The deformation behavior, mlcrostructure and mechanical properties of cast and extruded Mg-lMn-xNd (wt%) at temperatures between 50°C and 250°C

A. Chakkedath, J. Bohlen, S. Yi, D. Letzig, Z. Chen, C. J. Boehlert

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • 1 Citations

Abstract

The tensile deformation behavior of as-cast and cast-then- extruded Mg-1 Mn-1 Nd(wt%) and Mg-lMn-0.3Nd(wt%) alloys was studied by performing in-situ tests inside a SEM. A slip/twin trace analysis technique was used to identify the distribution of the deformation systems. Cast-then-extruded Mg-1 Mn-1Nd(wt%) exhibited superior elevated-temperature strength retention compared to cast-then-extruded Mg-1 Mn-0.3Nd(wt%). Basal slip and extension twinning were observed in the as-cast Mg-1 Mn- 1 Nd(wt%) and Mg-1 Mn-0.4Nd(wt%) alloys deformed at 50°C. In cast-then-extruded Mg-1 Mn-1Nd(wt%), basal slip, prismatic slip, and pyramidal slip were active at all temperatures. In cast-then-extruded Mg-lMn-0.3Nd(wt%), at lower temperatures, twinning dominated the deformation and no non-basal slip activity was observed. The extent of twinning decreased with increasing temperature and basal slip was the major deformation mode at 150-250°C in both cast-then-extruded materials. The estimated CRSS ratio of extension twinning with respect to basal slip in Mg- 1Mn-1Nd(wt%) was close to unity, suggesting that the addition of Nd results in an increase in the CRSS of basal slip.

LanguageEnglish (US)
Title of host publicationMagnesium Technology
PublisherMinerals, Metals and Materials Society
Pages109-114
Number of pages6
Volume2015-January
ISBN (Print)9781119082439
StatePublished - 2015
EventMagnesium Technology 2015 - TMS 2015 144th Annual Meeting and Exhibition - Orlando, United States
Duration: Mar 15 2015Mar 19 2015

Other

OtherMagnesium Technology 2015 - TMS 2015 144th Annual Meeting and Exhibition
CountryUnited States
CityOrlando
Period3/15/153/19/15

Profile

Twinning
Mechanical properties
Trace analysis
Temperature
Scanning electron microscopy

Keywords

  • Cast
  • Extruded
  • Lightweight alloys
  • Magnesium
  • Microstructure
  • Slip
  • Tensile
  • Texture
  • Twinning

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Chakkedath, A., Bohlen, J., Yi, S., Letzig, D., Chen, Z., & Boehlert, C. J. (2015). The deformation behavior, mlcrostructure and mechanical properties of cast and extruded Mg-lMn-xNd (wt%) at temperatures between 50°C and 250°C. In Magnesium Technology (Vol. 2015-January, pp. 109-114). Minerals, Metals and Materials Society.

The deformation behavior, mlcrostructure and mechanical properties of cast and extruded Mg-lMn-xNd (wt%) at temperatures between 50°C and 250°C. / Chakkedath, A.; Bohlen, J.; Yi, S.; Letzig, D.; Chen, Z.; Boehlert, C. J.

Magnesium Technology. Vol. 2015-January Minerals, Metals and Materials Society, 2015. p. 109-114.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chakkedath, A, Bohlen, J, Yi, S, Letzig, D, Chen, Z & Boehlert, CJ 2015, The deformation behavior, mlcrostructure and mechanical properties of cast and extruded Mg-lMn-xNd (wt%) at temperatures between 50°C and 250°C. in Magnesium Technology. vol. 2015-January, Minerals, Metals and Materials Society, pp. 109-114, Magnesium Technology 2015 - TMS 2015 144th Annual Meeting and Exhibition, Orlando, United States, 3/15/15.
Chakkedath A, Bohlen J, Yi S, Letzig D, Chen Z, Boehlert CJ. The deformation behavior, mlcrostructure and mechanical properties of cast and extruded Mg-lMn-xNd (wt%) at temperatures between 50°C and 250°C. In Magnesium Technology. Vol. 2015-January. Minerals, Metals and Materials Society. 2015. p. 109-114.
Chakkedath, A. ; Bohlen, J. ; Yi, S. ; Letzig, D. ; Chen, Z. ; Boehlert, C. J./ The deformation behavior, mlcrostructure and mechanical properties of cast and extruded Mg-lMn-xNd (wt%) at temperatures between 50°C and 250°C. Magnesium Technology. Vol. 2015-January Minerals, Metals and Materials Society, 2015. pp. 109-114
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abstract = "The tensile deformation behavior of as-cast and cast-then- extruded Mg-1 Mn-1 Nd(wt{\%}) and Mg-lMn-0.3Nd(wt{\%}) alloys was studied by performing in-situ tests inside a SEM. A slip/twin trace analysis technique was used to identify the distribution of the deformation systems. Cast-then-extruded Mg-1 Mn-1Nd(wt{\%}) exhibited superior elevated-temperature strength retention compared to cast-then-extruded Mg-1 Mn-0.3Nd(wt{\%}). Basal slip and extension twinning were observed in the as-cast Mg-1 Mn- 1 Nd(wt{\%}) and Mg-1 Mn-0.4Nd(wt{\%}) alloys deformed at 50°C. In cast-then-extruded Mg-1 Mn-1Nd(wt{\%}), basal slip, prismatic slip, and pyramidal slip were active at all temperatures. In cast-then-extruded Mg-lMn-0.3Nd(wt{\%}), at lower temperatures, twinning dominated the deformation and no non-basal slip activity was observed. The extent of twinning decreased with increasing temperature and basal slip was the major deformation mode at 150-250°C in both cast-then-extruded materials. The estimated CRSS ratio of extension twinning with respect to basal slip in Mg- 1Mn-1Nd(wt{\%}) was close to unity, suggesting that the addition of Nd results in an increase in the CRSS of basal slip.",
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AB - The tensile deformation behavior of as-cast and cast-then- extruded Mg-1 Mn-1 Nd(wt%) and Mg-lMn-0.3Nd(wt%) alloys was studied by performing in-situ tests inside a SEM. A slip/twin trace analysis technique was used to identify the distribution of the deformation systems. Cast-then-extruded Mg-1 Mn-1Nd(wt%) exhibited superior elevated-temperature strength retention compared to cast-then-extruded Mg-1 Mn-0.3Nd(wt%). Basal slip and extension twinning were observed in the as-cast Mg-1 Mn- 1 Nd(wt%) and Mg-1 Mn-0.4Nd(wt%) alloys deformed at 50°C. In cast-then-extruded Mg-1 Mn-1Nd(wt%), basal slip, prismatic slip, and pyramidal slip were active at all temperatures. In cast-then-extruded Mg-lMn-0.3Nd(wt%), at lower temperatures, twinning dominated the deformation and no non-basal slip activity was observed. The extent of twinning decreased with increasing temperature and basal slip was the major deformation mode at 150-250°C in both cast-then-extruded materials. The estimated CRSS ratio of extension twinning with respect to basal slip in Mg- 1Mn-1Nd(wt%) was close to unity, suggesting that the addition of Nd results in an increase in the CRSS of basal slip.

KW - Cast

KW - Extruded

KW - Lightweight alloys

KW - Magnesium

KW - Microstructure

KW - Slip

KW - Tensile

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