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Title: Dynamic failure in two-phase materials

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4938109· OSTI ID:1240615

Previous experimental research has shown that microstructural features such as interfaces, inclusions, vacancies, and heterogeneities can all act as voidnucleation sites. However, it is not well understood how important these interfaces are to damage evolution and failure as a function of the surrounding parentmaterials. In this work, we present results on three different polycrystallinematerials: (1) Cu, (2) Cu-24 wt. %Ag, and (3) Cu-15 wt. %Nb which were studied to probe the influence of bi-metal interfaces onvoidnucleation and growth. These materials were chosen due to the range of difference in structure and bulk properties between the two phases. The initial results suggest that when there are significant differences between the bulk properties (for example: stacking fault energy, melting temperature, etc.) the type of interface between the two parent materials does not principally control the damage nucleation and growth process. Rather, it is the “weaker” material that dictates the dynamic spall strength of the overall two-phase material.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1240615
Report Number(s):
LA-UR-15-25224; JAPIAU
Journal Information:
Journal of Applied Physics, Vol. 118, Issue 23; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (4)

Unraveling the Role of Interfaces on the Spall Failure of Cu/Ta Multilayered Systems journal January 2020
The effect of distribution of second phase on dynamic damage journal August 2016
The void nucleation mechanism within lead phase during spallation of leaded brass journal April 2018
Computational Analysis Methods in Atomistic Modeling of Crystals journal December 2013

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