High-strength aluminum alloy hydrogen embrittlement may be suppressed

The research team of Kyushu University in Japan conducted 4D observations through the large-scale synchrotron radiation facility SPring-8, and found out the damage mechanism of high-strength aluminum alloys that are widely used in aircraft and other areas.　　 High-strength aluminum alloys are widely used in aerospace and other fields, but due to hydrogen-related damage such as hydrogen embrittlement and stress corrosion cracking, the performance of the aluminum alloy is affected. It has always been believed that the hydrogen embrittlement of aluminum alloys is caused by the microscopic defects of dislocations. However, analysis found that most of the fine particles of materials previously thought not to absorb hydrogen contain hydrogen. As the interface between the fine particles and aluminum peels off, hydrogen embrittlement of aluminum alloys will occur. The study also found that the coarse particles previously thought to be impurities also store hydrogen. Therefore, by generating appropriate coarse particles, the amount of hydrogen in the fine particles can be reduced and hydrogen embrittlement of aluminum alloys can be suppressed. Information source: Japan Agency for the Promotion of Science and Technology Image source: Internet
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