Acoustic emissions during tensile test of DC06 and HCT600X |
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Authors: | BA Behrens S Hübner K Wölki |
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Affiliation: | Leibniz Universit?t Hannover, Institut für Umformtechnik und Umformmaschinen /Institute of Forming Technology and Machines (IFUM), An der Universit?t 2, 30823 GARBSEN, FEDERAL REPUBLIC OF GERMANY |
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Abstract: | In this paper the acoustic emission behaviour during tensile tests of the materials DC06 and HCT600X is studied. Two steels with different characteristics (mild deep‐drawing steel DC06 and high‐strength steel HCT600X) are consciously chosen to show the influence of the material properties on the generated acoustic emissions. The acoustic emission behaviour and the corresponding signals differ clearly from each other. In addition, the effect of the strain rate as well as the rolling direction (0°, 90°) on the acoustic emission behaviour is investigated. Both parameters have a significant influence on the resulting acoustic emissions during tensile deformation. Furthermore, a new criterion based on the acoustic emission parameter FCOG (centroid frequency) for detection of damage beginning in dual‐phase steels is developed. The criterion supports the assumption that during tensile deformation of dual‐phase steels two failure mechanisms, ferrite/martensite interface decohesion and martensite phase fracture, exist. |
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Keywords: | Mild steel high-strength steel dual-phase steel tensile test acoustic emission Tiefziehstahl hö herfester Stahl Dualphasenstahl Zugversuch Schallemission |
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