Abstract
The residual stress state of a mechanical component is an important factor in its production planning and in estimates of its lifecycle since it can be responsible for geometric distortions and degradation of fatigue properties. Therefore, the development of reliable methods for non-destructively quantifying these stresses remains in the interest of most manufacturing industries; Barkhausen magnetic noise measurements have been investigated in several applications and remains a viable option. However, its effective implementation has occurred mostly in components with simple geometries and insignificant microstructural gradients; even in these cases, successful industrial adoption of the method depends on previous calibration with samples that are often difficult and costly to prepare and validate. This work aims at investigating the capability of the method of characterizing the residual stress state in a simple but generally useful application: samples of hot-rolled steel sheets collected at two different stages of processing in an industrial mechanical conformation and heat treatment plant. In this analysis Barkhausen noise measurements were compared to X-ray diffraction results, and statistical analysis tools were used to correlate the results.
Highlights
There is a consensus among researchers that no and magnetostriction effects[4]
A number of methods aimed at inspecting and quantifying material. When such a material is subjected to a mechanical residual stress levels non-destructively have been proposed; load its magnetic domains will reorientate, and, in the case many of these are based on measurements of electromagnetic of ferrous alloys, align themselves in the direction of an properties[3,4,5], Barkhausen noise measurements being recognized imposed uniaxial stress[5]
This work aims at verifying the viability of the use of Barkhausen noise measurements to analyze residual stresses in 42CrMo4 steel hot-rolled sheets, under different microstructural conditions
Summary
There is a consensus among researchers that no and magnetostriction effects[4] Once calibrated, it can be mechanical component is free from residual stresses[1], since used to inspect a large number of components in a fast and these are introduced in the object every time a process reliable way, being ideal for production line quality causes temperature, deformation, or phase transformation control. The calibration procedure is usually the gradients Fabrication processes such as mechanical most time-consuming part of the inspection, because the conformation or heat treatment can lead to significant levels operator needs to produce standards which isolate the effect of residual stresses that in their turn can lead to premature being sought in the real component from other influences. As the stress state becomes more as one of the most promising alternatives
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