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Application of a high temperature chamber for X-ray stress analysis

Investigation of CVD coatings deposited on steel using a Ψ-diffractometer
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Published/Copyright: May 28, 2013
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Materials Testing
From the journal Materials Testing Volume 47 Issue 5

Abstract

The adhesion strength as well as the crack resistance of hard CVD coatings on cutting tools are widely influenced by the appertaining residual stress states. They are generated during cooling down from coating temperature, or during a subsequent heat treatment. To enhance the knowledge of the residual stress development in such CVD coatings on steels, X-ray residual stress analyses were performed during the cooling process. Therefore, a high temperature chamber for a Ψ-diffractometer was developed and manufactured. It allows X-ray residual stress analyses at temperatures of up to at least 1000°C using a measuring range of 2θ ≥ 94° at |Ψ| ≤ 60°.

Kurzfassung

Die Schichthaftung wie auch der Risswiderstand von harten CDV-Schichten auf Schneidwerkzeugen werden stark beeinflusst von den auftretenden Eigenspannungszuständen. Diese entstehen während des Abkühlens von der Beschichtungstemperatur oder bei einer anschließenden Wärmebehandlung. Um das Wissen über die Entstehung der Eigenspannungszustände in solchen CVD-Schichten auf Stählen zu erweitern, wurden röntgenographische Eigenspannungsanalysen während des Abkühlvorgangs durchgeführt. Hierfür wurde ein spezieller Spiegelofen für Ψ-Diffraktometer entwickelt und hergestellt. Er ermöglicht röntgenographische Eigenspannungsanalysen in einem Messbereich von 2θ ≥ 94° bei |Ψ| ≤ 60° und Temperaturen von mindestens 1000°C.

Dipl.-Phys. Michael H. Ott, born in 1968 in Heilbronn a.N. (Germany), studied Physics at the Ruprecht-Karls-Universität Heidelberg with a focus on applied physics. Afterwards he was a scientific assistant at the Institut für Werkstoffkunde I (Institute of Materials Science and Engineering I) at the Universität Karlsruhe (TH), where he worked between 1997 and 2003 on several scientific projects. Since January 2004 he has been employed at the Technologie-Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH as an innovation manager in the field of intellectual property and technology transfer between universities and industry.

Dr.-Ing. Andreas Kämpfe (born in 1972) studied mechanical engineering with the emphasis materials technology and technical mechanics at the Universities of Dresden, Karlsruhe and Denver. Subsequently, he was active as scientific assistant and temporary head of the X-ray-laboratory at the Institut für Werkstoffkunde I of the Universität Karlsruhe (TH), where he obtained a doctorate in 2001. At present he is manager of the test field and responsible for the durability and mechanical strength of metal bellows and metal hoses at the Witzenmann GmbH in Pforzheim, Germany.

Prof. Dr.-Ing. Detlef Löhe, born in 1949, studied mechanical engineering at the Universität Karlsruhe (TH), where he received his doctorate in 1980. In 1991, he was appointed Professor for materials science at the Universität Paderborn. In 1994, he came back to Karlsruhe to succeed Eckard Macherauch as head of the Institut für Werkstoffkunde I. He is head of the DGM expert committee “Materials behaviour under mechanical loading”, member of the Collaborative Research Centers SFB 483 and SFB/TR 10, speaker of the SFB 499 and Senator of the DFG. His research is focused on relationships between manufacturing processes, states and behaviour of materials and components with emphasis on the interactions of loading and residual stresses as well as mechanical and thermal strain.

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Published Online: 2013-05-28
Published in Print: 2005-05-01

© 2005, Carl Hanser Verlag, München

Articles in the same Issue

  1. Inhalt/Contents
  2. Inhalt
  3. Fachbeiträge/Technical Contributions
  4. Multiaxial fatigue – methods, hypotheses and applications
  5. Present limitations in the assessment of components under multiaxial service loading
  6. State-of-the-art and future trends in multiaxial fatigue assessment
  7. Notch stress and strain approximation procedures for application with multiaxial nonproportional loading
  8. Critical plane concept and energy approach in multiaxial fatigue
  9. Schrauben aus hochfesten Aluminiumlegierungen*
  10. Application of a high temperature chamber for X-ray stress analysis
  11. Vorschau/Preview
  12. Vorschau
https://doi.org/10.3139/120.100658

Articles in the same Issue

  1. Inhalt/Contents
  2. Inhalt
  3. Fachbeiträge/Technical Contributions
  4. Multiaxial fatigue – methods, hypotheses and applications
  5. Present limitations in the assessment of components under multiaxial service loading
  6. State-of-the-art and future trends in multiaxial fatigue assessment
  7. Notch stress and strain approximation procedures for application with multiaxial nonproportional loading
  8. Critical plane concept and energy approach in multiaxial fatigue
  9. Schrauben aus hochfesten Aluminiumlegierungen*
  10. Application of a high temperature chamber for X-ray stress analysis
  11. Vorschau/Preview
  12. Vorschau
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