研究结果表明：超声波在熔体中产生空化作用，对7055铝合金熔体作超声处理能细化晶粒，提高强度，并能大幅度提高其塑性。
The results show that casting after ultrasonic treatment can obtain finer grain with homogeneous microstructure and higher strength meanwhile acquire strongly improved plasticity of the alloy.
研究结果表明：超声波在熔体中产生空化作用，对7055铝合金熔体作超声处理能细化晶粒，提高强度，并能大幅度提高其塑性。
The results show that casting after ultrasonic treatment can obtain finer grain with homogeneous microstructure and higher strength meanwhile acquire strongly improved plasticity of the alloy.
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