铝合金时效硬化模型的研究进展

相对于众多其他合金,铝合金的时效硬化模型经过近几十年的发展已日趋成熟.利用现有模型可以计算球形、片状和针状析出相的尺寸及体积分数与合金成分、时效时间及时效温度的关系,从而可以研究铝合金的屈服强度在时效过程中的演变规律,对铝合金的设计具有重要的指导意义.该文详细地介绍了铝合金时效硬化模型的发展,并指出了现有模型的不足之处,对模型的未来发展进行了展望.

Research progress of aging hardening model for aluminum alloy

The models for the aging hardening behavior of aluminum alloys are relatively mature after the development of recent tens of years, compared to the other alloys. Among thouse models for other alloy, the best ones can be used to calculate the size and volume fractions of the sphere, disc or needle-shaped precipitates as a function of the alloying composition, aging temperature and aging time nowadays, which results in that the evolution law of the yield strength can be predicated during aging process, and the model itself has important guilding effects on the alloy design. Thus, the development of the aging hardening models is reviewed, their deficiency is pointed out, and their future development is prospected as well in the present paper.