高純度アルミニウムおよびA6061アルミニウム合金におけるポアの成長挙動と水素脱離挙動

DOI Web Site 参考文献18件 オープンアクセス

書誌事項

タイトル別名
  • Growth behavior of pores and hydrogen desorption behavior in pure aluminum and A6061 aluminum alloys

説明

<p>An increase in the volume fraction of pores in aluminum alloys causes a decrease in the elongation and the strength of alloys. To improve the mechanical properties of aluminum alloys, it is important to understand the growth and shrinkage behavior of pores. In this study, we analyzed the relationship between hydrogen desorption behavior and the growth/shrinking behavior of pores in A6061 alloys and pure aluminum using thermal desorption analysis and synchrotron radiation X-ray tomography. In pure aluminum, the fine pores began to annihilate at temperatures above 500°C and the relatively large pores coarsened. In contrast, the pores shrank with increasing temperature in A6061 alloy. The influence of second-phase particles has been discussed as a possible explanation for the difference in the nature of pores at elevated temperatures in pure aluminum and A6061 alloys. As in the A6061 alloy, much of the hydrogen desorbed from the pores due to heating is released externally from the second-phase particles on the aluminum surface, resulting in pore shrinkage due to the internal pressure drop of pores.</p>

収録刊行物

  • 軽金属

    軽金属 73 (5), 212-217, 2023-05-15

    一般社団法人 軽金属学会

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