Use of positron annihilation measurements to detect the defect beneath worn surface of stainless steel 1.4301 (EN) under dry sliding condition

Wear, Volumes 294–295, 30 July 2012, Pages 264-269
Jerzy Dryzek, Paweł Horodek, Mirosław Wrobel

Institute of Physics, Opole University, ul. Oleska 48, 45-052 Opole, Poland

Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342 Krakow, Poland

AGH University of Science and Technology, 30 Av. Mickiewicza, 30-059 Krakow, Poland

Abstract

Positron measurements were performed for detection of the subsurface zone in the stainless steel 1.4301 (EN) exposed to dry sliding. They revealed the defect profile induced by dry sliding which is extended inward the worn surface from 85 um to 400 um depending on the applied load during the tribo-test. This result was obtained using the positron techniques, while the microhardness profile exhibited shorter range of the microhardness depth profile, i.e., from 70 um to 150 um. However, at the depth of about 5 um from the worn surface the sudden increase in the microhardness was observed. The complementary measurements of X-ray diffraction and SEM micrographs of the worn surface were also performed.

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