Superlightweight nanoengineered aluminum for strength under impact

作者：Zhang Haitao^*; Ye Jichun; Joshi Shailendra P; Schoenung Julie M; Chin Ernest S C; Gazonas George A; Ramesh Kaliat T

来源：Advanced Engineering Materials, 2007, 9(5): 355-359.

DOI：10.1002/adem.200700015

• Flow strength
• Nanoengineered
• Strength under impact
• Structural length
• Superlightweight

The dynamic flow strength of a selectively dispersed nano/micro component material (TriMod) such as nanoengineered aluminum, are discussed. Nanoengineered aluminum exhibits excellent mechanical properties at impact rates of deformation through a three micro-structural length scale approaches such as strengthening through a nanocrystalline core architecture, additional strengthening through length scale dependent reinforcement with micro-size ceramic particles, and enhanced ductility through incorporation of volume fraction of microscale grains. TriMod shows higher ductility while achieving higher specific strength under very high rates of deformation. The tri-modal Al-5083 composite alloy possess higher stiffness and strength in comparison to conventional Al-5083 alloy. The increased nucleation of microcracks at high rates of deformation leads to an effective increase in the total strain to failure at high strain rates.

• 出版日期2007
• 单位University of California; Johns Hopkins University