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.

    Original 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

    Other

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

    Profile

    Temperature
    Twinning
    Trace analysis
    Mechanical properties
    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, 15-19 March.
    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. p. 109-114.

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

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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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    AU - Letzig,D.

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