Flow stress and work hardening of Mg-Y alloys

Kula, A.; Jia, Xiang‐Meng; Mishra, Raj Kumar; Niewczas, M.

doi:10.1016/j.ijplas.2017.01.012

Cited by 118 publications

(24 citation statements)

References 60 publications

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“…The feature of the curves indicates occurrence of dynamic recrystallization and also implies that the flow stress is sensitive to the strain rate and deformation temperature. Compared with the reported research, directionally solidified Mg-4 wt.% Zn alloy in this paper yields higher stress compared with Mg-Y alloy performed by Kula [25], which is mainly contributed to the original…”

Section: Hot Deformation Behaviorcontrasting

confidence: 56%

Deformation Behavior of Directionally Solidified Mg-4 wt.% Zn Alloy during Hot Compression Experiment

Jia¹,

Jianxiu²

2020

Int J Metall Met Phys

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The hot deformation behavior of directionally solidified Mg-4 wt.% Zn alloy was investigated by compression tests at temperatures of 150 °C ∼ 300 °C and strain rates of 0.01 s-1 ∼ 10 s-1. The results show that the flow stress is influenced by strain rate, deformation temperature and true strain. The constitutive equation of the directionally solidified alloy is determined and can be expressed as:

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Section: Hot Deformation Behaviorcontrasting

confidence: 56%

Deformation Behavior of Directionally Solidified Mg-4 wt.% Zn Alloy during Hot Compression Experiment

Jia¹,

Jianxiu²

2020

Int J Metall Met Phys

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“…Yttrium addition has been reported to increase CRSS for BS in Mg1.13 at% Y alloys 9) and CRSS for both FPCS and PS in Mg(0.5³1.3) at%Y alloy single crystals. 7) These results indicate that increasing • 0.2 results from increasing CRSSs for slip systems due to yttrium addition.…”

Section: Discussionmentioning

confidence: 95%

Effects of Yttrium Addition on Plastic Deformation of Rolled Magnesium

et al. 2020

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Tensile tests were applied to rolled MgY alloy sheets with three at% of yttrium-Mg0.54 at% Y, Mg0.9 at% Y, and Mg1.21 at% Y-to investigate effects of yttrium addition on activities of basal slip and non-basal slip systems so as to clarify the relationship between tensile properties and activities of slip systems. 0.2% proof stress of MgY alloys increased with increasing yttrium content ranging from 0.5 to 1.2 at%. Ductility increased with increasing yttrium content until 0.9 at% but decreased when 1.2 at% was added. Frequencies of basal and non-basal slips increased by yttrium addition. The frequency of f10 11gh11 23i first order pyramidal slip (FPCS) increased with increasing yttrium content until 0.9 at% and decreased when 1.2 at% was added. With increasing yttrium content, the frequency of f11 22gh11 23i second order pyramidal slip (SPCS) decreased, while that of f10 10gh11 20i prismatic slip (PS) increased. The highest total frequency of non-basal slips was observed in Mg 0.9Y, showing the highest ductility. Enhancement of ductility on magnesium was caused by activation of both basal and non-basal slips through yttrium addition.

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“…This result is unexpected, since the work-hardening rate of alloys with high SFEs normally decreases monotonically with increasing strain [16,30]. As seen from Figure 3, in Stage A, the work-hardening rate of three Cu-Ni alloys sharply decreases as a consequence of elastoplastic transition [31,32]. It should be noted that these curves in Stage A are almost parallel to each other, implying that the evolutional rate of dislocation density is As seen from Figure 3, in Stage A, the work-hardening rate of three Cu-Ni alloys sharply decreases as a consequence of elastoplastic transition [31,32].…”

Section: Unexpected Multistage Work-hardening Behavior Of Cu-ni Alloysmentioning

confidence: 93%

“…As seen from Figure 3, in Stage A, the work-hardening rate of three Cu-Ni alloys sharply decreases as a consequence of elastoplastic transition [31,32]. It should be noted that these curves in Stage A are almost parallel to each other, implying that the evolutional rate of dislocation density is As seen from Figure 3, in Stage A, the work-hardening rate of three Cu-Ni alloys sharply decreases as a consequence of elastoplastic transition [31,32]. It should be noted that these curves in Stage A are almost parallel to each other, implying that the evolutional rate of dislocation density is almost the same at the very beginning of plastic deformation.…”

Section: Unexpected Multistage Work-hardening Behavior Of Cu-ni Alloysmentioning

confidence: 96%

Impact of Short-Range Clustering on the Multistage Work-Hardening Behavior in Cu–Ni Alloys

Han

Jin-xian

Guan

et al. 2019

Metals

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The work-hardening behavior of Cu–Ni alloys with high stacking-fault energies (SFEs) is experimentally investigated under uniaxial compression. It is found that, with the increase of Ni content (or short-range clustering, SRC), the flow stress of Cu–Ni alloys is significantly increased, which is mainly attributed to an enhanced contribution of work-hardening. An unexpected multistage (including Stages A, B, and C) work-hardening process was found in this alloy, and such a work-hardening behavior is essentially related to the existence of SRC structures in alloys. Specifically, during deformation in Stage B (within the strain range of 0.04–0.07), the forming tendency to planar-slip dislocation structures becomes enhanced with an increase of SRC content (namely, increase of Ni content), leading to the occurrence of work-hardening rate recovery in the Cu–20at.% Ni alloy. In short, increasing SRC in the Cu–Ni alloy can trigger an unexpected multistage work-hardening process, and thus improve its work-hardening capacity.

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Flow stress and work hardening of Mg-Y alloys

Cited by 118 publications

References 60 publications

Deformation Behavior of Directionally Solidified Mg-4 wt.% Zn Alloy during Hot Compression Experiment

Deformation Behavior of Directionally Solidified Mg-4 wt.% Zn Alloy during Hot Compression Experiment

Effects of Yttrium Addition on Plastic Deformation of Rolled Magnesium

Impact of Short-Range Clustering on the Multistage Work-Hardening Behavior in Cu–Ni Alloys

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