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采用自制的恒位移加载台，在透射电镜(TEM)中原位观察了7075铝合金吸附液体金属(Hg十3％Ga)后加载裂纹前方位错组态的变化以及脆性微裂纹的形核和扩展．结果表明：液体金属吸附后能促进位错的发射、增殖和运动；当吸附促进位错发射和运动达到临界状态时，脆性微裂纹就在原裂纹顶端或在无位错区中形核并解理扩展.
Using a self-made constant displacement loading stage, the dislocation configuration before loading crack and the nucleation and propagation of brittle microcracks were observed by TEM in situ after the 7075 aluminum alloy was adsorbed on liquid metal (Hg + 3% Ga) . The results show that the adsorption of liquid metal can promote the dislocation emission, propagation and movement. When the adsorption promotes the dislocation emission and the movement reaches the critical state, the brittle microcracks nucleate and cleave at the tip of the original crack or in the dislocation free zone Expand.