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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Si on the Formation and Growth of Intermetallic Compounds at Roll-Bonded Aluminum-Steel (Al-St) Interface
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Effect of Si on the Formation and Growth of Intermetallic Compounds at Roll-Bonded Aluminum-Steel (Al-St) Interface

机译：Si对轧制铝 - 钢（Al-ST）界面在金属间化合物的形成和生长的影响

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摘要

The formation and growth of intermetallic compounds (IMC) were investigated using the Al-St clad materials with additional different Si content to aluminum and steel substrate by differential scanning calorimetry, scanning electron microscopy and energy-dispersive x-ray spectroscopy, x-ray diffraction and transmission electron microscopy. The addition of Si to Al (Al-0.8Si/St) can drastically delay the formation of IMC and accelerate the growth of IMC layer. The Si (Al-0.8Si/St) segregates at the interface and inhibits the diffusion of Al atom to steel before the IMC forms, which further decreases the diffusion depth of Al in the steel layer. By contrast, the addition of Si to St (Al/St-0.8Si) has limited impact on delaying the formation and decelerating the growth of IMC layer. The Si (Al/St-0.8Si) hardly affects the diffusion of Fe atom to the aluminum layer. Among the four clad materials, the major IMC layer (eta-Fe2Al5) always exhibits the parabolic growth phenomenon. The addition of Si cannot influence the phase compositions of IMC at the interface between the eta-Fe2Al5 layer and the aluminum. However, we observe an extra Fe-rich phase beta (1)-Fe3Al at the interface between the Fe2Al5 layer and steel substrate in the Al-0.8Si/St clad material.
机译：通过差示扫描量热法、扫描电子显微镜、能量色散x射线光谱、x射线衍射和透射电子显微镜，研究了在铝和钢基体上添加不同Si含量的Al-St覆层材料的金属间化合物（IMC）的形成和生长。在Al中添加Si（Al-0.8Si/St）可以显著延缓IMC的形成，加速IMC层的生长。Si（Al-0.8Si/St）在界面处偏析，在IMC形成之前抑制了Al原子向钢的扩散，从而进一步降低了Al在钢层中的扩散深度。相比之下，在St（Al/St-0.8Si）中添加Si对延迟IMC层的形成和减缓IMC层的生长的影响有限。Si（Al/St-0.8Si）几乎不影响Fe原子向铝层的扩散。在四种包层材料中，主要IMC层（eta-Fe2Al5）始终呈现抛物线生长现象。Si的加入不会影响eta-Fe2Al5层和铝之间界面处IMC的相组成。然而，我们在Al-0.8Si/St覆层材料中的Fe2Al5层和钢基体之间的界面上观察到了额外的富铁相β（1）-Fe3Al。

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