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The Influence of Cryogenic Conditions on the Process of AA2519 Aluminum Alloy Cracking.

ABSTRACT: This study presents the results of tests involving determining quantities used to describe fracture toughness of a heat-treated AA2519 aluminum alloy applied in, among other things, constructing American military amphibians. These quantities were determined using the J-R curve method for two temperature values, 293 K and 77 K. The low temperature was provided by putting the tested specimen into a liquid nitrogen bath and keeping it there throughout the experiment. Based on the tests results, cryogenic conditions cause an increase in the maximum experimental value of the J-JQ integral, from 66.3 to 87.3 kJ/m2 Moreover, an analysis of the fatigue fracture microstructure revealed differences between specimens tested in ambient temperature and those tested in cryogenic temperature.

SUBMITTER: Kotyk M

PROVIDER: S-EPMC7178225 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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The Influence of Cryogenic Conditions on the Process of AA2519 Aluminum Alloy Cracking.

Kotyk M M Boroński D D Maćkowiak P P

Materials (Basel, Switzerland) 20200327 7

This study presents the results of tests involving determining quantities used to describe fracture toughness of a heat-treated AA2519 aluminum alloy applied in, among other things, constructing American military amphibians. These quantities were determined using the J-R curve method for two temperature values, 293 K and 77 K. The low temperature was provided by putting the tested specimen into a liquid nitrogen bath and keeping it there throughout the experiment. Based on the tests results, cry ...[more]

PMID: 32230924

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