Aging behavior of the extruded SiCp-reinforced AZ91 Mg alloy composite

Hai Chang; Xiaoshi Hu; Xiaojun Wang; Junfeng Du; Libo Tong

doi:10.1557/jmr.2018.427

Aging behavior of the extruded SiCp-reinforced AZ91 Mg alloy composite

Hai Chang
, Xiaoshi Hu^*
, Xiaojun Wang
, Junfeng Du
, Libo Tong

^*Corresponding author for this work

University of Science and Technology Beijing
Harbin Institute of Technology
CAS - Changchun Institute of Applied Chemistry

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

7 Scopus citations

Abstract

The effect of SiCp on the aging behavior of the extruded SiCp/AZ91 composite fabricated by stir casting was investigated in detail. The necklace-type distribution of the particles in the cast SiCp/AZ91 composite was destroyed, and the extrusion bands consisting of SiCp and small dynamic recrystallized grains formed aligning along the extrusion direction. Addition of SiCp could accelerate the aging kinetics of the AZ91 matrix because of the overlapped particle plastic zone. The improved particle distribution and refined grains caused by the recrystallization could affect the aging behavior of the SiCp/AZ91 composite. The Mg17A1 discontinuous precipitates preferred to nucleate at the SiC/Mg interfaces and the grain boundaries within the extrusion bands and then expanded into the particle-free region. Moreover, the promoted discontinuous precipitates would suppress the continuous intragranular precipitates with respect to the unreinforced AZ91 alloy.

Original language	English
Pages (from-to)	335-343
Number of pages	9
Journal	Journal of Materials Research
Volume	34
Issue number	2
DOIs	https://doi.org/10.1557/jmr.2018.427
State	Published - 28 Jan 2019
Externally published	Yes

Keywords

Aging treatment
Extrusion
Mg17A1 precipitates
Microstructure
SiCp/AZ91 composite
Tensile properties

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10.1557/jmr.2018.427

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title = "Aging behavior of the extruded SiCp-reinforced AZ91 Mg alloy composite",

abstract = "The effect of SiCp on the aging behavior of the extruded SiCp/AZ91 composite fabricated by stir casting was investigated in detail. The necklace-type distribution of the particles in the cast SiCp/AZ91 composite was destroyed, and the extrusion bands consisting of SiCp and small dynamic recrystallized grains formed aligning along the extrusion direction. Addition of SiCp could accelerate the aging kinetics of the AZ91 matrix because of the overlapped particle plastic zone. The improved particle distribution and refined grains caused by the recrystallization could affect the aging behavior of the SiCp/AZ91 composite. The Mg17A1 discontinuous precipitates preferred to nucleate at the SiC/Mg interfaces and the grain boundaries within the extrusion bands and then expanded into the particle-free region. Moreover, the promoted discontinuous precipitates would suppress the continuous intragranular precipitates with respect to the unreinforced AZ91 alloy.",

keywords = "Aging treatment, Extrusion, Mg17A1 precipitates, Microstructure, SiCp/AZ91 composite, Tensile properties",

author = "Hai Chang and Xiaoshi Hu and Xiaojun Wang and Junfeng Du and Libo Tong",

note = "Publisher Copyright: {\textcopyright} Materials Research Society 2018.",

year = "2019",

month = jan,

day = "28",

doi = "10.1557/jmr.2018.427",

language = "英语",

volume = "34",

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journal = "Journal of Materials Research",

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T1 - Aging behavior of the extruded SiCp-reinforced AZ91 Mg alloy composite

AU - Chang, Hai

AU - Hu, Xiaoshi

AU - Wang, Xiaojun

AU - Du, Junfeng

AU - Tong, Libo

N1 - Publisher Copyright: © Materials Research Society 2018.

PY - 2019/1/28

Y1 - 2019/1/28

N2 - The effect of SiCp on the aging behavior of the extruded SiCp/AZ91 composite fabricated by stir casting was investigated in detail. The necklace-type distribution of the particles in the cast SiCp/AZ91 composite was destroyed, and the extrusion bands consisting of SiCp and small dynamic recrystallized grains formed aligning along the extrusion direction. Addition of SiCp could accelerate the aging kinetics of the AZ91 matrix because of the overlapped particle plastic zone. The improved particle distribution and refined grains caused by the recrystallization could affect the aging behavior of the SiCp/AZ91 composite. The Mg17A1 discontinuous precipitates preferred to nucleate at the SiC/Mg interfaces and the grain boundaries within the extrusion bands and then expanded into the particle-free region. Moreover, the promoted discontinuous precipitates would suppress the continuous intragranular precipitates with respect to the unreinforced AZ91 alloy.

AB - The effect of SiCp on the aging behavior of the extruded SiCp/AZ91 composite fabricated by stir casting was investigated in detail. The necklace-type distribution of the particles in the cast SiCp/AZ91 composite was destroyed, and the extrusion bands consisting of SiCp and small dynamic recrystallized grains formed aligning along the extrusion direction. Addition of SiCp could accelerate the aging kinetics of the AZ91 matrix because of the overlapped particle plastic zone. The improved particle distribution and refined grains caused by the recrystallization could affect the aging behavior of the SiCp/AZ91 composite. The Mg17A1 discontinuous precipitates preferred to nucleate at the SiC/Mg interfaces and the grain boundaries within the extrusion bands and then expanded into the particle-free region. Moreover, the promoted discontinuous precipitates would suppress the continuous intragranular precipitates with respect to the unreinforced AZ91 alloy.

KW - Aging treatment

KW - Extrusion

KW - Mg17A1 precipitates

KW - Microstructure

KW - SiCp/AZ91 composite

KW - Tensile properties

UR - https://www.scopus.com/pages/publications/85057135576

U2 - 10.1557/jmr.2018.427

DO - 10.1557/jmr.2018.427

M3 - 文章

AN - SCOPUS:85057135576

SN - 0884-2914

VL - 34

SP - 335

EP - 343

JO - Journal of Materials Research

JF - Journal of Materials Research

IS - 2

ER -

Aging behavior of the extruded SiCp-reinforced AZ91 Mg alloy composite

Abstract

Keywords

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