Journal Article

FZJ-2022-00244

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Exploring the transfer of plasticity across Laves phase interfaces in a dual phase magnesium alloy

Guénolé, J. (Corresponding author)Extern*RWTH* ; Zubair, M.Extern*RWTH* ; Roy, S.Extern*RWTH* ; Xie, Z.RWTH* ; Lipińska-Chwałek, M.FZJ*RWTH* ; Sandlöbes-Haut, S.RWTH* ; Korte-Kerzel, S.RWTH*

2021
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/29972  doi:10.1016/j.matdes.2021.109572

Abstract: The mechanical behaviour of Mgsingle bondAl alloys can be largely improved by the formation of an intermetallic Laves phase skeleton, in particular the creep strength. Recent nanomechanical studies revealed plasticity by dislocation glide in the (Mg,Al)2Ca Laves phase, even at room temperature. As strengthening skeleton, this phase remains, however, brittle at low temperature. In this work, we present experimental evidence of slip transfer from the Mg matrix to the (Mg,Al)2Ca skeleton at room temperature and explore associated mechanisms by means of atomistic simulations. We identify two possible mechanisms for transferring Mg basal slip into Laves phases depending on the crystallographic orientation: a direct and an indirect slip transfer triggered by full and partial dislocations, respectively. Our experimental and numerical observations also highlight the importance of interfacial sliding that can prevent the transfer of the plasticity from one phase to the other.

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Contributing Institute(s):

1. Materialwissenschaft u. Werkstofftechnik (ER-C-2)

Research Program(s):

1. 5353 - Understanding the Structural and Functional Behavior of Solid State Systems (POF4-535) (POF4-535)
2. SFB-1394-A03 - Charakterisierung von Versetzungen und planaren Defekten (A03) (437411567) (437411567)
3. SFB 1394 A02 - Atomistische Simulation von Versetzungsprozessen (A02) (437410971) (437410971)
4. SFB 1394 A05 - Versetzungen in komplexen intermetallischen Phasen (A05) (437412665) (437412665)
5. SFB 1394 C02 - Ko-Verformung von (inter)metallischen Kompositen (C02) (437514011) (437514011)
6. Multiphysikbeschreibung von Mg-Kompositen auf Kornebene (C01) (437513708) (437513708)

Appears in the scientific report 2021

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