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2101Al-Mg合金是我国根据船舶工业需要创制的一种新型合金,该合金具有中等强度、良好的耐蚀性和优良的焊接性。性能试验和电镜观察表明,综合性能的改善与形变度和稳定化处理工艺密切相关。变形量约50％的中温压延板经255±10℃/2h低温稳定化退火后,合金已处于回复和再结晶初始阶段。合金中位错从高密杂乱分布变为有序排列,形成低能态的位错网络,构成规则的亚晶界。β相颗粒呈棒状沿轧向排列,长向尺寸约0.3μm,宽为0.05μm,颗粒尺寸比较均匀,β相在亚晶界内部和界壁均有分布,未发现对腐蚀敏感的晶界连续沉淀网膜。
2101Al-Mg alloy is a new type of alloy developed by our country according to the need of shipbuilding industry. The alloy has medium strength, good corrosion resistance and excellent weldability. Performance tests and electron microscopy observations show that the overall performance improvement is closely related to the degree of deformation and the stabilization process. After deformation of about 50% of the temperature calendered plate by 255 ± 10 ℃ / 2h low temperature stabilization annealing, the alloy has been in the initial stage of recovery and recrystallization. Dislocations in the alloy change from high-density disorderly distribution to ordered arrangement, forming a dislocation network with low energy state and forming a regular subgrain boundary. The β phase particles are arranged in a rod shape along the rolling direction. The lengthwise dimension is about 0.3 μm, the width is 0.05 μm, and the particle size is relatively uniform. The β phase is distributed within the subgrain boundaries and the boundary walls. No continuous corrosion-sensitive grain boundaries are found Precipitated omentum.