The Portevin–Le Chatelier effect in an Al-Mg alloy

Mogucheva, Anna; Saenko, M. I.; Kaibyshev, Rustam

doi:10.1063/1.4966449

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…The AA5083 H116 base metal sample displays a comparatively lower strength (YS: 196 ± 3 MPa, UTS: 340 ± 2 MPa) with a % elongation of 15 ± 2 compared to AA7075 STA and AA7075 ST base metal samples. Serrated flow is observed in the σ–ε curve of AA5083 base samples; further investigation revealed that it is due to the phenomenon known as the Portevin–Le Chatelier (PL) effect, which is quite common for Al-Mg alloys [ 36 ]. The dynamic interaction between the solute atoms and mobile dislocations leads to this effect.…”

Section: Resultsmentioning

confidence: 99%

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Rotary Friction Welded AA7075 and AA5083 Dissimilar Joint

et al. 2023

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The present work aims to investigate the changes in the microstructural and mechanical properties of various pre- and post weld heat treatments (PWHTs) on rotary friction welded dissimilar (AA7075 and AA5083) aluminum alloys. The investigation focused on the evolution of weld macro- and microstructures, as well as the changes in hardness and tensile properties resulting from friction welding. The joint integrity was studied through various characterization techniques, and no cracks or incomplete bonding was observed. The study found that the dissimilar joints of the AA7075 and AA5083 alloys displayed higher flash formation on the AA7075 side, which has a lower melting temperature compared to the AA5083 alloy. Various zones were identified in the weld region, including the dynamic recrystallized zone (DRZ), the thermomechanically affected zone (TMAZ) consisting of TMAZ-1 (elongated grains) and TMAZ-2 (compressed/distorted grains), the heat-affected zone (HAZ), and the base metal (BM) zone. The rotary friction welded sample AA5083/AA7075-PWHT joint exhibited the highest strength (yield strength (YS): 195 ± 3 MPa, ultimate tensile strength (UTS): 387 ± 2 MPa) among all the other welded conditions, and this may be attributed to the major strengthening precipitates MgZn2 (of AA7075) formed during postweld aging. All dissimilar welds failed in the HAZ region of the AA5083 side due to the formation of coarse grains, indicating the weakest region.

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Section: Resultsmentioning

confidence: 99%

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Rotary Friction Welded AA7075 and AA5083 Dissimilar Joint

et al. 2023

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“…A velocidade de uma única banda tipo A também diminui com o tempo, parando por fim no final da amostra, segundo Makinen (2016). A diferença entre a velocidade de nucleação e a velocidade da banda anterior na chegada a extremidade fixa fixo diminui ao longo do regime de bandas tipo A até que esteja próximo de zero e uma banda tipo B nucleie.…”

Section: Efeito De Portevin-le Chatelier (Efeito Plc)unclassified

Influência da anisotropia sobre o efeito de Portevin-Le Chatelier nas chapas AA5182

Santos,

Prazeres,

Medeiros

2023

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Editora Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). O conteúdo do texto e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterála de nenhuma forma ou utilizá-la para fins comerciais.Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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“…Research has established that at some of Al-alloys from 5xxx series, during cold plastic deformation, regardless of previous technological processing, localized deformations associated with the Portevin-Le Chatelier (PLC) effect occur [7][8][9][10]. The PLC effect manifests itself on stress-strain diagrams during static tensile testing as a specific serration of the curve with sudden changes in stress, Figure 1.…”

Section: Introductionmentioning

confidence: 99%

PLC Effect at Different Types of Loading During Static Tensile Testing of Aluminium Alloys

Jandrlić¹,

Brlić²,

Mrkobrada³

et al. 2023

AMS

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Aluminium and aluminium alloys are indispensable materials nowadays, widely used in various constructions. It is known that some aluminium alloys, such as Al-Mg, show inhomogeneous, localized deformation phenomena at certain temperatures and strain rates. This is known in the literature as the appearance of Portevin-Le Chatelier lines, or short the PLCeffect. The Portevin-Le Chatelier effect contributes to the reduction of material ductility and leaves surface defects on the final products. The study of this phenomenon was carried out using a static tensile test and the digital image correlation method. The influence of using a constant increase of stress on the phenomenon itself was studied in comparison to the classical control of the testing machine with a constant crosshead speed. The results of the study show that the phenomenon persists regardless of the type of control and no significant changes were observed at used testing parameters. Regardless of the deformation parameters, PLC lines form throughout the whole duration of the plastic deformation until the specimen breaks.

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The Portevin–Le Chatelier effect in an Al-Mg alloy

Cited by 5 publications

References 13 publications

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Rotary Friction Welded AA7075 and AA5083 Dissimilar Joint

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Rotary Friction Welded AA7075 and AA5083 Dissimilar Joint

Influência da anisotropia sobre o efeito de Portevin-Le Chatelier nas chapas AA5182

PLC Effect at Different Types of Loading During Static Tensile Testing of Aluminium Alloys

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