Development of high-strength, low-cost wrought Mg-2.5mass% Zn alloy through micro-alloying with Ca and La

Y. Z. Du; X. G. Qiao; M. Y. Zheng; K. Wu; S. W. Xu

doi:10.1016/j.matdes.2015.07.029

Development of high-strength, low-cost wrought Mg-2.5mass% Zn alloy through micro-alloying with Ca and La

Y. Z. Du
, X. G. Qiao
, M. Y. Zheng^*
, K. Wu
, S. W. Xu

^*Corresponding author for this work

Harbin Institute of Technology
Shanghai Baosteel Research Institute

Research output: Contribution to journal › Article › peer-review

103 Scopus citations

Abstract

A high-strength low-cost Mg-2.5Zn-0.3Ca-0.4La (mass%) alloy was fabricated by hot extrusion following direct-chill casting. Yield strength (YS), ultimate tensile strength (UTS) and elongation to failure of the alloy are 325. MPa, 341. MPa and 15%, respectively. The high strength of the extruded Mg-2.5Zn-0.3Ca-0.4La alloy is mainly due to grain refinement, dense precipitation and high density of dislocations. The extruded alloy exhibits a bimodal microstructure containing fine dynamic recrystallized (DRXed) grains and deformed regions. High density of dislocations is stored in the deformed regions while dense precipitates are homogeneously distributed in both the DRXed grains and the deformed regions. However, precipitates in the DRXed regions show in spherical shape only, while they are in rod-like shape and spherical shape in the deformed regions.

Original language	English
Pages (from-to)	549-557
Number of pages	9
Journal	Materials and Design
Volume	85
DOIs	https://doi.org/10.1016/j.matdes.2015.07.029
State	Published - 15 Nov 2015
Externally published	Yes

Keywords

Extrusion
Mg-Zn-Ca-La alloy
Microalloying
Microstructure
Precipitates

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10.1016/j.matdes.2015.07.029

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@article{3dc2bdde4e65411994bde8f0d8eff54e,

title = "Development of high-strength, low-cost wrought Mg-2.5mass\% Zn alloy through micro-alloying with Ca and La",

abstract = "A high-strength low-cost Mg-2.5Zn-0.3Ca-0.4La (mass\%) alloy was fabricated by hot extrusion following direct-chill casting. Yield strength (YS), ultimate tensile strength (UTS) and elongation to failure of the alloy are 325. MPa, 341. MPa and 15\%, respectively. The high strength of the extruded Mg-2.5Zn-0.3Ca-0.4La alloy is mainly due to grain refinement, dense precipitation and high density of dislocations. The extruded alloy exhibits a bimodal microstructure containing fine dynamic recrystallized (DRXed) grains and deformed regions. High density of dislocations is stored in the deformed regions while dense precipitates are homogeneously distributed in both the DRXed grains and the deformed regions. However, precipitates in the DRXed regions show in spherical shape only, while they are in rod-like shape and spherical shape in the deformed regions.",

keywords = "Extrusion, Mg-Zn-Ca-La alloy, Microalloying, Microstructure, Precipitates",

author = "Du, \{Y. Z.\} and Qiao, \{X. G.\} and Zheng, \{M. Y.\} and K. Wu and Xu, \{S. W.\}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = nov,

day = "15",

doi = "10.1016/j.matdes.2015.07.029",

language = "英语",

volume = "85",

pages = "549--557",

journal = "Materials and Design",

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TY - JOUR

T1 - Development of high-strength, low-cost wrought Mg-2.5mass% Zn alloy through micro-alloying with Ca and La

AU - Du, Y. Z.

AU - Qiao, X. G.

AU - Zheng, M. Y.

AU - Wu, K.

AU - Xu, S. W.

PY - 2015/11/15

Y1 - 2015/11/15

N2 - A high-strength low-cost Mg-2.5Zn-0.3Ca-0.4La (mass%) alloy was fabricated by hot extrusion following direct-chill casting. Yield strength (YS), ultimate tensile strength (UTS) and elongation to failure of the alloy are 325. MPa, 341. MPa and 15%, respectively. The high strength of the extruded Mg-2.5Zn-0.3Ca-0.4La alloy is mainly due to grain refinement, dense precipitation and high density of dislocations. The extruded alloy exhibits a bimodal microstructure containing fine dynamic recrystallized (DRXed) grains and deformed regions. High density of dislocations is stored in the deformed regions while dense precipitates are homogeneously distributed in both the DRXed grains and the deformed regions. However, precipitates in the DRXed regions show in spherical shape only, while they are in rod-like shape and spherical shape in the deformed regions.

AB - A high-strength low-cost Mg-2.5Zn-0.3Ca-0.4La (mass%) alloy was fabricated by hot extrusion following direct-chill casting. Yield strength (YS), ultimate tensile strength (UTS) and elongation to failure of the alloy are 325. MPa, 341. MPa and 15%, respectively. The high strength of the extruded Mg-2.5Zn-0.3Ca-0.4La alloy is mainly due to grain refinement, dense precipitation and high density of dislocations. The extruded alloy exhibits a bimodal microstructure containing fine dynamic recrystallized (DRXed) grains and deformed regions. High density of dislocations is stored in the deformed regions while dense precipitates are homogeneously distributed in both the DRXed grains and the deformed regions. However, precipitates in the DRXed regions show in spherical shape only, while they are in rod-like shape and spherical shape in the deformed regions.

KW - Extrusion

KW - Mg-Zn-Ca-La alloy

KW - Microalloying

KW - Microstructure

KW - Precipitates

UR - https://www.scopus.com/pages/publications/84940755831

U2 - 10.1016/j.matdes.2015.07.029

DO - 10.1016/j.matdes.2015.07.029

M3 - 文章

AN - SCOPUS:84940755831

SN - 0264-1275

VL - 85

SP - 549

EP - 557

JO - Materials and Design

JF - Materials and Design

ER -

Development of high-strength, low-cost wrought Mg-2.5mass% Zn alloy through micro-alloying with Ca and La

Abstract

Keywords

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