Is there any technique to minimise the residual stresses in a plate without heating the sample?

20 February 2018 1 10K Report

I have a 30 mm thick plate AA7050 alloy and I want to reduce the residual stresses without altering the microstructure; so I cannot heat up the specimen. What techniques are out there? Is it possible for 30 mm block or it's too thick?

Enrico Salvati

Dear Panos,

you may want to consider using of the Vibratory Stress Relief (VSR) technique. According to the relevant literature, this method is able to modify the residual stress magnitude and, in some cases, improve the fatigue performance of the material.

Here's a couple of references:

Article Texture Evolution and Residual Stress Relaxation in a Cold-R...

Article Fatigue life of 7075-T651 aluminium alloy treated with vibra...

Hope this helps

Regards,

Enrico

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