FATIGUE CRACK GROWTH BEHAVIOUR OF AA6013 ALUMINUM ALLOY

The effect of different aging treatments on fatigue
crack growth behavior of
AA6013 aluminum alloy was investigated. C(T)
(Compact Tension) specimens
were prepared in L-T and T-L direction for fatigue
crack growth tests. Samples
were in T651 as received, T42 which is solution heat
treated at 538 ºC for 90
minutes, water quenched and aged in room temperature
for 96 hours, and one
group of samples were overaged at 245 ºC for 12
hours after T42 condition was
achieved. Hardness and conductivity measurements
were achieved for all
conditions after the heat treatments.
Fatigue crack growth tests were performed at as
received condition T651, T42
and 245 ºC aged samples in laboratory air with
sinusoidal loading of stress ratio
R=0.1 and at a frequency of 1 Hz. The highest
fatigue crack growth resistance is
observed for T651 T-L and 245 ºC overaged L-T
condition.

Autorentext

Egemen VARLISenior Research EngineerTurkish Scientific and Technological Research Concil, Defence Industries R&D InstituteEducationMSc. Department of Metallurgical and Materials Engineering, METUBSc. Department of Metallurgical and Materials Engineering, METU

Klappentext

The effect of different aging treatments on fatigue crack growth behavior ofAA6013 aluminum alloy was investigated. C(T) (Compact Tension) specimenswere prepared in L-T and T-L direction for fatigue crack growth tests. Sampleswere in T651 as received, T42 which is solution heat treated at 538 ºC for 90minutes, water quenched and aged in room temperature for 96 hours, and onegroup of samples were overaged at 245 ºC for 12 hours after T42 condition wasachieved. Hardness and conductivity measurements were achieved for allconditions after the heat treatments.Fatigue crack growth tests were performed at as received condition T651, T42and 245 ºC aged samples in laboratory air with sinusoidal loading of stress ratioR=0.1 and at a frequency of 1 Hz. The highest fatigue crack growth resistance isobserved for T651 T-L and 245 ºC overaged L-T condition.