where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

YXLON Copenhagen
YXLON Copenhagen is a highly specialized, award winning Danish company with 60 years of experience in portable X-ray solutions for industrial NDT.

459 views
Technical Discussions
Elmar van den Elzen
Elmar van den Elzen
06:17 Jan-12-2000
magnetism in steel

Dear Sirs,

For a customer we inspect steel rolls (3% chrome) for cold rolling steel strip. In the heavily stessed zones of the roll, where the roll material has probably been deformed, magnetism is introduced. This magnetism is finely distributed and the magnetism extends at least several millimeters into the roll body.

We would like to know the cause of this effect.
- Could magnetism be introduced into steel by local deformation?
- Or is it likely that an external magnetic field can be 'frozen' into the material by deformation?

We would appreciate any help to understand this fenomenon or hear from any cases with similar effects observed.

Thank you,
Lismar Engineering,
Elmar van den Elzen



    
 
 Reply 
 
Jens Forker
Jens Forker
07:00 Jan-12-2000
Re: magnetism in steel
: We would like to know the cause of this effect.
: - Could magnetism be introduced into steel by local deformation?
: - Or is it likely that an external magnetic field can be 'frozen' into the material by deformation?

<<


    
 
 Reply 
 
Thomas David Koble
Thomas David Koble
02:39 Feb-01-2000
Re: magnetism in steel
Dear Elamr,

knowing the chrome content, I suppose that the steel is a ferromagnetic material.

It is well known that magnetostriction occures in ferromagnetic materials.
This means that the shape and length of the matrial changes if the magnetization changes and vice versa.
From my point of view this is what you are observing.

For more infromation please look for articles on:
magnetostriction, magnetomechanical effect, magnetoelastic effect
(different names for the same physical effect !)

Best regards

Dag

Thomas


: Dear Sirs,

: For a customer we inspect steel rolls (3% chrome) for cold rolling steel strip. In the heavily stessed zones of the roll, where the roll material has probably been deformed, magnetism is introduced. This magnetism is finely distributed and the magnetism extends at least several millimeters into the roll body.

: We would like to know the cause of this effect.
: - Could magnetism be introduced into steel by local deformation?
: - Or is it likelythat an external magnetic field can be 'frozen' into the material by deformation?

: We would appreciate any help to understand this fenomenon or hear from any cases with similar effects observed.

: Thank you,
: Lismar Engineering,
: Elmar van den Elzen





    
 
 Reply 
 

Product Spotlight

NDT.net launches mobile-friendly design

NDT.net has revamped its website providing a mobile-friendly design.The front page received a comp
...
letely new design and all other sections are now reacting responsively on mobile devices. This has been a major step to make our website more user- friendly.
>

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

Teletest Focus+

Teletest Focus+ electronics have superior capabilities than rivals on the market. Beyond the usual
...
test features, Focus+ has 24 transmit channels and 24 receive channels, with an additional on-board switching capabilities. The instrument's frequency range is 10–300 kHz.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window