Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 25    No. 2    February 2015

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Dynamic response and numerical simulation of Al-Sc and Al-Ti alloys under high-speed impact
Wei-gui ZHANG1, Liang-ju HE2, Pei-jie LI1, Yi-cong YE3, Xue FENG2, L. S. NOVIKOV4

1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China;
3. College of Aerospace Science and Engineering, National University of Defense Technology,
Changsha 410073, China;
4. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119992, Russia

Abstract:Al-Sc and Al-Ti semi-infinite targets were impacted by high-speed projectiles at velocities of 0.8, 1.0, 1.2 and 1.5 km/s, respectively. It is found that the Al-Sc targets demonstrate more excellent ability to resist high-speed impact. It is concluded that different microstructures of Al-Sc and Al-Ti alloys, including different grain sizes and secondary particles precipitated in the matrix, result in their greatly different capabilities of resisting impact. Furthermore, the effect of the size range of nanoscale Al3Sc precipitate in Al-Sc alloy on the resistance of high-speed impact was investigated. In addition, computer simulations and validation of these simulations were developed which fairly accurately represented residual crater shapes/geometries. Validated computer simulations allowed representative extrapolations of impact craters well beyond the laboratory where melt and solidification occurred at the crater wall, especially for hypervelocity impact (>5 km/s).

 

Key words: Al-Sc alloy; Al-Ti alloy; Al3Sc; high-speed impact; dynamic response; numerical simulation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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