**5. Conclusions**

The tightening of the requirements regarding the reliability of the structure creates the necessity for frequent inspections that will detect not only existing defects but also any changes that may indicate their occurrence. One such change is the residual stress distribution.

Several nondestructive testing methods can detect residual stress distribution and material changes due to stress. The authors assumed that it is also possible to analyze changes in the prerecorded magnetization of the tested element. Experiments have verified this, and the article proposes a Magnetic Recording Method that opens up new possibilities for monitoring critical structural elements.

Based on the results of the research conducted so far, it can be concluded that:


Despite the satisfactory initial test results, more research is needed to identify the method s strengths and weaknesses and improve the testing process. It is planned to test other magnetization methods (e.g., using recording heads) to examine objects without a flat surface. Plans are underway to analyze the measured two-dimensional signals and utilize chosen statistics features to develop more criteria for the material condition assessments. An experiment will also be carried out to assess the effect of the passage of a long time period (over one year) on the sample s magnetization state.

**Author Contributions:** Idea for the MRM method, T.C.; manuscript conceptualization, T.C., R.D.Ł., K.G. and M.J.Z.; implementation of the method, T.C. and R.D.Ł.; software preparation, R.D.Ł.; ˙ resources—transducer and system elements, T.C.; designed and conducted the experiment in part concerning the incremental deformation of steel samples, K.G. and M.J.Z.; magnetic measurements, ˙ T.C. and R.D.Ł.; data curation, R.D.Ł.; data analysis in the scope related to the mechanical properties of carbon structural steels, K.G. and M.J.Z.; writing—original draft preparation, R.D.Ł.; writing— ˙ correction and extensive editing, T.C., R.D.Ł., K.G. and M.J.Z.; visualization, R.D.Ł.; supervision, T.C. ˙ All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author. The data are not publicly available due to a complicated structure that requires additional explanation.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
