Portevin-Le Chatelier effect triggered by complex loading paths in an Al–Cu aluminium alloy

Sicong REN; T.F. Morgeneyer; M. Mazière; S. Forest; G. Rousselier

doi:10.1080/14786435.2018.1550296

Portevin-Le Chatelier effect triggered by complex loading paths in an Al–Cu aluminium alloy

Sicong REN, T.F. Morgeneyer, M. Mazière, S. Forest, G. Rousselier

Not published at VTT

Mines ParisTech

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

12 Citations (Scopus)

Abstract

Serrated flow has been observed during non monotonic tensile tests of an Al–Cu aluminium alloy in the naturally aged state. The associated propagative localisation bands were observed by digital image correlation (DIC). In particular, the Portevin-Le Chatelier (PLC) effect and also Lüders bands were observed in interrupted tests during which the specimen was held for a length of time and also in tests with partial unloading followed by a holding time. Increasing strain rate jumps also triggered the PLC effect. These observations indicate the existence of the PLC effect in this material which was formerly considered insensitive to it at room temperature under monotonic loading conditions. There is no evidence of PLC serrations during constant strain rate tests. A strain ageing finite element model is used that captures the experimentally found PLC triggering effects.

Original language	English
Pages (from-to)	659-678
Number of pages	20
Journal	Philosophical Magazine
Volume	99
Issue number	6
DOIs	https://doi.org/10.1080/14786435.2018.1550296
Publication status	Published - 19 Mar 2019
MoE publication type	A1 Journal article-refereed

Keywords

AA2139-T3 aluminium alloy
Portevin-Le chatelier effect
strain path change
strain rate sensitivity
stress relaxation

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10.1080/14786435.2018.1550296

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title = "Portevin-Le Chatelier effect triggered by complex loading paths in an Al–Cu aluminium alloy",

abstract = "Serrated flow has been observed during non monotonic tensile tests of an Al–Cu aluminium alloy in the naturally aged state. The associated propagative localisation bands were observed by digital image correlation (DIC). In particular, the Portevin-Le Chatelier (PLC) effect and also L{\"u}ders bands were observed in interrupted tests during which the specimen was held for a length of time and also in tests with partial unloading followed by a holding time. Increasing strain rate jumps also triggered the PLC effect. These observations indicate the existence of the PLC effect in this material which was formerly considered insensitive to it at room temperature under monotonic loading conditions. There is no evidence of PLC serrations during constant strain rate tests. A strain ageing finite element model is used that captures the experimentally found PLC triggering effects.",

keywords = "AA2139-T3 aluminium alloy, Portevin-Le chatelier effect, strain path change, strain rate sensitivity, stress relaxation",

author = "Sicong REN and T.F. Morgeneyer and M. Mazi{\`e}re and S. Forest and G. Rousselier",

note = "Funding Information: We thank ANR project, with reference ANR-11-BS09-0008, on {"}Analysis of fracture at low stress for partial funding of this work. The authors gratefully acknowledge Constellium C-TEC for materials supply. We would like to acknowledge Vladimir A. Esin of the Centre des Mat{\'e}riaux at Mines ParisTech for help with the DICTRA simulations and discussions. Publisher Copyright: {\textcopyright} 2018, {\textcopyright} 2018 Informa UK Limited, trading as Taylor & Francis Group.",

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AU - REN, Sicong

AU - Morgeneyer, T.F.

AU - Mazière, M.

AU - Forest, S.

AU - Rousselier, G.

N1 - Funding Information: We thank ANR project, with reference ANR-11-BS09-0008, on "Analysis of fracture at low stress for partial funding of this work. The authors gratefully acknowledge Constellium C-TEC for materials supply. We would like to acknowledge Vladimir A. Esin of the Centre des Matériaux at Mines ParisTech for help with the DICTRA simulations and discussions. Publisher Copyright: © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

PY - 2019/3/19

Y1 - 2019/3/19

N2 - Serrated flow has been observed during non monotonic tensile tests of an Al–Cu aluminium alloy in the naturally aged state. The associated propagative localisation bands were observed by digital image correlation (DIC). In particular, the Portevin-Le Chatelier (PLC) effect and also Lüders bands were observed in interrupted tests during which the specimen was held for a length of time and also in tests with partial unloading followed by a holding time. Increasing strain rate jumps also triggered the PLC effect. These observations indicate the existence of the PLC effect in this material which was formerly considered insensitive to it at room temperature under monotonic loading conditions. There is no evidence of PLC serrations during constant strain rate tests. A strain ageing finite element model is used that captures the experimentally found PLC triggering effects.

AB - Serrated flow has been observed during non monotonic tensile tests of an Al–Cu aluminium alloy in the naturally aged state. The associated propagative localisation bands were observed by digital image correlation (DIC). In particular, the Portevin-Le Chatelier (PLC) effect and also Lüders bands were observed in interrupted tests during which the specimen was held for a length of time and also in tests with partial unloading followed by a holding time. Increasing strain rate jumps also triggered the PLC effect. These observations indicate the existence of the PLC effect in this material which was formerly considered insensitive to it at room temperature under monotonic loading conditions. There is no evidence of PLC serrations during constant strain rate tests. A strain ageing finite element model is used that captures the experimentally found PLC triggering effects.

KW - AA2139-T3 aluminium alloy

KW - Portevin-Le chatelier effect

KW - strain path change

KW - strain rate sensitivity

KW - stress relaxation

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DO - 10.1080/14786435.2018.1550296

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VL - 99

SP - 659

EP - 678

JO - Philosophical Magazine

JF - Philosophical Magazine

IS - 6

ER -

Portevin-Le Chatelier effect triggered by complex loading paths in an Al–Cu aluminium alloy

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Keywords

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