It is the examination of the etched or non-etched test sample with the naked eye or with a small magnification (up to 50X).
The following features can be examined with Macro Analysis.
- Cracks in the examined area
- Gaps, ruins
- Heat affected zone in welded joining
- Welding passes
- The way the welded material is joined
- Lack of melting and penetration in welded joints
- Geometric shape of the weld