MEASUREMENT OF THE MECHANICAL STATE OF SUBSURFACE LAYERS BY EDDY-CURRENT METHOD |
|---|
| V. Augutis, R. Ramanauskas, V.Vasauskas |
- Abstract:
- Methods of structural strength and lifetime control for short and safe components are traditionally based on the most structural and functional materials. Mechanical tests do not give a reliable data because of inconsistency of wear and fracture mechanism of specimens and real structural members. For the structural members the essential charges of anisotropy (texture) of the initial material occur after various technological operations. Because of this it is necessary to develop nondestructive methods of structure control of structural members under loading directly in technological process, that subjects components to a 100% test (i.e. testing of all items) and which can guarantee their safety. The determination of Young’s modulus (E), hardness (H), and strain hardening exponent (n) by means of indentation experiments can be successfully achieved by establishing the relation between the bulk tensile response of a material and the local indentation test. The uses of indentation tests are also relevant of the structural integrity assessments of components, where tensile specimens may not be readily available. Alternative methods are required; therefore we turn to nondestructive methods directly applied to the structure number, such as eddy-current technique. The objective of the study was to determinate and quantify the changes in the magnetic and mechanical properties in the layers of microstructure after quenching, the hardening depth and surface hardness using CS-pulsed eddy current technique, and to correlate them with technological parameters.
- Download:
- PWC-2003-TC5-012.pdf
- DOI:
- -
- Event details
- Event name:
- XVII IMEKO World Congress
- Title:
Metrology in the 3rd Millennium
- Place:
- Dubrovnik, CROATIA
- Time:
- 22 June 2003 - 28 June 2003