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Industrial applications of 3MA - Micromagnetic multiparameter microstructure and stress analysis

: Dobmann, G.; Altpeter, I.; Wolter, B.; Kern, R.

Fulltext urn:nbn:de:0011-n-751515 (178 KByte PDF)
MD5 Fingerprint: 8bbbc96ab039026488998e63e83f23ad
Created on: 11.7.2008

Romanian Welding Society:
Testing & Risk Assessment in the Development of Advanced Materials and Joints : 5th International Conference Structural Integrity of Welded Structures, ISCS 2007; Timisoara, Romania, 20 - 21 Nov. 2007
Timisoara, 2008
7 pp.
International Conference on Structural Integrity of Welded Structures (ISCS) <5, 2007, Timisoara>
Conference Paper, Electronic Publication
Fraunhofer IZFP ()
micromagnetic NDE; hardness; hardening depth; residual stresses; strength; steel industries; steel sheets; heavy plates; machinery building; automotive

Micromagnetic NDT techniques like the measurement of the magnetic Barkhausen noise, the incremental permeability and the harmonic analysis of the tangential magnetic field allow deriving inspection procedures to online monitoring and control machinery parts and components in production processes in order to characterize mechanical properties like hardness, hardening depth, yield and tensile strength.
These types of inspection procedures continuously were further developed in the last two decades so that today the second generation of system hard and software is in industrial use. The application is in steel industry where steel sheets in hot-dip-galvanizing lines were annealed after cold rolling but also in heavy plate rolling mills where after thermo-mechanical rolling special textures and texture gradients can occur.
An increasing number of applications are also to find in the machinery building industry and here especially in case of machinery parts of the car supplying industry. Besides mechanical hardness determination the measurement of residual stresses and the detection of in-homogeneities in the surface of machined parts is an inspection task. In different case studies the advantage to implement a micromagnetic NDE technique into the industrial processes is discussed.