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Questions related from Rohit Mathew
Some metals/alloys show a static recrystallisation texture close to that of the deformation one. These are usually not expected due to the oriented nucleation and oriented growth theories which...
10 October 2016 4,351 3 View
I am trying to perform tensile testing of a bulk copper box. But when I plot the results of the test, I get a slight curve in the elastic region of the stress-strain plot. Is this normal? Also I...
02 February 2016 2,400 6 View
I have tried a lot a literature regarding pulsed electrodeposition of copper to obtain nanotwinned microstructures. But all of these sheets (or foils) are limited in thickness (less than 50...
02 February 2016 4,257 0 View
Does Polyethlylene Glycol absorb water when exposed to air in room conditions? Is it possible to remove the absorbed water by simple heating?
01 January 2016 973 7 View
If I have a deformed specimen and I used wire EDM cutting to cut the material into samples of different thicknesses. Assuming the HAZ from the EDM wire cutting is removed, if I were to heat treat...
11 November 2015 5,983 17 View
I would like to know how to create twin boundaries (code it) in a metal using lammps. I am try to simulate the effects of twin boundaries in strenthening of copper so I require twins in initial...
10 October 2015 5,356 11 View
I would like to know what precautions one should take while performing tensile testing in LAMMPS. For example; tensile testing of Copper. I would like to perform the test at room temperature...
10 October 2015 3,226 7 View
In copper we observe annealing twins, growth twins or deformation twins regularly based on the processing history. Is it possible to process copper such that the twins are not nucleated or the...
09 September 2015 194 1 View
In metals if we say a boundary is coherent, it is understood that the atoms on either side of the boundary have a one-to-one matching bonds on the other side and for incoherent boundaries all...
08 August 2015 9,273 16 View
It is seen in literature that Sigma-3 CSL boundaries are usually taken as twin boundaries and more importantly coherent twin boundaries. I am asking this since I am getting significantly...
07 July 2015 9,759 11 View
I have tried electropolishing and normal etching using various acidic solutions quoted in literature but it did not work. Please suggest some etchants and electropolishing solutions for me to try.
06 June 2015 5,596 6 View
OFHC Copper rolled at room temperature (in as rolled condition) showed presence of twins in the microstructure. Is there a method by EBSD or other to identify which type of twin these are?...
03 March 2015 5,398 9 View
I am trying to etch pure copper which has been well annealed and rolled. The FeCl3+HCl+Water solution, although gives good results it does not give clean optical microstructures. The rolled...
01 January 2015 8,355 4 View
From the literature I have read, I can understand that stacking fault energy is an intrinsic property of a material. But what I do not understand is the origin of SFE? The width of a stacking...
09 September 2014 7,995 12 View
These are the 3 major types of twinning in metals. I would like to know if there is any difference in terms of interface/boundary energy of these 3 types if I hypothetically have coherent...
08 August 2014 1,264 6 View
It is generally known that lower stacking fault energy materials promotes growth of annealing twins during recrystallisation. Why should stacking fault energy influence recrystallization behaviour...
05 May 2014 969 5 View
I know that annealing twins occur during heat treatment and deformation twins during plastic deformation, but what are the fundamental differences? Are there differences in their ability to...
05 May 2014 904 2 View
I would like to understand the behavior of initial dislocation density and grain boundaries and associated yield strength. I have read that radiation damage increases dislocation loops, so can a...
05 May 2014 2,414 2 View
I have read literature where the twinning deformation phenomena helps in increasing the ductility and strength of a material. But the explaination as to why this occurs is not explained clearly....
04 April 2014 6,145 6 View
The literature available and text books do not seem to explain which method(s) were used to establish the Stacking Fault Energies (SFE) of common materials. I am wondering if there is any standard...
02 February 2014 1,259 1 View
