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.
而粗大的晶粒及连续的晶界容易产生应力集中，因此合金经固溶时效后具有较低的塑性和冲击值。
However, large grain size and continuous grain boundaries combine to produce stress concentrations, thus lowering the plasticity and impact value of alloy after solution and aging treatment.
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.
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