Microstructure of a bulk nanocrystalline Al-Zn-Mg-Cu alloy prepared by cryomilling and spark plasma sintering

CHEN Hanbin; CHENG Junsheng; YANG Bin; ZHANG Jishan; FAN Jianzhong; TIAN Xiaofeng

doi:10.13374/j.issn1001-053x.2007.03.010

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CHEN Hanbin, CHENG Junsheng, YANG Bin, ZHANG Jishan, FAN Jianzhong, TIAN Xiaofeng. Microstructure of a bulk nanocrystalline Al-Zn-Mg-Cu alloy prepared by cryomilling and spark plasma sintering[J]. Chinese Journal of Engineering, 2007, 29(3): 293-297. doi: 10.13374/j.issn1001-053x.2007.03.010

Citation:

CHEN Hanbin, CHENG Junsheng, YANG Bin, ZHANG Jishan, FAN Jianzhong, TIAN Xiaofeng. Microstructure of a bulk nanocrystalline Al-Zn-Mg-Cu alloy prepared by cryomilling and spark plasma sintering[J]. Chinese Journal of Engineering, 2007, 29(3): 293-297. doi: 10.13374/j.issn1001-053x.2007.03.010

Citation:

CHEN Hanbin, CHENG Junsheng, YANG Bin, ZHANG Jishan, FAN Jianzhong, TIAN Xiaofeng. Microstructure of a bulk nanocrystalline Al-Zn-Mg-Cu alloy prepared by cryomilling and spark plasma sintering[J]. Chinese Journal of Engineering, 2007, 29(3): 293-297. doi: 10.13374/j.issn1001-053x.2007.03.010

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Microstructure of a bulk nanocrystalline Al-Zn-Mg-Cu alloy prepared by cryomilling and spark plasma sintering

doi: 10.13374/j.issn1001-053x.2007.03.010

1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;
2. International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China;
3. Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China

Received Date: 2005-12-31
Rev Recd Date: 2006-03-13

Available Online: 2021-08-16

Abstract

Abstract

A bulk nanocrystalline Al-Zn-Mg-Cu alloy was produced by cryomilling and spark plasma sintering. The grain size, the microstrain, phase transformation and microstructure of this alloy were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the bulk nanocrystalline 7000 aluminum alloy prepared by spark plasma sintering has two types of distinctive nanostructures-primarily equiaxed grains with diameters of 50-100 nm, and a few of larger grains with diameters of 200-400 nm. The precipitate of second phases, mainly including η (MgZn₂) and a few θ (Al₂Cu) and S(Al₂CuMg), and recrystallization of the bulk nanocrystalline 7000 aluminum alloy were found during the consolidation process by SPS
- aluminum alloy,
- cryomilling,
- spark plasma sintering,
- microstructure