Analytical model for estimating calcium solution strengthening in single-crystal Mg-Ca alloys at finite temperatures

Liu, Lijun; Miyake, Misaki; Matsuda, Takumi et al.

Materialia, 2023, 32, 101900

Number of Access:475（2025-11-20 06:11 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/92842

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Title
Analytical model for estimating calcium solution strengthening in single-crystal Mg-Ca alloys at finite temperatures
Creator
NRID
1000080809195 1000080809195
ORCID
0000-0003-3914-8865 0000-0003-3914-8865
researchmap permalink
kellyliu kellyliu
Scopus Author ID
57193269472 57193269472
CreatorName
Liu, Lijun
CreatorName
Miyake, Misaki
CreatorName
Matsuda, Takumi
CreatorName
Li, Li
NRID
1000070206150 1000070206150
researchmap permalink
read0013927 read0013927
Scopus Author ID
7006481681 7006481681
CreatorName
Shibutani, Yoji
Subject
Critical resolved shear stress
Edge dislocation
Magnesium alloy
Molecular dynamics
Solid solution strengthening
Description
Liu L., Miyake M., Matsuda T., et al. Analytical model for estimating calcium solution strengthening in single-crystal Mg-Ca alloys at finite temperatures. Materialia 32, 101900 (2023); https://doi.org/10.1016/j.mtla.2023.101900.
Abstract
Mg is the lightest structural metal and a suitable replacement for heavy steel and Al alloys. However, Mg exhibits poor plastic formability at room temperature, and the strength of conventional Mg alloys is less than that of most Al alloys. Its low formability at room temperature is attributed to the lack of slip systems because of the extremely large gap in the critical resolved shear stress (CRSS) between the lowest basal system and the other slip and twin systems. This low CRSS of the basal slip usually limits the strength of Mg alloys. Therefore, strengthening the basal slip is important to improve the strength and deformability of Mg alloys and enhance their ductility. In this study, we construct an analytical model for predicting the CRSS in single-crystal Mg–Ca alloys at finite temperatures by quantitatively investigating the CRSS for the 〈a〉 dislocation gliding on the basal plane at temperatures from 1 to 500 K through molecular-dynamics computations. The prediction results agree well with our simulation results and the micropillar compression test results of Mg–0.3at.%Ca and Mg–0.6at.%Ca alloys at room temperature.
Publisher
Elsevier B.V.
Source Title
Materialia
Volume (Issue)
32
Page
101900
Date of Issued
2023-12-01
Language
English
Handle URL
https://hdl.handle.net/11094/92842
eISSN
25891529
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.mtla.2023.101900
Access Rights
embargoed access
CopyRight
© 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
The full-text file will be made open to the public on 1 December 2025 in accordance with the publisher's policy.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article