Abstract
Spall formation in the glass-forming alloy Cu-Ti was studied via molecular dynamics simulations. It is shown that spall initiation is a combined process where void nucleation is accompanied by local amorphization. The amorphous regions nucleate at the surfaces of the voids at a critical stress and then grow, allowing the voids to grow faster in the mechanically less stable amorphous region. Dislocations are emitted from the amorphous regions and form shear bands between the amorphous regions. Subspall events result in the formation of a damaged layer, including voids, amorphous regions, and shear bands. The simulations are consistent with recent experimental observation of intergranular amorphous bands in shocked boron carbide.
| Original language | English |
|---|---|
| Article number | 051907 |
| Pages (from-to) | 1-3 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 86 |
| Issue number | 5 |
| DOIs | |
| State | Published - 31 Jan 2005 |
Bibliographical note
Funding Information:The research was supported by the U.S. Department of Energy (USDOE) Basic Energy Sciences, under Grant No. DEFG02-91ER45439 and the USDOE through the University of California under Subgrant B341494, No. 73722, and the USDOE National Nuclear Security Administration, under Grant No. DEFG03-02NA00070. Grants of computer time from the National Center for Supercomputing Applications and the National Energy Research Scientific Computing Center are gratefully acknowledged.