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

02 February 2018 1 8K 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

Badges
Science topic

More Panos Efthymiadis's questions See All

How can I import residual stress profiles into Deform?

Hi all, I want to import the residual stress profiles along the rolling and transverse direction into the Deform and also extrude those over the whole plate. Would you be able to point out how to...

10 November 2018 2,413 0 View

Does anyone know any supplier that could provide with TiB2 reinforced 7xxx alloys?

I am looking for thick-sectioned plates (of the order of 2000m x 500mm x 120.00mm thick)

01 February 2018 2,105 3 View

Why there is a preference for plotting IPF maps over Euler maps in EBSD?

I am inspecting some machined specimens and I noticed not all grains and misorientations can be seen in the 3 IPF maps; while Euler mapping reveals quite well both -even though there might be some...

31 December 2017 2,755 4 View

How can someone increase both the strength and deformability of a metallic alloy but at the same time achieve a high yield to UTS ratio?

In most cases, scientists design a low yield deformable matrix which strengthens via phase transformations, twinning etc. However in many engineering applications a low yield point is not desirable.

31 December 2016 6,447 3 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Should we change media after1st 6hrs after plating HUVEC bought from INVITROGEN?it's not recomended by invitrogen.Will DMSO present in stock matter?

We have HUVEC bought from Invitrogen. Cat no -C-003-5c. while first plating the cells we have bought the protocol suggests not to centrifuge the cell with media to remove the DMSO. Should we...

02 March 2021 3,713 2 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

Energy minimization in LAMMPS using NVT ?

How do I do energy minimization in lammps with NVT ensemble ? I am using the following command and it does not seem to work. It stops at extremely high energy and gives me the error zero search...

01 March 2021 2,294 3 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View