Influences of hydrogen on deformation and fracture behaviors of high Zn 7XXX aluminum alloys
| Autor: | Hang Su, Hiroyuki Toda, Md. Shahnewaz Bhuiyan, Akihisa Takeuchi, Kentaro Uesugi, Nobuto Sakaguchi, Yuki Tada, Yoshio Watanabe |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Hydrogen Computational Mechanics Nucleation chemistry.chemical_element 02 engineering and technology 01 natural sciences law.invention law Aluminium 0103 physical sciences 010302 applied physics Synchrotron radiation Metallurgy Microporous material Micropore 021001 nanoscience & nanotechnology Synchrotron Aluminum alloys chemistry Mechanics of Materials Modeling and Simulation Microtomography Fracture (geology) Deformation (engineering) 0210 nano-technology Hydrogen embrittlement |
| Zdroj: | International Journal of Fracture. 200(1/2):13-29 |
| ISSN: | 0376-9429 |
| Popis: | Hydrogen degrades the mechanical properties of high strength 7XXX aluminum alloys in two ways: (i) degrades the mechanical properties by hydrogen embrittlement, and (ii) partitioned into micropores as molecular hydrogen and make contributions to ordinary ductile fracture. The multifaceted effects of hydrogen on the mechanical properties of high Zn content 7XXX aluminum alloys during deformation and fracture is studied by using synchrotron X-ray microtomography. Our results have revealed that the hydrogen susceptibility has increased with increasing the Zn amount. High concentration of hydrogen was induced by the EDM wire eroder. This high concentrated hydrogen induces quasi-cleavage fracture and restricts the growth of micropores during ductile deformation. The threshold concentration of hydrogen ahead of the crack tip for the nucleation of quasi-cleavage feature was estimated to be $$13~\hbox {cm}^{3}/100~\hbox {g Al}$$ . |
| Databáze: | OpenAIRE |
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