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研究了ZL101合金在-60℃和20℃时拉伸断裂后组织中Si相的断裂行为。结果表明,ZL101合金在低温下拉伸断裂后组织中断裂Si相的数量增加。合金在塑性变形过程中产生大量位错滑移,位错在Si相边界塞积产生应力集中使Si相断裂。随着温度降低,ZL101合金的切变模量增大,导致局部变形区的位错应力场阻力随位错密度增大而上升的趋势加剧,因此,当局部变形较小时,合金在非局部变形区产生大量的位错并滑移,变形均匀性上升。
The fracture behavior of Si phase in ZL101 alloy after tensile fracture at -60 ℃ and 20 ℃ was investigated. The results show that the number of ruptured Si phase in ZL101 alloy increases after tensile fracture at low temperature. The alloy produced a large number of dislocations and slippages during the plastic deformation. The dislocations were concentrated during the plastic deformation of the Si phase to make the Si phase fracture. With the decrease of temperature, the shear modulus of ZL101 alloy increases, which leads to the increase of the dislocation stress field resistance in the local deformation zone. As the local deformation is small, the deformation of the alloy in non-local deformation The area produces a large number of dislocations and slip, deformation uniformity increases.