Roles of deformation twinning and dislocation slip in the fatigue failure mechanism of AZ31 Mg alloys

J. Koike; N. Fujiyama; D. Ando; Y. Sutou

doi:10.1016/j.scriptamat.2010.03.021

Roles of deformation twinning and dislocation slip in the fatigue failure mechanism of AZ31 Mg alloys

J. Koike, N. Fujiyama, D. Ando, Y. Sutou

ENG - Materials Science

Tohoku University

Research output: Contribution to journal › Article › peer-review

136 Citations (Scopus)

Abstract

Fatigue tests were performed on AZ31 Mg alloys at room temperature in tension cycles. Deformation twinning of the {101̄2} type was observed both below and above the fatigue limit, indicating that the {101̄2} twins do not contribute directly to fatigue failure. However, prismatic slip and substantial cyclic hardening were observed above the fatigue limit. Progressive hardening gave rise to {1011}-{101̄2} double twinning that led to the formation of large surface steps, cracks and eventual failure.

Original language	English
Pages (from-to)	747-750
Number of pages	4
Journal	Scripta Materialia
Volume	63
Issue number	7
DOIs	https://doi.org/10.1016/j.scriptamat.2010.03.021
Publication status	Published - 2010 Oct

Keywords

Deformation
Failure
Fatigue
Magnesium
Twin

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10.1016/j.scriptamat.2010.03.021

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title = "Roles of deformation twinning and dislocation slip in the fatigue failure mechanism of AZ31 Mg alloys",

abstract = "Fatigue tests were performed on AZ31 Mg alloys at room temperature in tension cycles. Deformation twinning of the {10{\=1}2} type was observed both below and above the fatigue limit, indicating that the {10{\=1}2} twins do not contribute directly to fatigue failure. However, prismatic slip and substantial cyclic hardening were observed above the fatigue limit. Progressive hardening gave rise to {1011}-{10{\=1}2} double twinning that led to the formation of large surface steps, cracks and eventual failure.",

keywords = "Deformation, Failure, Fatigue, Magnesium, Twin",

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AU - Koike, J.

AU - Fujiyama, N.

AU - Ando, D.

AU - Sutou, Y.

PY - 2010/10

Y1 - 2010/10

N2 - Fatigue tests were performed on AZ31 Mg alloys at room temperature in tension cycles. Deformation twinning of the {101̄2} type was observed both below and above the fatigue limit, indicating that the {101̄2} twins do not contribute directly to fatigue failure. However, prismatic slip and substantial cyclic hardening were observed above the fatigue limit. Progressive hardening gave rise to {1011}-{101̄2} double twinning that led to the formation of large surface steps, cracks and eventual failure.

AB - Fatigue tests were performed on AZ31 Mg alloys at room temperature in tension cycles. Deformation twinning of the {101̄2} type was observed both below and above the fatigue limit, indicating that the {101̄2} twins do not contribute directly to fatigue failure. However, prismatic slip and substantial cyclic hardening were observed above the fatigue limit. Progressive hardening gave rise to {1011}-{101̄2} double twinning that led to the formation of large surface steps, cracks and eventual failure.

KW - Deformation

KW - Failure

KW - Fatigue

KW - Magnesium

KW - Twin

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EP - 750

JO - Scripta Materialia

JF - Scripta Materialia

IS - 7

ER -

Roles of deformation twinning and dislocation slip in the fatigue failure mechanism of AZ31 Mg alloys

Abstract

Keywords

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