利用Thermecmastor-Z热模机对6vol%SiC_p/AZ61复合材料初始态和半固态坯料进行压缩变形试验。分析了变形条件对真应力和微观组织的影响。研究表明:在相同应变速率下,随变形温度升高,该复合材料的真应力相应下降,峰值应力和稳态应力明显降低。与半固态复合材料坯料相比,在半固态温度区间(变形温度530℃)进行压缩,初始态复合材料的峰值应力达到17.6 MPa,约为半固态复合材料坯料的1.5倍;在高温固相压缩(变形温度400℃)时,初始态复合材料的峰值应力达75.4 MPa,晶粒局部呈纤维状,变形抗力较高。 The compressive deformation of 6vol% SiCp / AZ61 composite initial and semi-solid billet was carried out by Thermecmastor-Z thermal model machine. The effects of deformation conditions on true stress and microstructure were analyzed. The results show that with the same strain rate, the true stress of the composites decreases correspondingly with the increase of deformation temperature, and the peak stress and steady state stress decrease obviously. Compared with the semi-solid composite, the peak stress of the initial composite reaches 17.6 MPa, which is about 1.5 times of that of the semi-solid composite, at the semi-solid temperature range (deformation temperature 530 ℃) (Deformation temperature 400 ℃), the peak stress of the initial composites reached 75.4 MPa, the grains were locally fibrous and the deformation resistance was high.