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Thermodynamic analysis and experimental investigation of Mg-9Zn-xAl alloy for semi-solid processing
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Affiliation:

Shangluo University

Clc Number:

TG146.2

Fund Project:

Project(51464031, 51471123) supported by the National Natural Science Foundation of China; Project(16JK1241) supported by Scientific research plan of Shaanxi Education Department; Project(SK2016-29) supported by the planned Science and Technology of Shangluo City.

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    Abstract:

    Solidification temperature range, temperature sensitivity of solid fraction, temperature process window and phase composition and transformation path of Mg-9Zn-xAl(x=2,4,6) were calculated by Pandat calculation, and studied by experiment. The results indicate that the bigger temperature window is conducive to the control and operation of semi-solid forming for Mg-9Zn-xAl alloy, and the temperature sensitivity of solid fraction is all smaller than 0.015. Mg-9Zn-xAl alloy has the different transformation temperature and path of the phase at the different Al addition. α-Mg, MgZn, Mg32(Al,Zn)49 and Al5Mg11Zn4 were formed in all samples, when Al addition is increased to 6%, Mg17Al12 phase was formed. The grain size and roundness of Mg-9Zn-xAl alloys which prepared by self-inoculation rheo-diecasting method are 65.3μm, 56.5μm, 52.2μm and 1.3, 1.19, 1.23 respectively. When the operating temperature is 150℃, the comprehensive strength and deformation are 278MPa, 283MPa, 295MPa and 36.22%, 33.02%, 31.21% respectively.

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[Li Chun, Cui Le, Fan Xinhui. Thermodynamic analysis and experimental investigation of Mg-9Zn-xAl alloy for semi-solid processing[J]. Rare Metal Materials and Engineering,2019,48(6):1769~1776.]
DOI:10.12442/j. issn.1002-185X.20180049

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History
  • Received:January 13,2018
  • Revised:April 21,2018
  • Adopted:April 26,2018
  • Online: July 30,2019
  • Published: