Thermal and mechanical treatments are available to relieve the residual stresses.

Distortion is the unexpected, uneven change in size or shape caused by dissimilarities in manufacturing and heat treatment processes.

Residual stresses are induced during the machining due to mechanical, thermal or chemical factors. They may lead to lower fatigue life hence they should be analyzed and controlled.

Independent of external loads, there are internal stresses inside structures and materials. These stresses are called residual stresses.

Grinding is a chip-forming process which requires high energy to remove material to specified dimensions. The high energy, in return, generates heat which is created by the interactions of the grinding wheel with the workpiece.

Stresstech is a world leader in developing and manufacturing non-destructive inspection equipment for grinding burn detection and residual stress measurement.

Grinding thermal damages, also known as grinding burns, will shorten the fatigue life and can cause severe failures in dynamically loaded, critical components.

Combined with dimensional inspection, hardness tests and periodic metallographic analysis, the Barkhausen noise analysis method can help close the loop on insuring product quality.

Barkhausen noise gives information from the surface and very close area beneath the surface.

Barkhausen Noise Analysis (BNA) is based on a concept of inductive measurement of a noise-like signal, generated when a magnetic field is applied to a ferromagnet.