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Interplay of Shock-induced Melting and Alloying in Nanostructured Multilayer Films

Published online by Cambridge University Press:  26 February 2011

Shijin Zhao ,
Timothy C. Germann  and
Alejandro Strachan
Shijin Zhao
Affiliation:
[email protected], Los Alamos National Laboratory, Theoretical Division, MS G756, Los Alamos National Laboratory, Los Alamos, NM, 87545, United States, 505-665-0405, 505-665-9427
Timothy C. Germann
Affiliation:
[email protected], Los Alamos National Laboratory, Applied Physics Division, Los Alamos, NM, 87545, United States
Alejandro Strachan
Affiliation:
[email protected], Purdue University, School of Materials Engineering, West Lafayette, IN, 47907, United States
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Abstract

We identify a shock-induced melting and great facilities of the melting in accelerating subsequent alloying reactions in nanostructured Ni/Al multilayer films using a novel molecular dynamics technique, which captures the initial shock transit as well as the subsequent long time scale alloying process. We observe a pronounced increase of the pressure in the melting process (i.e., a process of coexistence of solid and liquid phases). As soon as the melting completes, the temperature increases dramatically indicating a start of explosive alloying reactions and the pressure starts to decrease. The pressure going up or down is determined by the competition between melting and alloying reactions.

Keywords

alloysimulationphase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 978: Symposium GG – Multiscale Modeling of Materials , 2006 , 0978-GG05-20
Copyright
Copyright © Materials Research Society 2007

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