016/j.msea.2015.07.066
M3 - Article
AN - SCOPUS:84938245154
SN - 0921-5093
VL - 644
SP - 218
EP - 224
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
ER -