Study of subsurface initiation mechanism for white etching crack formation

Research output: Contribution to journalJournal article – Annual report year: 2016Researchpeer-review

Without internal affiliation

  • Author: Diederichs, Annika Martina

    RWTH Aachen University

  • Author: Barteldes, Soeren

    QASS GmbH, Germany

  • Author: Schwedt, Alexander

    RWTH Aachen University, Germany

  • Author: Mayer, Joachim

    RWTH Aachen University, Germany

  • Author: Holweger, Walter

    Schaeffler Technologies AG, Germany

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The present paper describes a novel way to detect early stages in the gradual transformation of SAE 52100 bearing steel material to white etching cracks (WEC). The underlying transformation is recorded and investigated by a complementary use of Barkhausen noise measurements, ultrasonic measurements and scanning electron microscopy. While ultrasonic measurements can only be used to detect cracks in a failed component, the recently improved Barkhausen noise measurement technique can be used to detect possible early stages of microstructural transformation. A cross section from a region without ultrasonic signal but with a Barkhausen signal has been investigated by the use of scanning electron microscopes in order to reveal possible pre-stages of WEC formation. These findings support that WEC are locally initiated in subsurface regions. Within those modified regions, carbides start to dissolve in consequence of deformation accumulation, which has been identified as an early state of WEA microstructure formation.
Original languageEnglish
JournalMaterials Science and Technology
Issue number11
Pages (from-to)1170-1178
Number of pages9
Publication statusPublished - 2016
Externally publishedYes
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Materials Science (all), Condensed Matter Physics, Mechanics of Materials, Mechanical Engineering, Barkhausen noise, Bearing steel, Rolling contact fatigue, White etching area (WEA), White etching cracks (WEC), Acoustic noise measurement, Carbides, Cracks, Etching, Scanning electron microscopy, Signal detection, Ultrasonic applications, Ultrasonic measurement, Bearing steels, White etching areas, Crack detection, MATERIALS, METALLURGY, ROLLING-CONTACT FATIGUE, BEARING STEELS, HYDROGEN EMBRITTLEMENT, BALL-BEARINGS, BUTTERFLIES, FLAKING, STRESS, DAMAGE, AREA

ID: 128145108