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Beryllium – A Challenge for Preparation and Mechanical Characterization

  • M. Siller , J. Kappacher , R. Rolli , H. Clemens and V. Maier-Kiener
Published/Copyright: September 23, 2019
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Practical Metallography
From the journal Practical Metallography Volume 56 Issue 10

Abstract

Beryllium has an extraordinary combination of material properties such as low density, high melting point, high specific heat capacity, high Young's modulus, high hardness and low atomic number.

The conventional investigation of the mechanical properties of Be and Be alloys is only possible under difficult conditions due to the material's toxicity and the resulting restrictions on sample manufacturing. These limitations are avoided, at least partly, when using a depth-sensing hardness test, also called nanoindentation, where the resulting contamination with Be dusts is limited to a controllable extent.

For this work, technically pure Be from X-ray exit windows of high-performance X-ray tubes was chosen and its mechanical properties were characterized by means of nanoindentation. This contribution will focus in detail on the preparation of the material as well as the following microstructural characterization by means of light microscopy and scanning electron microscopy. The mechanical results of local nanoindentation will be correlated with the microstructure and compared with known values found in the literature.

Kurzfassung

Beryllium besitzt eine außergewöhnliche Materialeigenschaftskombination aus niedriger Dichte, hohem Schmelzpunkt, hoher spezifischer Wärmekapazität, hohem Elastizitätsmodul, hoher Härte und niedriger Ordnungszahl.

Die konventionelle Untersuchung der mechanischen Eigenschaften von Be und Be-Legierungen ist, aufgrund der durch die Toxizität bedingten Einschränkungen der Probenfertigung, nur unter erschwerten Bedingungen möglich. Mittels tiefenregistrierender Härteprüfung, auch Nanoindentation, lässt sich dieser Aufwand zumindest teilweise umgehen und die anfallende Kontamination mit Be-Stäuben in einem kontrollierbaren Rahmen halten.

In dieser Arbeit wurde technisch reines Be aus Röntgenaustrittsfenstern von Hochleistungsröntgenröhren gewählt und deren mechanische Eigenschaften mittels Nanoindentation charakterisiert. Dabei wird im Detail auf die Präparation des Materials sowie auf die nachfolgende Gefügecharakterisierung mittels Lichtmikroskop und Rasterelektronenmikroskop eingegangen. Die resultierenden mechanischen Ergebnisse der lokalen Nanoindentation werden mit der Mikrostruktur korreliert und mit vorhandenen Literaturwerten verglichen.

Übersetzung: V. Müller

References / Literatur

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Received: 2018-12-10
Accepted: 2019-03-25
Published Online: 2019-09-23
Published in Print: 2019-10-15

© 2019, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Beryllium – A Challenge for Preparation and Mechanical Characterization
  7. Investigations on Mechanical Strength and Microstructure of Multi-Pass Welded S690QL HSLA Steel Using MAG and FCAW
  8. High-Temperature Resistant and Gas-Tight Coatings for Long-Term Heat Treatments using the Example of α-Cu-Al-Zn
  9. Microbially Induced Pitting Corrosion on an Austenitic Stainless Steel Pipe
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
https://doi.org/10.3139/147.110572

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Beryllium – A Challenge for Preparation and Mechanical Characterization
  7. Investigations on Mechanical Strength and Microstructure of Multi-Pass Welded S690QL HSLA Steel Using MAG and FCAW
  8. High-Temperature Resistant and Gas-Tight Coatings for Long-Term Heat Treatments using the Example of α-Cu-Al-Zn
  9. Microbially Induced Pitting Corrosion on an Austenitic Stainless Steel Pipe
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
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