微观结构
材料科学
动态再结晶
层状结构
成核
复合数
复合材料
打滑(空气动力学)
再结晶(地质)
变形(气象学)
变形机理
热加工
化学
热力学
物理
古生物学
生物
有机化学
作者
Jianguo Yang,Shulong Xiao,Yuyong Chen,Lijuan Xu,Xiaopeng Wang,Jing Tian,Dongdong Zhang,Zhaozhu Zheng
标识
DOI:10.1016/j.jallcom.2020.154170
摘要
In this work, the β and (α+β) forging deformation were conducted on (TiB + TiC + Y2O3)/α-Ti composite to investigate the effect of reinforcement on dynamic recrystallization and globularization behavior. During β deformation, the reinforcements not only accelerated discontinuous dynamic recrystallization by particle stimulated nucleation mechanism, but also promoted the heterogeneous nucleation of α phase thus conducted the {0001}α pole figure of composite more widely distributed. However, during (α+β) deformation, the microstructure was characteristic of kinked α colonies morphology. Moreover, compared to matrix, the (TiB + TiC + Y2O3)/α-Ti composite depicted a more homogeneous microstructure and larger crystallography rotation both along or transverse to the α lamellar. The distribution of Schmid factor value indicated that the deformation behavior of matrix showed varies with the α colony while it was more homogeneous in composite. Reinforced with (TiB + TiC + Y2O3) reinforcements, on the one hand, the random SF value of composite conducted the incompatibility slip between adjacent α lamellar thus at last leaded the formation of HABs in inter-lamellar; on the other hand, the reinforcement itself could obstruct dislocation that accelerated the dynamic globularization behavior. Therefore, the (TiB + TiC + Y2O3)/α-Ti composite had a great advantage in optimizing microstructure especially globularization that made the composite of great application prospect.
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