Hydrogen-induced decomposition of Zr-rich cores in an Mg-6Zn-0.6Zr-0.5Cu alloy

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成果类型：

期刊论文

作者：

Sha, G.*;Zhu, H. M.;Liu, J. W.;Luo, C. P.;Liu, Z. W.;...

通讯作者：

Sha, G.

作者机构：

[Zhu, H. M.; Ringer, S. P.; Liu, Z. W.; Sha, G.] Univ Sydney, ARC Ctr Excellence Design Light Met, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia.

[Luo, C. P.; Zhu, H. M.; Liu, J. W.] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China.

[Zhu, H. M.] Univ S China, Sch Mech Engn, Hengyang 421001, Peoples R China.

通讯机构：

[Sha, G.] U

Univ Sydney, ARC Ctr Excellence Design Light Met, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia.

语种：

英文

关键词：

Decomposition reaction;Hydrogen;Magnesium alloy;Precipitation;Zr-rich cores;Zr-rich hydride

期刊：

Acta Materialia

ISSN：

1359-6454

年：

2012

卷：

期：

页码：

5615-5625

DOI：

10.1016/j.actamat.2012.07.001

基金类别：

This project was supported by the National Basic Research (973) Program of China (No. 2009CB623704), the Nature Science Foundation of Guangdong Province (No. 07006483), the China Scholarship Council and the Australian Research Council Centre of Excellence for Design in Light Metals. Z.L. acknowledges funding support from the Australian Research Council (DP0881700). The authors also acknowledge the facility use and scientific and technical assistance from AMMRF at the University of Sydney, particularly from Drs Dave Mitchell, Ting-Yu Wang and Hongwei Liu.

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本校为其他机构

院系归属：

机械工程学院

摘要：

This study presents the first experimental evidence of a hydrogen-induced decomposition reaction in an Mg-6Zn-0.6Zr-0.5Cu alloy from combined transmission electron microscopy and atom-probe tomography characterization. The reaction takes place due to the presence of H in the Mg matrix, causes the decomposition of pre-existing, high-temperature Zr-Zn intermetallic rods into Zr-rich hydride and β′ (Zn 3Mg 2), and forms novel composite precipitates in the Zr-rich cores of the alloy during ageing at 180 °C. The stoichiometry of the Zr-Zn rods wa...

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Hydrogen-induced decomposition of Zr-rich cores in an Mg-6Zn-0.6Zr-0.5Cu alloy

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