• français
    • English
    English
  • Ouvrir une session
Aide
Voir le document 
  •   Accueil de SAM
  • Laboratoire Angevin de Mécanique, Procédés et InnovAtion (LAMPA)
  • Voir le document
  • Accueil de SAM
  • Laboratoire Angevin de Mécanique, Procédés et InnovAtion (LAMPA)
  • Voir le document
JavaScript is disabled for your browser. Some features of this site may not work without it.

Formation and annihilation of stressed deformation twins in magnesium

Article dans une revue avec comité de lecture
Auteur
LOUCA, Karim
318728 University of Western Ontario [UWO]
ABDOLVAND, Hamidreza
318728 University of Western Ontario [UWO]
ccMAREAU, Charles
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
MAJKUT, Marta
339765 European Synchrotron Radiation Facility [Grenoble] [ESRF]
WRIGHT, Jonathan
339765 European Synchrotron Radiation Facility [Grenoble] [ESRF]

URI
http://hdl.handle.net/10985/23024
DOI
10.1038/s43246-020-00105-y
Date
2021-01-13
Journal
Communications Materials

Résumé

The mechanical response of polycrystalline materials to an externally applied load and their in-service performance depend on the local load partitioning among the constituent crystals. In hexagonal close-packed polycrystals such load partitioning is significantly affected by deformation twinning. Here we report in-situ compression-tension experiments conducted on magnesium specimens to measure the evolution of grain resolved tensorial stresses and formation and annihilation of twins. More than 13000 grains and 1300 twin-parent pairs are studied individually using three-dimensional synchrotron X-ray diffraction. It is shown that at the early stages of plasticity, the axial stress in twins is higher than that of parents, yet twins relax with further loading. While a sign reversal is observed for the resolved shear stress (RSS) acting on the twin habit plane in the parent, the sign of RSS within the majority of twins stays unchanged until twin annihilation during the load reversal. The variations of measured average stresses across parents and twins are also investigated.

Fichier(s) constituant cette publication

Nom:
LAMPA_CMat_2021_MAREAU.pdf
Taille:
2.351Mo
Format:
PDF
Voir/Ouvrir
CC BY
Ce document est diffusé sous licence CC BY

Cette publication figure dans le(s) laboratoire(s) suivant(s)

  • Laboratoire Angevin de Mécanique, Procédés et InnovAtion (LAMPA)

Documents liés

Visualiser des documents liés par titre, auteur, créateur et sujet.

  • On the nucleation of deformation twins at the early stages of plasticity 
    Article dans une revue avec comité de lecture
    ABDOLVAND, Hamidreza; LOUCA, Karim; ccMAREAU, Charles; MAJKUT, Marta; WRIGHT, Jonathan (Elsevier BV, 2020-07-20)
    Understanding the deformation mechanisms of hexagonal close-packed (HCP) polycrystals at the grain scale is crucial for developing both macro and micro scale predictive models. Slip and twinning are the two main deformation ...
  • Experimental study of the impact of punching operations on the high cycle fatigue strength of Fe-Si thin sheets 
    Article dans une revue avec comité de lecture
    DEHMANI, Helmi; ccPALIN-LUC, Thierry; ccMAREAU, Charles; KOECHLIN, Samuel; ccBRUGGER, Charles (Elsevier, 2016)
    In this paper, the impact of punching operations on the high cycle fatigue strength of Fe–Si thin sheets is investigated. High cycle fatigue tests are performed on both punched and polished edge specimens. Results show a ...
  • High Cycle Fatigue Strength of Punched Thin Fe-Si Steel Sheets 
    Article dans une revue avec comité de lecture
    DEHMANI, Helmi; ccPALIN-LUC, Thierry; ccMAREAU, Charles; KOECHLIN, Samuel; ccBRUGGER, Charles (2016)
    Some parts of electrical machines are built from stacks of thin steel sheets, for which the coarse grain microstructure allows for minimizing magnetic losses. The fabrication process of these parts usually involves punching ...
  • Study of the contribution of different effects induced by the punching process on the high cycle fatigue strength of the M330-35A electrical steel 
    Article dans une revue avec comité de lecture
    DEHMANI, Helmi; ccPALIN-LUC, Thierry; ccMAREAU, Charles; KOECHLIN, Samuel; ccBRUGGER, Charles (ESIS - Elsevier, 2016)
    Because of their improved magnetic properties, Fe-Si alloys are widely used for new electric motor generations. The use of punching process to obtain these components specially affects their mechanical behavior and fatigue ...
  • High cycle fatigue strength assessment methodology considering punching effects 
    Article dans une revue avec comité de lecture
    DEHMANI, Helmi; ccPALIN-LUC, Thierry; ccMAREAU, Charles; KOECHLIN, Samuel; ccBRUGGER, Charles (Elsevier, 2018)
    Since a decrease of the fatigue strength may result from punching operations, this study proposes a methodology for designing punched parts against high cycle fatigue crack initiation. To reach this goal, high cycle fatigue ...

Parcourir

Tout SAMLaboratoiresAuteursDates de publicationCampus/InstitutsCe LaboratoireAuteursDates de publicationCampus/Instituts

Lettre Diffuser la Science

Dernière lettreVoir plus

Statistiques de consultation

Publications les plus consultéesStatistiques par paysAuteurs les plus consultés

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales