Thermodynamic properties and microstructure evolution of ternary Al-10%Cu-x%Sn immiscible alloys

W. Zhai; L. Hu; D. L. Geng; B. Wei

doi:10.1016/j.jallcom.2014.11.191

Thermodynamic properties and microstructure evolution of ternary Al-10%Cu-x%Sn immiscible alloys

W. Zhai, L. Hu, D. L. Geng, B. Wei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

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

18 Scopus citations

Abstract

The vertical phase diagram of ternary Al-10%Cu-x%Sn (x% from 3 to 75 wt.%) alloys is experimentally established with differential scanning calorimetry (DSC) method. The enthalpy of fusion during melting process is determined, which decreases linearly with the increase of Sn content. The undercoolability of those liquid alloys solidifying with the primary (Al) solid solution phase can be further enhanced by increasing the cooling rate. However, the increase of cooling rate has little influence on the other alloys with the preferential liquid phase separation. As Sn content rises, three kinds of liquid separation patterns are observed, which are the dispersed pattern of very fine L₂(Sn) droplets distributed within primary (Al) interdendritic areas, the segregated pattern of several large L₂ blocks enveloped by the Al-rich phase and the layered pattern consisting of top Al-rich zone and bottom Sn-rich zone.

Original language	English
Pages (from-to)	402-409
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	627
DOIs	https://doi.org/10.1016/j.jallcom.2014.11.191
State	Published - 5 Apr 2015

Keywords

Metals and alloys
Microstructure
Phase transitions
Thermal analysis

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10.1016/j.jallcom.2014.11.191

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title = "Thermodynamic properties and microstructure evolution of ternary Al-10%Cu-x%Sn immiscible alloys",

abstract = "The vertical phase diagram of ternary Al-10%Cu-x%Sn (x% from 3 to 75 wt.%) alloys is experimentally established with differential scanning calorimetry (DSC) method. The enthalpy of fusion during melting process is determined, which decreases linearly with the increase of Sn content. The undercoolability of those liquid alloys solidifying with the primary (Al) solid solution phase can be further enhanced by increasing the cooling rate. However, the increase of cooling rate has little influence on the other alloys with the preferential liquid phase separation. As Sn content rises, three kinds of liquid separation patterns are observed, which are the dispersed pattern of very fine L2(Sn) droplets distributed within primary (Al) interdendritic areas, the segregated pattern of several large L2 blocks enveloped by the Al-rich phase and the layered pattern consisting of top Al-rich zone and bottom Sn-rich zone.",

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author = "W. Zhai and L. Hu and Geng, {D. L.} and B. Wei",

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T1 - Thermodynamic properties and microstructure evolution of ternary Al-10%Cu-x%Sn immiscible alloys

AU - Zhai, W.

AU - Hu, L.

AU - Geng, D. L.

AU - Wei, B.

PY - 2015/4/5

Y1 - 2015/4/5

N2 - The vertical phase diagram of ternary Al-10%Cu-x%Sn (x% from 3 to 75 wt.%) alloys is experimentally established with differential scanning calorimetry (DSC) method. The enthalpy of fusion during melting process is determined, which decreases linearly with the increase of Sn content. The undercoolability of those liquid alloys solidifying with the primary (Al) solid solution phase can be further enhanced by increasing the cooling rate. However, the increase of cooling rate has little influence on the other alloys with the preferential liquid phase separation. As Sn content rises, three kinds of liquid separation patterns are observed, which are the dispersed pattern of very fine L2(Sn) droplets distributed within primary (Al) interdendritic areas, the segregated pattern of several large L2 blocks enveloped by the Al-rich phase and the layered pattern consisting of top Al-rich zone and bottom Sn-rich zone.

AB - The vertical phase diagram of ternary Al-10%Cu-x%Sn (x% from 3 to 75 wt.%) alloys is experimentally established with differential scanning calorimetry (DSC) method. The enthalpy of fusion during melting process is determined, which decreases linearly with the increase of Sn content. The undercoolability of those liquid alloys solidifying with the primary (Al) solid solution phase can be further enhanced by increasing the cooling rate. However, the increase of cooling rate has little influence on the other alloys with the preferential liquid phase separation. As Sn content rises, three kinds of liquid separation patterns are observed, which are the dispersed pattern of very fine L2(Sn) droplets distributed within primary (Al) interdendritic areas, the segregated pattern of several large L2 blocks enveloped by the Al-rich phase and the layered pattern consisting of top Al-rich zone and bottom Sn-rich zone.

KW - Metals and alloys

KW - Microstructure

KW - Phase transitions

KW - Thermal analysis

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Thermodynamic properties and microstructure evolution of ternary Al-10%Cu-x%Sn immiscible alloys

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Keywords

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