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本文考察了Ｃｕ－Ｚｎ－Ａｌ合金的预贝氏体相变与贝氏体形核。内耗实验表明预贝氏体相变的主要过程为溶质原子扩散、偏聚；能谱分析揭示预贝氏体相变时存在溶质偏聚引起的溶质原子贫化区与富化区；原位观察证实贝氏体于溶质原子贫化区切变形核。
This article examines the Cu-Zn-Al alloy pre-bainitic transformation and bainite nucleation. The internal friction experiments show that the main process of pre-bainite transformation is the diffusion and segregation of solute atoms. The energy spectrum analysis reveals the existence of solute atom depletion zone and enrichment zone caused by solute segregation during the pre-bainite transformation. It was confirmed that bainite was sheathed in solute atom depleted zone.