Journal
MATERIALS CHARACTERIZATION
Volume 71, Issue -, Pages 19-23Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2012.05.014
Keywords
High magnetic field; 7085 alloy; Constituent phase; Homogenization; Phase transformation
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Funding
- Fundamental Research Funds for the Central Universities [N100409002]
- Chinese Post-doctorate Science Fund [20100471455]
- State Basic Research Development Program of China [2012CB723307]
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The evolutions of coarse constituent phases in homogenized 7085 aluminum alloy at different conditions with or without the application of 12 T high magnetic field were examined by using differential scanning calorimetry, scanning electronic microscope, energy dispersive spectroscopy and X-ray diffraction. It is found that the main constituent phases including quaternary phase T(AlZnMgCu), Al7Cu2Fe, and AlTiCuFeSi are present in as-cast 7085 alloy. During homogenization, alpha + T eutectics become discontinuous and spheroidized, and Al2CuMg phase nucleates and grows along alpha + T eutectics. High magnetic field significantly accelerates the melting of quatemary phase T and Al2CuMg phase. When the alloy homogenized at 460 degrees C/10 h + 480 degrees C/8 h with 12 T magnetic field, the least amount of constituent phases is obtained. (C) 2012 Elsevier Inc. All rights reserved.
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