本文研究了不同的形变时效处理对LY 12铝合金应力腐蚀开裂性能的影响。
The effect of different deformation-aging treatments on the stress corrosion cracking of LY12 aluminum alloy was studied.
分级时效处理，低温下先让合金内部的宏观应力松弛，再在较高温度下时效，可有效地避免棒材纵向开裂。
However, stepped aging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
结果发现，时效造成的沿晶析出及伴随产生的沉淀物无析出带是促使合金发生沿晶开裂的主要因素。
The results show that the precipitates on the grain boundaries and precipitate free zone (PFZ) were the main factor to enhance the intergranular crack of the alloy.
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