Thermal shock tests for refractory metals

P. A. Hahn, P. Reithmayr, N. Rinke, Ivica Smid, G. Vees, A. Penz, D. Schuöcker, P. Rödhammer, M. Witwer

Research output: Contribution to journalArticle

Abstract

The major aim of the present investigation was to establish a standard test procedure applicable to refractory metals for the evaluation of thermal shock behaviour. Powder metallurgy processed flat specimens of W, Mo and Ta were subjected to the beam of a 10 kW carbon dioxide laser. Both pulsed and continuous modes of the laser were applied to create single spots as well as straight line traces. The heat treated specimens were then characterized in terms of their microstructural changes and mechanical strength. Thermal shock induced cracks were investigated by conventional metallography and scanning electron microscopy. In W and Mo, grain size growth has been observed even at moderate thermal loads, whereas the microstructure of Ta remained unaffected up to the highest levels. In bending tests, W exhibits a dramatic thermal shock failure, whereas Mo partially, and Ta completely, retain their mechanical strength.

Original languageEnglish (US)
Pages (from-to)269-282
Number of pages14
JournalInternational Journal of Refractory Metals and Hard Materials
Volume12
Issue number5
DOIs
StatePublished - Jan 1 1993

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Refractory metals
Thermal shock
Strength of materials
Carbon dioxide lasers
Metallography
Bending tests
Powder metallurgy
Thermal load
Laser modes
Cracks
Microstructure
Scanning electron microscopy
Lasers

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Hahn, P. A., Reithmayr, P., Rinke, N., Smid, I., Vees, G., Penz, A., ... Witwer, M. (1993). Thermal shock tests for refractory metals. International Journal of Refractory Metals and Hard Materials, 12(5), 269-282. https://doi.org/10.1016/0263-4368(93)90035-E
Hahn, P. A. ; Reithmayr, P. ; Rinke, N. ; Smid, Ivica ; Vees, G. ; Penz, A. ; Schuöcker, D. ; Rödhammer, P. ; Witwer, M. / Thermal shock tests for refractory metals. In: International Journal of Refractory Metals and Hard Materials. 1993 ; Vol. 12, No. 5. pp. 269-282.
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Hahn, PA, Reithmayr, P, Rinke, N, Smid, I, Vees, G, Penz, A, Schuöcker, D, Rödhammer, P & Witwer, M 1993, 'Thermal shock tests for refractory metals', International Journal of Refractory Metals and Hard Materials, vol. 12, no. 5, pp. 269-282. https://doi.org/10.1016/0263-4368(93)90035-E

Thermal shock tests for refractory metals. / Hahn, P. A.; Reithmayr, P.; Rinke, N.; Smid, Ivica; Vees, G.; Penz, A.; Schuöcker, D.; Rödhammer, P.; Witwer, M.

In: International Journal of Refractory Metals and Hard Materials, Vol. 12, No. 5, 01.01.1993, p. 269-282.

Research output: Contribution to journalArticle

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