The influence of specimens geometry on the PLC effect in Al–Mg–Mn (5182) alloy

Zdunek, Joanna; Spychalski, Wojciech; Mizera, J.; Kurzydłowski, Krzysztof J.

doi:10.1016/j.matchar.2006.03.009

Cited by 22 publications

(8 citation statements)

References 8 publications

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“…Zdunek et al found that the flow instability of Al alloy samples increases with the ratio of specimen perimeter to its cross sectional area. The PLC effect was more pronounced in rectangular and T-shaped specimens than in square and circular ones [122]. The bandwidth always increases with increasing specimen thickness [123].…”

Section: 12mentioning

confidence: 85%

The Portevin–Le Chatelier effect: a review of experimental findings

Yılmaz¹

2011

Science and Technology of Advanced Materials

238

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The Portevin-Le Chatelier (PLC) effect manifests itself as an unstable plastic flow during tensile tests of some dilute alloys under certain regimes of strain rate and temperature. The plastic strain becomes localized in the form of bands which move along a specimen gauge in various ways as the PLC effect occurs. Because the localization of strain causes degradation of the inherent structural properties and surface quality of materials, understanding the effect is crucial for the effective use of alloys. The characteristic behaviors of localized strain bands and techniques commonly used to study the PLC effect are summarized in this review. A brief overview of experimental findings, the effect of material properties and test parameters on the PLC effect, and some discussion on the mechanisms of the effect are included. Tests for predicting the early failure of structural materials due to embrittlement induced by the PLC effect are also discussed.

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Section: 12mentioning

confidence: 85%

The Portevin–Le Chatelier effect: a review of experimental findings

Yılmaz¹

2011

Science and Technology of Advanced Materials

238

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“…The latter tend to confirm that fracture occurs inside immobile PLC bands. However, PLC band formation and propagation is known to be dependent on specimen geometry and surface conditions [24][25][26] and laboratory forming trials have confirmed that PLC bands are not observed under complex biaxial stress/strain conditions when premature shear fracture occurs [1,10] although load-displacement fluctuations have been observed during deep drawing [21]. The same trials confirmed that the negative strain rate sensitivity was still present.…”

Section: Introductionmentioning

confidence: 79%

The Influence of Specimen Geometry and Strain Rate on the Portevin-Le Chatelier Effect and Fracture in an Austenitic FeMnC TWIP Steel

Kang

Shi

Liang

et al. 2020

Metals

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We studied the Portevin-Le Chatelier effect and fracture behavior of a FeMnC TWIP steel using high speed digital image correlation by varying the specimen geometry (flat vs. round) and test strain rate (0.001 vs. 0.1 s−1). The results show that the mean flow stress, the mean strain hardening rate and the mean strain rate sensitivity parameters are all independent of the specimen geometry and are uncorrelated with the presence or not of Portevin-Le Chatelier (PLC) bands, the type of PLC bands observed or the critical strain for band formation. However, both the fracture strains and stresses and the PLC behavior are highly geometry and/or strain rate dependent. Dynamic strain aging (DSA) and in particular the presence of PLC instabilities appears to play an important but as yet unclear role in promoting premature necking and final fracture.

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“…To investigate specimen geometry effects on the mechanical properties of AISI 1040 steels, borided and unborided specimens were cut out of the same piece of material. The specimens have the same amount of length and the same cross-section area, but varying shape of cross-sections (circular, square, rectangular) as indicated by Zdunek et al [12]. Thus, the geometric factor (GF) was defined as area of crosssection to perimeter ratio for each specimen.…”

Section: Methodsmentioning

confidence: 99%

“…It has been shown that the specimen geometry effects are closely related to the constraint of shear band processes and deforma-0932-0784 / 08 / 0700-0448 $ 06.00 c 2008 Verlag der Zeitschrift für Naturforschung, Tübingen · http://znaturforsch.com tion processes, resulting in various mechanical properties. On the other hand, Zdunek et al [12] showed that the Portevin-Le Chatelier (PLC) effect, in the form of serrations on stress-strain curves, depends on the geometry of specimen the cross-sections, and the obtained results provide a new insight into the dynamics of the PLC effects. Recently, Vorob'ev [13] reported that the deformability of boronized steels is related to the geometry of the test object, whereas the character of this relation is determined by the test temperature and class of steel.…”

Section: Introductionmentioning

confidence: 99%

Specimen Geometry Effect on the Mechanical Properties of AISI 1040 Steel

Çalık

Şahin

Uçar

2008

Zeitschrift Für Naturforschung A

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The specimen geometry effect on some mechanical properties, such as tensile behaviour and hardness, of borided and unborided AISI 1040 steels was investigated. Boronizing of steels was performed by the powder pack method at 1210 K for 4 h. The specimen geometry and the boride layer thickness and hardness is similar for all tested boronized steels and independent of varying the shape of cross-sections. On the other hand, the ultimate tensile stress and elongation depend on the specimen geometry due to stress concentration at the corners of the specimen.

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The influence of specimens geometry on the PLC effect in Al–Mg–Mn (5182) alloy

Cited by 22 publications

References 8 publications

The Portevin–Le Chatelier effect: a review of experimental findings

The Portevin–Le Chatelier effect: a review of experimental findings

The Influence of Specimen Geometry and Strain Rate on the Portevin-Le Chatelier Effect and Fracture in an Austenitic FeMnC TWIP Steel

Specimen Geometry Effect on the Mechanical Properties of AISI 1040 Steel

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