Hello,

It is very difficult to distinquish between CDRX and GDRX using OIM data of final processed materials. This comes from the fact that GDRX can be categerozied as a type of CDRX mechanism. Both of them inherit the deformation texture components. However, if you can see the transition microstructure (between BM and final microstruture), you can do as follows. Calculate the point to point misoriention along the shear or deformation bands inside the transition area. If the misorientations are low from point to point (lower than 15 degree), it means that GDRX is governing the grain structure formation. ...

I have used this method in my papers. You may use them as fallows:

1)

Heidarzadeh A, Saeid T, Klemm V, Chabok A, Pei Y. Effect of stacking fault energy on the restoration mechanisms and mechanical properties of friction stir welded copper alloys. Materials & Design. 2019 Jan 15;162:185-97.

2)

Heidarzadeh A, Saeid T, Klemm V. Microstructure, texture, and mechanical properties of friction stir welded commercial brass alloy. Materials Characterization. 2016 Sep 1;119:84-91.

Article A review of dynamic recrystallization phenomena in metallic materials

Dear Shokouh Attarilar Madam,

10.1557/jmr.2013.201

Quantifying the progression of dynamic recrystallization in severe shear deformation at high strain rates

Sepideh Abolghasem, Saurabh Basu, M. Ravi Shankar

Akbar Heidarzadeh thanks for your helpful comment, I I have seen your valuable articles. I also wonder that the new GDRXed grains have the same orientation with the mother grain or not? since I see a lot of new grains with same color (same orientation) around the grain boundary of mother grain.

Also thanks to Krishnan Raja and Ebenezer Jacob Dhas D.S.

The GDRX grains will not have the orientation of the base material, however they usually inherit the deformation texture of the deformed material.

Akbar Heidarzadeh A billion thanks for your kind reply.