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Nondestructive residual stress- and hardness-evaluation at weldments by means of 3MA. Micromagnetic- multiparameter-, microstructure- and stress-analysis

: Dobmann, G.; Reimringer, B.; Theiner, W.

Weld Quality. The Role of Computers
Oxford: Pergamon Press, 1988
International Conference on Improved Weldment Control with Special Reference to Computer Technology <1988, Wien>
Fraunhofer IZFP ()
3MA-prototype; hardness; magnetoelastic; micromagnetic; nondestructive testing; residual stress

As far as magnetic materials are to be tested 3MA is a strong nde-tool for microstructure and residual stress characterization. Measuring quantities are the magnetic Barkhausen noise, the incremental permeability and the dynamic magnetostriction as function of a dynamical magnetization. Because all quantities are multi-dependent of microstructure and stress a computer sided multiparameter-evaluation is needed and used to separate the influence. The contribution reports applications and experiences at weldments with the 3MA-prototype which is a micro-processor controlled equipment. (IZFP)