Effects of high magnetic field on the evolutions of constituent phases in 7085 aluminum alloy during homogenization

Journal Article · Sat Sep 15 04:00:00 EDT 2012 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2012.05.014· OSTI ID:22163121

He, Lizi ^[1]; Li, Xiehua ^[1]; Zhu, Pei; Cao, Yiheng; Guo, Yaping; Cui, Jianzhong ^[1]

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1. Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819 (China)

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), Al{sub 7}Cu{sub 2}Fe, and AlTiCuFeSi are present in as-cast 7085 alloy. During homogenization, {alpha} + T eutectics become discontinuous and spheroidized, and Al{sub 2}CuMg phase nucleates and grows along {alpha} + T eutectics. High magnetic field significantly accelerates the melting of quaternary phase T and Al{sub 2}CuMg phase. When the alloy homogenized at 460 Degree-Sign C/10 h + 480 Degree-Sign C/8 h with 12 T magnetic field, the least amount of constituent phases is obtained. - Highlights: Black-Right-Pointing-Pointer Most of published reports of magnetic field are focused on ferrous alloys. Black-Right-Pointing-Pointer Effect of magnetic field on microstructure of 7085 during homogenization is studied. Black-Right-Pointing-Pointer Magnetic field accelerates the melting of AlZnMgCu and S phase.

• OSTI ID: 22163121
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: Complete Vol. 71; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CALORIMETRY
EUTECTICS
MAGNETIC FIELDS
MELTING
MICROSTRUCTURE
SPECTROSCOPY
X-RAY DIFFRACTION