Mihara-Narita Mami, Asai Konosuke, Sato Hisashi, Watanabe Yoshimi, Nakatsugawa Isao, Saito Naobumi, Chino Yasumasa
Department of Physical Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan.
National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan.
Materials (Basel). 2025 Feb 25;18(5):1013. doi: 10.3390/ma18051013.
Welding of dissimilar magnesium alloys and aluminum alloys is challenging due to the formation of interlayers composed of brittle intermetallic compounds (IMCs) at the bonding interface, which reduces the bonding strength. In our studies, we applied explosive welding to facilitate dissimilar welding of magnesium alloys and aluminum alloys. This method utilized a high-speed impact from an explosive to bond magnesium alloys and aluminum alloys in a short time, effectively suppressing the formation of the interlayer. Our research confirmed the presence of a thin interlayer of the γ-MgAl phase at the interface of the cladding plates. The alloy compositions of both magnesium alloys and aluminum alloys influenced the thickness of this interlayer. Furthermore, annealing of the cladding plates increased the thickness of the interlayer, resulting in the formation of the aluminum-rich β-AlMg phase on the aluminum alloy side after annealing at 473 K. The formation of the brittle β-AlMg phase led to crack initiation, which reduced the shear strength. In terms of corrosion resistance, the corrosion weight loss of the explosively welded cladding plates was slightly less than that of mechanically fastened samples. Therefore, it can be concluded that explosive welding is highly effective for bonding magnesium alloys to aluminum alloys.
由于在结合界面处形成了由脆性金属间化合物（IMC）组成的中间层，异种镁合金和铝合金的焊接具有挑战性，这会降低结合强度。在我们的研究中，我们应用爆炸焊接来促进镁合金和铝合金的异种焊接。该方法利用炸药产生的高速冲击在短时间内将镁合金和铝合金结合在一起，有效抑制了中间层的形成。我们的研究证实，在复合板界面处存在一层薄的γ-MgAl相中间层。镁合金和铝合金的合金成分都会影响该中间层的厚度。此外，复合板的退火增加了中间层的厚度，在473K退火后，在铝合金一侧形成了富铝的β-AlMg相。脆性β-AlMg相的形成导致裂纹萌生，从而降低了剪切强度。在耐腐蚀性方面，爆炸焊接复合板的腐蚀失重略低于机械紧固样品。因此，可以得出结论，爆炸焊接对于将镁合金与铝合金结合非常有效。
