Effect of high pressure on microstructure of cast Mg-8Zn-0.5Zr-0.5Gd alloy

Dong song Yin; Yun long Zhang; Yong liang An; Zhen ling Wang; Yun zhou Hu; Ai lian Liu

doi:10.1007/s41230-017-5018-5

Effect of high pressure on microstructure of cast Mg-8Zn-0.5Zr-0.5Gd alloy

Dong song Yin^*
, Yun long Zhang
, Yong liang An
, Zhen ling Wang
, Yun zhou Hu
, Ai lian Liu

^*Corresponding author for this work

Heilongjiang University of Science and Technology
Harbin Institute of Technology
Jiamusi University

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

Abstract

Mg-8Zn-0.5Zr-0.5Gd alloy was prepared by high pressure solidification. Effect of high pressure on microstructure, micro-hardness and corrosion behavior in Hank's solution of the Mg-8Zn-0.5Zr-0.5Gd alloy were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffractometer (XRD). The results showed that, compared with the conventional solidification, high pressure solidification obviously refined the grain size of Mg-8Zn-0.5Zr-0.5Gd alloy. The grain size was refined from 200-300 μm to 100-200 μm and the secondary dendrite arm spacing reduced from 30-50 μm to 10-30 μm. Moreover, the solubility of Zn in the alloy increased and the amount and size of Mg-Zn-Gd phases significantly decreased. The micro-hardness of the alloy solidified under high pressure was improved significantly from 56.17 HV to 63.14 HV. The polarization resistance (R_p) of the alloy had a substantial increase in simulated body fluid, thus the corrosion rate was significantly reduced from 4.0 to 2.7 mm·year^-1.

Original language	English
Pages (from-to)	22-27
Number of pages	6
Journal	China Foundry
Volume	14
Issue number	1
DOIs	https://doi.org/10.1007/s41230-017-5018-5
State	Published - 1 Jan 2017
Externally published	Yes

Keywords

corrosion rate
high pressure solidification
magnesium alloy
micro-hardness
microstructure

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10.1007/s41230-017-5018-5

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title = "Effect of high pressure on microstructure of cast Mg-8Zn-0.5Zr-0.5Gd alloy",

abstract = "Mg-8Zn-0.5Zr-0.5Gd alloy was prepared by high pressure solidification. Effect of high pressure on microstructure, micro-hardness and corrosion behavior in Hank's solution of the Mg-8Zn-0.5Zr-0.5Gd alloy were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffractometer (XRD). The results showed that, compared with the conventional solidification, high pressure solidification obviously refined the grain size of Mg-8Zn-0.5Zr-0.5Gd alloy. The grain size was refined from 200-300 μm to 100-200 μm and the secondary dendrite arm spacing reduced from 30-50 μm to 10-30 μm. Moreover, the solubility of Zn in the alloy increased and the amount and size of Mg-Zn-Gd phases significantly decreased. The micro-hardness of the alloy solidified under high pressure was improved significantly from 56.17 HV to 63.14 HV. The polarization resistance (Rp) of the alloy had a substantial increase in simulated body fluid, thus the corrosion rate was significantly reduced from 4.0 to 2.7 mm·year-1.",

keywords = "corrosion rate, high pressure solidification, magnesium alloy, micro-hardness, microstructure",

author = "Yin, \{Dong song\} and Zhang, \{Yun long\} and An, \{Yong liang\} and Wang, \{Zhen ling\} and Hu, \{Yun zhou\} and Liu, \{Ai lian\}",

note = "Publisher Copyright: {\textcopyright} 2017, Foundry Journal Agency and Springer Singapore.",

year = "2017",

month = jan,

day = "1",

doi = "10.1007/s41230-017-5018-5",

language = "英语",

volume = "14",

pages = "22--27",

journal = "China Foundry",

issn = "1672-6421",

publisher = "Springer Nature",

number = "1",

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TY - JOUR

T1 - Effect of high pressure on microstructure of cast Mg-8Zn-0.5Zr-0.5Gd alloy

AU - Yin, Dong song

AU - Zhang, Yun long

AU - An, Yong liang

AU - Wang, Zhen ling

AU - Hu, Yun zhou

AU - Liu, Ai lian

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Mg-8Zn-0.5Zr-0.5Gd alloy was prepared by high pressure solidification. Effect of high pressure on microstructure, micro-hardness and corrosion behavior in Hank's solution of the Mg-8Zn-0.5Zr-0.5Gd alloy were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffractometer (XRD). The results showed that, compared with the conventional solidification, high pressure solidification obviously refined the grain size of Mg-8Zn-0.5Zr-0.5Gd alloy. The grain size was refined from 200-300 μm to 100-200 μm and the secondary dendrite arm spacing reduced from 30-50 μm to 10-30 μm. Moreover, the solubility of Zn in the alloy increased and the amount and size of Mg-Zn-Gd phases significantly decreased. The micro-hardness of the alloy solidified under high pressure was improved significantly from 56.17 HV to 63.14 HV. The polarization resistance (Rp) of the alloy had a substantial increase in simulated body fluid, thus the corrosion rate was significantly reduced from 4.0 to 2.7 mm·year-1.

AB - Mg-8Zn-0.5Zr-0.5Gd alloy was prepared by high pressure solidification. Effect of high pressure on microstructure, micro-hardness and corrosion behavior in Hank's solution of the Mg-8Zn-0.5Zr-0.5Gd alloy were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffractometer (XRD). The results showed that, compared with the conventional solidification, high pressure solidification obviously refined the grain size of Mg-8Zn-0.5Zr-0.5Gd alloy. The grain size was refined from 200-300 μm to 100-200 μm and the secondary dendrite arm spacing reduced from 30-50 μm to 10-30 μm. Moreover, the solubility of Zn in the alloy increased and the amount and size of Mg-Zn-Gd phases significantly decreased. The micro-hardness of the alloy solidified under high pressure was improved significantly from 56.17 HV to 63.14 HV. The polarization resistance (Rp) of the alloy had a substantial increase in simulated body fluid, thus the corrosion rate was significantly reduced from 4.0 to 2.7 mm·year-1.

KW - corrosion rate

KW - high pressure solidification

KW - magnesium alloy

KW - micro-hardness

KW - microstructure

UR - https://www.scopus.com/pages/publications/85011958831

U2 - 10.1007/s41230-017-5018-5

DO - 10.1007/s41230-017-5018-5

M3 - 文章

AN - SCOPUS:85011958831

SN - 1672-6421

VL - 14

SP - 22

EP - 27

JO - China Foundry

JF - China Foundry

IS - 1

ER -

Effect of high pressure on microstructure of cast Mg-8Zn-0.5Zr-0.5Gd alloy

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Keywords

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