Demagnetization process in NDT
Tracks
NDT Methods
| Wednesday, October 23, 2024 |
| 11:30 AM - 12:00 PM |
| 209/210 - Technical Session |
Details
The time and money consuming process called "Demagnetization" is a very important but also very demanding part of NDT (typically before and after MPI or ET). Unfortunately, in addition to all the physical difficulties associated with the demagnetization of various parts to a very low, required value of residual magnetism, there are other problems resulting from many not entirely clear definitions of demagnetization, and the interpretation of their requirements can be different. This usually leads to large investments in special equipment and long discussions with customers and auditors, e.g. about input residual magnetism before and after MPI, about measuring devices, about the location and orientation of the measuring probe on the part, about the influence of the environment in the measurement spaces, or about the orientation of the part to the earth's magnetic pole. In our presentation, we will focus on all the items that, in my opinion, should be more precisely and clearly defined, and we will explain what the required values actually mean, how to measure residual magnetism on workpieces, and also how to demagnetize as efficiently and stably as possible.
Speaker
Ondřej Doubek
Sales Director
ATG - Advanced Technology Group
Demagnetization process in NDT
Presentation Description
The time and money consuming process called "Demagnetization" is a very important but also very demanding part of NDT (typically before and after MPI or ET). Unfortunately, in addition to all the physical difficulties associated with the demagnetization of various parts to a very low, required value of residual magnetism, there are other problems resulting from many not entirely clear definitions of demagnetization, and the interpretation of their requirements can be different. This usually leads to large investments in special equipment and long discussions with customers and auditors, e.g. about input residual magnetism before and after MPI, about measuring devices, about the location and orientation of the measuring probe on the part, about the influence of the environment in the measurement spaces, or about the orientation of the part to the earth's magnetic pole. In our presentation, we will focus on all the items that, in my opinion, should be more precisely and clearly defined, and we will explain what the required values actually mean, how to measure residual magnetism on workpieces, and also how to demagnetize as efficiently and stably as possible.
Biography
More than 22 years of experiences in development and production of various NDT equipment and systems for worldwide industrial leaders. Main foucese pn MPI, FPI, UT, ET and Automatic Defect Recognition.
