Magnetic field induced martensite 4

Greenleader · Jan 20, 2005

I am not a metallurgist, so please be easy with the terms. I have a question; is magnetic field induced martensite, and strain induced martensite, different terms for the same process? Thanks, Gerald

metengr · Jan 21, 2005

Here is a web site to obtain several technical papers on this topic. Even as a metallurgist, I had to read the Abstracts twice to comprehend this information.

http://www.sendai.kopas.co.jp/METAL/PUBS/thesis_e/e_abst/41-08/index.html

Carburize · Jan 21, 2005

Whoa!! Heavy stuff but I think they answer your question.
It appears that they are not the same, the magnetic field induced transformation seems to be a reversible phenomenon in some shape memory alloys and only exists while the field is applied.Stain induced transformation is however not reversible and can occur in more conventional alloys.

metengr · Jan 21, 2005

As a side note to magnetic fields, I found this interesting technical presentation by our friends at Oak Ridge on the topic of "Ultrahigh Magnetic Field Processing of Materials for Developing Customized Microstructures and Enhanced Performance"

http://www.oit.doe.gov/imf/pdfs/revpres_10_ludtka.pdf

Greenleader · Jan 21, 2005

Much obliged, metenger!

I just discovered this topic, so I have a lot of reading to do. Thanks again, Jerry

mcguire · Jan 21, 2005

As meteng pointed out, there can be a transformation from austenite to martensite induced by applying a magnetic field which reverses with the removal of the field. The strain induced transformation requires significant plastic deformation and remains after the stress which imposed the strain is removed.

arunmrao · Jan 21, 2005

I learnt something new. Though this was vaguely in my memory that one transformation is reversible while the other is not. Great posting and equally good responses.

metman · Jan 22, 2005

Greenleader,

For more reading on the subject, the following link gives some practial applications of strain induced martensite:

forums/0001.htm

unclesyd · Jan 28, 2005

Not quite on topic but interesting. Take a look at the first set of papers.

http://www.gamf.hu/indexe.php?modul=research

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Magnetic field induced martensite 4

Greenleader

Aerospace

metengr

Materials

Carburize

Materials

metengr

Materials

Greenleader

Aerospace

mcguire

Materials

arunmrao

Materials

metman

Materials

unclesyd

Materials

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