The effect of distribution of second phase on dynamic damage

Fensin, Saryu J.; Jones, David R.; Walker, Emily K.; Farrow, Adam; Imhoff, Seth D.; Clarke, Kester; Trujillo, Carl P.; Martinez, Daniel T.; Gray, George T.; Cerreta, Ellen K.

doi:10.1063/1.4961041

Title: The effect of distribution of second phase on dynamic damage

Journal Article · Sun Aug 28 00:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4961041· OSTI ID:1411339

^[1]; Jones, David R. ^[1]; Walker, Emily K. ^[1]; Farrow, Adam ^[1]; Imhoff, Seth D. ^[1]; Clarke, Kester ^[1]; Trujillo, Carl P. ^[1];

^[1];

^[1]; Cerreta, Ellen K. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

For ductile metals, dynamic fracture occurs principally through void nucleation, growth, and coalescence at heterogeneities in the microstructure. Previous experimental research on high purity metals has shown that microstructural features, such as grain boundaries, inclusions, vacancies, and heterogeneities, can act as initial void nucleation sites. In addition, other research on two-phase materials has also highlighted the importance of the properties of a second phase itself in determining the dynamic response of the overall material. But, previous research has not investigated the effects of the distribution of a second phase on damage nucleation and evolution. To approach this problem in a systematic manner, two copper alloys with 1% lead materials, with the same Pb concentration but different Pb distributions, have been investigated. A new CuPb alloy was cast with a more homogeneous distribution of Pb as compared to a CuPb where the Pb congregated in large “stringer” type configurations. These materials were shock loaded at ~1.2 GPa and soft recovered. In-situ free surface velocity information, and post mortem metallography, reveals that even though the spall strength of both the materials were similar, the total extent and details of damage in the materials varied by 15%. This then suggests that altering the distribution of Pb in the Cu matrix leads to the creation of more void nucleation sites and also changed the rate of void growth.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1411339

Alternate ID(s):: OSTI ID: 1328603

Report Number(s):: LA-UR-16-23605; TRN: US1800209

Journal Information:: Journal of Applied Physics, Vol. 120, Issue 8; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 15 works

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Cited By (3)

Shock wave propagation and spall failure of nanocrystalline Cu/Ta alloys: Effect of Ta in solid-solution Chen, Jie; Tschopp, Mark A.; Dongare, Avinash M. Journal of Applied Physics, Vol. 122, Issue 22 https://doi.org/10.1063/1.5001761	journal	December 2017
Effect of peak stress and tensile strain-rate on spall in tantalum Jones, D. R.; Fensin, S. J.; Martinez, D. T. Journal of Applied Physics, Vol. 124, Issue 8 https://doi.org/10.1063/1.5045045	journal	August 2018
The void nucleation mechanism within lead phase during spallation of leaded brass Yang, Yang; Wang, Can; Chen, Xingzhi Philosophical Magazine, Vol. 98, Issue 21 https://doi.org/10.1080/14786435.2018.1468942	journal	April 2018

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