Correlation of dynamic compressive properties, adiabatic shear banding, and ballistic performance of high-strength 2139 and 7056 aluminum alloys

Selim Kim; Min Cheol Jo; Tae Won Park; Jinhee Ham; Seok Su Sohn; Sunghak Lee

doi:10.1016/j.msea.2021.140757

Correlation of dynamic compressive properties, adiabatic shear banding, and ballistic performance of high-strength 2139 and 7056 aluminum alloys

Selim Kim, Min Cheol Jo, Tae Won Park, Jinhee Ham, Seok Su Sohn, Sunghak Lee

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

In this study, laboratory-scale Split Hopkinson pressure bar (SHPB) tests were conducted on commercial armor plates composed of 2139 and 7056 Al alloys to investigate their dynamic compressive properties in relation to adiabatic shear band (ASB) formation. The results were then correlated to those of the ballistic performance as measured from V₅₀ ballistic impact tests. In the SHPB tests, the 2139 alloy was compressed and flattened with traces of cracking, whereas cracks initiated in a shear mode in the 7056 alloy and propagated to produce several pieces. The cracking behavior was further analyzed by interrupted SHPB tests, which confirmed that shear cracking occurred through the formation of deformed ASBs and subsequent locally transformed ASBs. These processes started much earlier in the 7056 alloy; therefore, it showed a lower critical strain for initiating the ASBs and lower resistance to ASB formation. This result corresponded well with the actual V₅₀ ballistic impact test results, which confirmed the better ballistic performance of the 2139 alloy. The resistance to dynamic and ballistic deformation was quantitatively discussed using the susceptibility to ASB formation.

Original language	English
Article number	140757
Journal	Materials Science and Engineering A
Volume	804
DOIs	https://doi.org/10.1016/j.msea.2021.140757
Publication status	Published - 2021 Feb 15

Bibliographical note

Funding Information:
This work was supported by the Agency for Defense Development (grant No. UE161030GD ), the BK21 Plus Center for Creative Industrial Materials, and the Korea University Grant for Prof. S.S. Sohn. This work was also supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE, P0002019 , The Competency Development Program for Industry Specialist ).

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

Adiabatic shear band (ASB)
Aluminum alloy
Ballistic performance
Split hopkinson pressure bar (SHPB)

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2021.140757

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title = "Correlation of dynamic compressive properties, adiabatic shear banding, and ballistic performance of high-strength 2139 and 7056 aluminum alloys",

abstract = "In this study, laboratory-scale Split Hopkinson pressure bar (SHPB) tests were conducted on commercial armor plates composed of 2139 and 7056 Al alloys to investigate their dynamic compressive properties in relation to adiabatic shear band (ASB) formation. The results were then correlated to those of the ballistic performance as measured from V50 ballistic impact tests. In the SHPB tests, the 2139 alloy was compressed and flattened with traces of cracking, whereas cracks initiated in a shear mode in the 7056 alloy and propagated to produce several pieces. The cracking behavior was further analyzed by interrupted SHPB tests, which confirmed that shear cracking occurred through the formation of deformed ASBs and subsequent locally transformed ASBs. These processes started much earlier in the 7056 alloy; therefore, it showed a lower critical strain for initiating the ASBs and lower resistance to ASB formation. This result corresponded well with the actual V50 ballistic impact test results, which confirmed the better ballistic performance of the 2139 alloy. The resistance to dynamic and ballistic deformation was quantitatively discussed using the susceptibility to ASB formation.",

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author = "Selim Kim and Jo, {Min Cheol} and Park, {Tae Won} and Jinhee Ham and Sohn, {Seok Su} and Sunghak Lee",

note = "Funding Information: This work was supported by the Agency for Defense Development (grant No. UE161030GD ), the BK21 Plus Center for Creative Industrial Materials, and the Korea University Grant for Prof. S.S. Sohn. This work was also supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE, P0002019 , The Competency Development Program for Industry Specialist ). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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AU - Ham, Jinhee

AU - Sohn, Seok Su

AU - Lee, Sunghak

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PY - 2021/2/15

Y1 - 2021/2/15

N2 - In this study, laboratory-scale Split Hopkinson pressure bar (SHPB) tests were conducted on commercial armor plates composed of 2139 and 7056 Al alloys to investigate their dynamic compressive properties in relation to adiabatic shear band (ASB) formation. The results were then correlated to those of the ballistic performance as measured from V50 ballistic impact tests. In the SHPB tests, the 2139 alloy was compressed and flattened with traces of cracking, whereas cracks initiated in a shear mode in the 7056 alloy and propagated to produce several pieces. The cracking behavior was further analyzed by interrupted SHPB tests, which confirmed that shear cracking occurred through the formation of deformed ASBs and subsequent locally transformed ASBs. These processes started much earlier in the 7056 alloy; therefore, it showed a lower critical strain for initiating the ASBs and lower resistance to ASB formation. This result corresponded well with the actual V50 ballistic impact test results, which confirmed the better ballistic performance of the 2139 alloy. The resistance to dynamic and ballistic deformation was quantitatively discussed using the susceptibility to ASB formation.

AB - In this study, laboratory-scale Split Hopkinson pressure bar (SHPB) tests were conducted on commercial armor plates composed of 2139 and 7056 Al alloys to investigate their dynamic compressive properties in relation to adiabatic shear band (ASB) formation. The results were then correlated to those of the ballistic performance as measured from V50 ballistic impact tests. In the SHPB tests, the 2139 alloy was compressed and flattened with traces of cracking, whereas cracks initiated in a shear mode in the 7056 alloy and propagated to produce several pieces. The cracking behavior was further analyzed by interrupted SHPB tests, which confirmed that shear cracking occurred through the formation of deformed ASBs and subsequent locally transformed ASBs. These processes started much earlier in the 7056 alloy; therefore, it showed a lower critical strain for initiating the ASBs and lower resistance to ASB formation. This result corresponded well with the actual V50 ballistic impact test results, which confirmed the better ballistic performance of the 2139 alloy. The resistance to dynamic and ballistic deformation was quantitatively discussed using the susceptibility to ASB formation.

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Correlation of dynamic compressive properties, adiabatic shear banding, and ballistic performance of high-strength 2139 and 7056 aluminum alloys

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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