Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium

N. V. Dudamell, P. Hidalgo-Manrique, A. Chakkedath, Z. Chen, C. J. Boehlert, F. Gálvez, S. Yi, J. Bohlen, D. Letzig, M. T. Pérez-Prado

Research output: Contribution to journalArticle

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Abstract

The mechanical behavior of an extruded magnesium-manganese alloy containing 1wt% of neodymium (MN11) has been investigated at temperatures ranging from room temperature to 400°C at both quasi-static and dynamic rates. Conventional ex-situ tests, carried out in compression along the extrusion axis (EA), have been combined with in-situ tests in a scanning electron microscope (SEM) in order to elucidate the effect of a rare earth (RE) addition on the dominant deformation mechanisms. An unusually large activity of twinning was observed at room temperature in a wide range of quasi-static rates. Furthermore, the twinning activity has been found to increase at temperatures around 250°C, where clear signs of dynamic strain aging (DSA) are also apparent. The enhanced twinning activity compared to conventional Mg alloys, not containing RE elements, is attributed to an increase in the critical resolved shear stress of basal slip (CRSSbasal) due to the presence of intermetallic RE-containing particles and to the Nd atoms in solid solution. The surprising decrease of the twinning activity at dynamic rates (~103s-1) may be explained by a decrease in the CRSSbasal as the intermetallic RE-containg particles and the Nd solid solution strengthening become less effective with increasing strain rate.

LanguageEnglish (US)
Pages220-231
Number of pages12
JournalMaterials Science and Engineering A
Volume583
DOIs
StatePublished - 2013

Profile

Neodymium
Twinning
neodymium
magnesium alloys
twinning
Magnesium alloys
strain rate
Strain rate
slip
rare earth elements
Rare earths
Intermetallics
intermetallics
Solid solutions
solid solutions
Rare earth additions
manganese alloys
Manganese alloys
Temperature
precipitation hardening

Keywords

  • Extrusion
  • Magnesium alloys
  • Mechanical behavior
  • Rare-earths
  • Slip
  • Twinning

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Dudamell, N. V., Hidalgo-Manrique, P., Chakkedath, A., Chen, Z., Boehlert, C. J., Gálvez, F., ... Pérez-Prado, M. T. (2013). Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. Materials Science and Engineering A, 583, 220-231. DOI: 10.1016/j.msea.2013.07.003

Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. / Dudamell, N. V.; Hidalgo-Manrique, P.; Chakkedath, A.; Chen, Z.; Boehlert, C. J.; Gálvez, F.; Yi, S.; Bohlen, J.; Letzig, D.; Pérez-Prado, M. T.

In: Materials Science and Engineering A, Vol. 583, 2013, p. 220-231.

Research output: Contribution to journalArticle

Dudamell, NV, Hidalgo-Manrique, P, Chakkedath, A, Chen, Z, Boehlert, CJ, Gálvez, F, Yi, S, Bohlen, J, Letzig, D & Pérez-Prado, MT 2013, 'Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium' Materials Science and Engineering A, vol 583, pp. 220-231. DOI: 10.1016/j.msea.2013.07.003
Dudamell NV, Hidalgo-Manrique P, Chakkedath A, Chen Z, Boehlert CJ, Gálvez F et al. Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. Materials Science and Engineering A. 2013;583:220-231. Available from, DOI: 10.1016/j.msea.2013.07.003
Dudamell, N. V. ; Hidalgo-Manrique, P. ; Chakkedath, A. ; Chen, Z. ; Boehlert, C. J. ; Gálvez, F. ; Yi, S. ; Bohlen, J. ; Letzig, D. ; Pérez-Prado, M. T./ Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. In: Materials Science and Engineering A. 2013 ; Vol. 583. pp. 220-231
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