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在应力一定的蠕变状态下研究了工业铝合金AK4—1合金的超塑性并在该条件下研究了形成气孔和产生断裂的特点。确定了疏松的发展特性与合金的超塑性行为之间的密切关系。研究指出,在最佳的流动条件下发生断裂的安全晶界疏松等级可以达到相当高,即为8％。近年来已经确定,超塑性材料显微组织状态的重要因素是晶界疏松。在许多材料中,如铝青铜、黄铜、不锈钢、
The superplasticity of the industrial aluminum alloy AK4-1 was studied under a certain stress creep condition and the formation of pores and fracture were studied under the conditions. The close relationship between the development of porosity and the superplastic behavior of the alloy was confirmed. The study indicates that the safe grain boundary loosening level that breaks at the best flow conditions can be quite high, ie, 8%. In recent years, it has been determined that an important factor in the microstructure of a superplastic material is loose grain boundaries. In many materials, such as aluminum bronze, brass, stainless steel,