Accession Number : AD1050391


Title :   Thermal Exposure and Environment Effects on Tension, Fracture and Fatigue of 5XXX Alloys Tested in Different Orientations


Descriptive Note : Technical Report,01 Jun 2014,30 Sep 2017


Corporate Author : Case Western Reserve University CLEVELAND United States


Personal Author(s) : Lewandowski,John J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1050391.pdf


Report Date : 27 Dec 2017


Pagination or Media Count : 12


Abstract : The work involved a systematic study to determine the effects of changes in temper (e.g.H131, H116, H128), thermal exposure conditions (i.e.time, temperature), and environment (e.g. dry air, humid air, solutions) on the environmental cracking susceptibility at different loading rates in both the S-T and L-T orientations. Experiments were conducted using slow strain rate tension (SSRT), fatigue crack growth using dcPD, and experiments conducted on fatigue precracked samples to determine the effects of changes in loading rate on cracking susceptibility. In addition, access to high resolution tomography occurred via a visit to the Harwell Diamond Light Source (DLS), UK where in -situ cracking experiments were conducted as well as tomography experiments on previously tested samples. Regimes of EAC susceptibility were determined and the effects of changes in loading rate and solution on this susceptibility were determined.


Descriptors :   high resolution , aluminum alloys , magnesium alloys , strain rate , physical metallurgy , advanced materials , crack propagation , corrosion , fatigue cracking , mechanical properties , cracks


Subject Categories : Properties of Metals and Alloys


Distribution Statement : APPROVED FOR PUBLIC RELEASE