Hall–Petch Slope in Ultrafine Grained Al-Mg Alloys

Zhou, Dengshan; Wang, Hao; Saxey, David W.; Muránsky, Ondrej; Geng, Hongwei; Rickard, William D.A.; Quadir, Zakaria; Yang, Chao; Reddy, Steven M.; Zhang, Deliang

doi:10.1007/s11661-019-05329-3

Cited by 18 publications

(4 citation statements)

References 53 publications

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“…However, it is difficult to produce a reverse Hall-Petch relationship for grain size in low-carbon steel. Therefore, the reverse Hall--Petch effect is not considered in this paper [26][27][28].…”

Section: Influence Factors Of Transverse Mechanical Propertiesmentioning

confidence: 99%

“…Similarly, twins are controlled by grain size. The effect of grain size on twinning is usually in two ways [27,29]. On the one hand, the nucleation of twins is controlled by the stress concentration at the grain boundary.…”

Section: Influence Factors Of Transverse Mechanical Propertiesmentioning

confidence: 99%

“…The appearance of the second phase improves the strength. It has been shown that in different metal systems containing precipitates or solute atoms, their presence leads to an increase in the K value [27]. K value is also affected by temperature.…”

Section: Influence Factors Of Transverse Mechanical Propertiesmentioning

confidence: 99%

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"Initiation mechanism on transverse microstructure and properties inhomogeneity of hot-rolled low-carbon steel plate "

He¹,

Zhang²,

Su³

et al. 2022

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The center and edge of the hot-rolled low-carbon steel plate reflect the inhomogeneity. Five positions along the transverse direction of the steel plate are taken as the research object. This study reveals the root cause of the inhomogeneity of transverse microstructure and properties of hot-rolled low-carbon steel plates. The grain size in the center of the hot-rolled low-carbon steel plate is relatively large, and the grain size at the edge is relatively small. The mechanical properties test shows that the closer the edge, the higher the hardness. The strength along the transverse direction is similar to the shape of W. The finite element simulation results show that the central cooling is slow, and the deformation degree is different in different transverse positions. In conclusion, the main reason for the inhomogeneous microstructure are the various cooling rates of different parts in the transverse direction. The synergistic effect of grain size and alloying elements is the main reason that causes the transverse strength distribution to show a "W" shape. K e y w o r d s : low-carbon steel, transverse structure and properties, cooling rate, finite element simulation

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Section: Influence Factors Of Transverse Mechanical Propertiesmentioning

confidence: 99%

Section: Influence Factors Of Transverse Mechanical Propertiesmentioning

confidence: 99%

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"Initiation mechanism on transverse microstructure and properties inhomogeneity of hot-rolled low-carbon steel plate "

He¹,

Zhang²,

Su³

et al. 2022

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“…It has been reported [14,15] that addition of alloying elements significantly increases the yield stress and leads to an increase in the apparent Hall–Petch slope of ultrafine-grained aluminium. It should however be noted that the materials investigated in most cases are commercial aluminium alloys produced by severe plastic deformation, which contain different kinds of solute atoms and precipitates as well as pre-existing dislocations in the ultrafine-grained structure.…”

Section: Introductionmentioning

confidence: 99%

Yielding behaviour and Hall–Petch relationship in ultrafine-grained Al–Mg binary alloys

Kamikawa

Hirooka

2021

Materials Science and Technology

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This study investigates yielding behaviour, Hall–Petch relationship and strengthening mechanism of ultrafine-grained Al–Mg binary alloys. Ultrafine-grained Al–Mg samples reveal unusual discontinuous yielding and extra Hall–Petch strengthening. The critical grain size to separate the extra Hall–Petch strengthening from the conventional Hall–Petch strengthening becomes larger as the Mg content is higher, indicating that dislocation sources in the ultrafine-grained structure becomes more difficult to activate by solute atoms of Mg. It is also found that the Lüders elongation in the discontinuous yielding becomes less pronounced by Mg addition, suggesting that enhancement of work hardening ability by addition of solute atoms is effective to avoid the occurrence of unwanted discontinuous yielding in ultrafine-grained metals.

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Effect of Stretch Bending on the Microstructure and Mechanical Properties of AZ31 Magnesium Alloy

Chen,

Shen,

Zhang

et al. 2024

J. of Materi Eng and Perform

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Hall–Petch Slope in Ultrafine Grained Al-Mg Alloys

Cited by 18 publications

References 53 publications

"Initiation mechanism on transverse microstructure and properties inhomogeneity of hot-rolled low-carbon steel plate "

"Initiation mechanism on transverse microstructure and properties inhomogeneity of hot-rolled low-carbon steel plate "

Yielding behaviour and Hall–Petch relationship in ultrafine-grained Al–Mg binary alloys

Effect of Stretch Bending on the Microstructure and Mechanical Properties of AZ31 Magnesium Alloy

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Hall–Petch Slope in Ultrafine Grained Al-Mg Alloys

Cited by 18 publications

References 53 publications

"Initiation mechanism on transverse microstructure and properties inhomogeneity of hot-rolled low-carbon steel plate "

"Initiation mechanism on transverse microstructure and properties inhomogeneity of hot-rolled low-carbon steel plate "

Yielding behaviour and Hall­–Petch relationship in ultrafine-grained Al–Mg binary alloys

Effect of Stretch Bending on the Microstructure and Mechanical Properties of AZ31 Magnesium Alloy

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Yielding behaviour and Hall–Petch relationship in ultrafine-grained Al–Mg binary alloys