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通过对不同状态的7075铝合金以不同的应变速率和不同的应变锻造,并利用了光镜(OM)、透射电镜(TEM)对热变形显微组织进行观察。实验表明:对于 7075铝合金,较高的应变速率有利于出现动态再结晶,动态再结晶的方式为不连续动态再结晶,当应变速率较低时,只出现动态回复。弥散的第二相粒子在动态再结晶过程中起了重要作用。
The 7075 aluminum alloy in different states was forged at different strain rates and different strains, and the microstructure of the hot deformed microstructure was observed by optical microscope (OM) and transmission electron microscope (TEM). Experiments show that for 7075 aluminum alloy, the higher strain rate is conducive to dynamic recrystallization. The dynamic recrystallization method is discontinuous dynamic recrystallization. When the strain rate is low, only dynamic recovery occurs. Diffusive second-phase particles play an important role in dynamic recrystallization.