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The paper gives an information overview and analysis of metal magnetic memory method for metal stress-strain state assessment. The object of this research is an alternative approach to the study of metal constructions by changing their magnetic parameters. The physical basis of the method is the magneto-elastic effect. The purpose of the paper is the analysis of new method and search for the prospects of its further development, as well as setting targets for further research. The paper is written in the form of an analytical overview. It considers and explains structural transformations in metals under elasto-plastic deformation. Also, the empirical dependence of magnetization on magneto-elastic strain in metals has been shown, stresses magnetization increase in elastic range, its slight reduction when transition to plastic deformation and the effect of residual magnetization after unloading have been explained. The mathematical models of the MMM method have been presented. The paper gives brief theoretical principles of the method and preliminary assessment of the level of useful signal. The prospects of the method for diagnosis of metal pre-defect stress state have been estimated. The task of further researches has been set, such as development of computer models for testing the method, diagnostic samples and designs. [ABSTRACT FROM AUTHOR]

The paper gives an information overview and analysis of metal magnetic memory method for metal stress-strain state assessment. The object of this research is an alternative approach to the study of metal constructions by changing their magnetic parameters. The physical basis of the method is the magneto-elastic effect. The purpose of the paper is the analysis of new method and search for the prospects of its further development, as well as setting targets for further research. The paper is written in the form of an analytical overview. It considers and explains structural transformations in metals under elasto-plastic deformation. Also, the empirical dependence of magnetization on magneto-elastic strain in metals has been shown, stresses magnetization increase in elastic range, its slight reduction when transition to plastic deformation and the effect of residual magnetization after unloading have been explained. The mathematical models of the MMM method have been presented. The paper gives brief theoretical principles of the method and preliminary assessment of the level of useful signal. The prospects of the method for diagnosis of metal pre-defect stress state have been estimated. The task of further researches has been set, such as development of computer models for testing the method, diagnostic samples and designs. [ABSTRACT FROM AUTHOR]