Barkhausen noise analysis in practice: Hardness detection

Barkhausen noise analysis gives a response to the hardness state.

High hardness leads to low Barkhausen noise activity and low hardness to high Barkhausen noise activity.

In soft materials magnetic domains move more easily than in hard materials. In soft materials domain walls can make bigger jumps. In hard materials domain walls collide with dislocations, precipitations or other irregularities in the material structure.

Hardness is related to the number of pinning sites (e.g. dislocation density, phase content, etc.) in a material. Pinning sites also impede the movement of magnetic domain walls.

Barkhausen noise analysis can be easily used to separate soft and hard parts in heat treatment applications and it can be used for detecting grinding burns.

We provide Barkhausen noise inspection systems for a wide range of steel components in following automation levels:


Inline/Robot Systems

RoboScan is an automated grinding burn and heat treatment defect detection system that can be integrated into production line.

GearScan 500 and user

Automated systems

Automated systems for quality inspection are tailored for offline use. Easy to use software makes inspections intuitive and systems can adapt to various component types.

CrankScan 200 with user

Semi-Automated systems

Semi-automated and manual Barkhausen noise analysis systems are suitable for low volume measurements. The most simple Barkhausen noise measurements can be performed handheld with only a sensor and analyzer.

Barkhausen noise analysis with Rollscan 350 and general purpose sensor.

Manual systems

Manual Barkhausen noise stands are grinding burn and heat treatment defect detection systems for low-volume applications.