Cavitation during high-temperature deformation in Al-Mg alloys

Hiroyuki Toda, Zul Azri Bin Shamsudin, Kazuyuki Shimizu, Kentaro Uesugi, Akihisa Takeuchi, Yoshio Suzuki, Mitsuru Nakazawa, Yoshimitsu Aoki, Masakazu Kobayashi

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

It has recently been revealed that high-density pre-existing hydrogen micropores, formed during production processes, exhibit premature growth and coalescence under external loading at room temperature, thereby inducing ductile fracture. This process is incidentally supplemented by the well-established ductile fracture mechanism based on particle damage. It is reasonable to assume that the pre-existing hydrogen micropores may also contribute to damage evolution at high temperatures. In the present study, synchrotron X-ray microtomography was applied to the in situ observation of deformation and fracture in Al-Mg alloys at a high temperature. High-density hydrogen micropores were observed in the alloys. Flow localization controlled deformation through the mechanism of solute drag creep. A combined effect of grain boundary sliding and heterogeneous nucleation on particles was also confirmed to accelerate the growth of pre-existing hydrogen micropores and cavities. Although continuous nucleation occurred together with the growth of pre-existing hydrogen micropores, the effects of the pre-existing hydrogen micropores, especially those located on grain boundaries, were predominant in the overall damage evolution. It seemed likely that supersaturated hydrogen in the aluminum alloys might also make an appreciable contribution to cavitation during high-temperature loading.

Original languageEnglish
Pages (from-to)2403-2413
Number of pages11
JournalActa Materialia
Volume61
Issue number7
DOIs
Publication statusPublished - 2013 Apr

Fingerprint

Cavitation
Hydrogen
Ductile fracture
Temperature
Nucleation
Grain boundary sliding
Synchrotrons
Coalescence
Drag
Aluminum alloys
Creep
Grain boundaries
X rays

Keywords

  • Al-Mg alloy
  • Cavitation
  • High-temperature deformation
  • Hydrogen
  • X-ray tomography

ASJC Scopus subject areas

  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • Electronic, Optical and Magnetic Materials

Cite this

Toda, H., Shamsudin, Z. A. B., Shimizu, K., Uesugi, K., Takeuchi, A., Suzuki, Y., ... Kobayashi, M. (2013). Cavitation during high-temperature deformation in Al-Mg alloys. Acta Materialia, 61(7), 2403-2413. https://doi.org/10.1016/j.actamat.2013.01.012

Cavitation during high-temperature deformation in Al-Mg alloys. / Toda, Hiroyuki; Shamsudin, Zul Azri Bin; Shimizu, Kazuyuki; Uesugi, Kentaro; Takeuchi, Akihisa; Suzuki, Yoshio; Nakazawa, Mitsuru; Aoki, Yoshimitsu; Kobayashi, Masakazu.

In: Acta Materialia, Vol. 61, No. 7, 04.2013, p. 2403-2413.

Research output: Contribution to journalArticle

Toda, H, Shamsudin, ZAB, Shimizu, K, Uesugi, K, Takeuchi, A, Suzuki, Y, Nakazawa, M, Aoki, Y & Kobayashi, M 2013, 'Cavitation during high-temperature deformation in Al-Mg alloys', Acta Materialia, vol. 61, no. 7, pp. 2403-2413. https://doi.org/10.1016/j.actamat.2013.01.012
Toda H, Shamsudin ZAB, Shimizu K, Uesugi K, Takeuchi A, Suzuki Y et al. Cavitation during high-temperature deformation in Al-Mg alloys. Acta Materialia. 2013 Apr;61(7):2403-2413. https://doi.org/10.1016/j.actamat.2013.01.012
Toda, Hiroyuki ; Shamsudin, Zul Azri Bin ; Shimizu, Kazuyuki ; Uesugi, Kentaro ; Takeuchi, Akihisa ; Suzuki, Yoshio ; Nakazawa, Mitsuru ; Aoki, Yoshimitsu ; Kobayashi, Masakazu. / Cavitation during high-temperature deformation in Al-Mg alloys. In: Acta Materialia. 2013 ; Vol. 61, No. 7. pp. 2403-2413.
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