mtex examples with data

I have been doing a bit of play using mtex to look at some EBSD data which I previous exported to .ctf format. mtex is an open source (GPL) software, which written for the commercial matlab software. The mtex package comes along with several examples and tutorials which can be read within matlab or over the http-internet-web.

Example scripts for using mtex are also available to download from the recently published paper “On Three-Dimensional Misorientation Spaces” by Krakow etal. published in Proceedings of the Royal Society A, 473, 2017.

Scripts and EBSD data for the case studies in the paper are available here:

https://www.repository.cam.ac.uk/handle/1810/263510

Scripts for producing other figures in the paper (explaining orientation relations etc.) are available from the mtex website here (along with other examples):

https://mtex-toolbox.github.io/publications.html

Screenshot from 2018-06-11 19-56-55

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Control of texture in materials using mtex /matlab at Sandvik

Dr Claes Olsson from Sandvik AB’s Materials Technology division explained at the Matlab expo 2016 how Sandvik has used the MTEX toolbox for analyzing and modeling crystallographic textures by means of pole figure and EBSD data. The software has been integrated into the work of the Materials Technology division allowing an auditable methodology for quality control, meeting standards to supply to their nuclear customers (e.g. in case of rolling zircalloy with controlled texture). Initial example of use was with pole figure data collected with a diffractometer, but they have also used the software to analyse EBSD data.
Screenshot from 2018-06-07 19-42-12
A video of the presentation can be seen here:
Screenshot from 2018-06-07 19-39-32
Slides can be found here:
Mtex is a free toolbox released under the GNU GPL 2, which works inside the commercially available matlab environment.

Tools for visualisation of citation networks – looking at Bainite literature

VOSviewer and CiteNetExplorer are a couple of tools for analysing and visualising patterns in scientific literature. These tools are freely available to use and distribute java programs (working on Windows, MacOS and Linux for example) written by researchers at Leiden University.

To get going, first we do a search on web of science, then download data as a list of “Full Record and Cited References” as a Tab-delimited file, in blocks of 500 entries (manually select to download record 1-500, 501-1000, etc. Then these files can be opened in both VOSviewer and CiteNetExplorer. For example I conducted a search on the topic “Bainite”.

Now we have beautiful graphs that identify key papers in a field.

Criteria for weighting the links in the network, or grouping the publications, and how to represent the results can all be changed depending on the data being explored.

Relativity accessible?

Who best to explain theory of relativity? Now that we can measure gravitational waves, it looks like this theory has a look in?

Any how, I stumbled on this book by Albert Einstein which is in public domain, last time I checked it was available as html, text and something called “MS Word Document” — whatever that means. The book “Relativity : the Special and General Theory by Albert Einstein” is the famous paper which explained all this clever stuff.

Just checked back there and now you can download a TeX file from project Gutenberg. This is revolutionary, now you can produce a beautifully typeset document to peruse.

The TeX file seems to compile fine, I used pdflatex and got a few warnings, there where warnings about illegal character on saving the file, hope you can avoid these problems.

Anyway great news for Einstein fans, read his theory explained in his own words, or words he endorsed.

https://en.wikipedia.org/wiki/Relativity:_The_Special_and_the_General_Theory

Download TeX here:
http://www.gutenberg.org/ebooks/5001

Or you can probably find pdf for free, or pay 90p for kindle version. 🙂

Yummy Iron

This phase diagram is making me hungry for some reason… Fer Fondu sounds yummy.

Fer Fondu

Fer Fondu

Taken from International Association for Testing Materials, VIth Congress, New York, 1912, “The Nomenclature of the microstructure substances and structures of steel and cast iron”.

Papers Download Statistics from Elsevier: Effect of tempering upon the tensile properties of a nanostructured steel

Elsevier provides some statistics for my one of my papers.

The paper is also available here – on the phase transformations website.

Downloads from Elsevier is about 1/3 from China and 1/9 th from the UK.

 

Top countries Pct
China 34%
UK 11%
Germany 6%
USA 6%
Turkey 5%

 

Paper Download Statistics

Paper Download Statistics

 

Running on Straight Rails

Boffins in Austria have been studying railway tracks to better understand the residual stresses that result from straightening them during processing.

Roller straightening is the final step in production of the rails, after hot rolling is performed at around 1000&degree;C cooling (presumably with water spray) results in curvature of the rails. This varies depending on the rail geometry and cooling conditions.
Untitled

Results from finite element modelling, and measurement of stresses using the contour method and neutron diffraction were compared. The model matches the trends of the measurements in the vertical plane (possibly the mode important since it has the largest residual stresses). In the paper comparison of neutron results for triaxial stresses shows there are residual stresses in the plane perpendicular to the vertical through the rail tool, although these were not predicted by the FEM model.

Residual Stresses

Residual Stresses along vertical symmetry axis

References

  1. http://phys.org/news/2015-01-rails-straight.html#nRlv
  2. R. Kaiser, M. Stefenelli, T. Hatzenbichler, T. Antretter, J. Keckes and B. Buchmayr (2014) “Experimental characterization and modelling of triaxial residual stresses in straightened railway rails,” The Journal of Strain Analysis for Engineering Design, 1-9 DOI: 10.1177/0309324714560040