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中文摘要：
建立双向等轴应力条件下纳晶金属三晶交处纳米孔洞增长的理论模型.模型中认为孔洞的增长是由于位错从孔洞表面发射而引起的.通过计算得到了纳米孔洞附近的应力场、位错发射所需的临界应力以及从孔洞表面发射的最大位错数.结果表明：在纳晶金属中,晶界对孔洞的增长起着阻碍作用,晶粒尺寸越小,纳米孔洞越难增长.
英文摘要：
A theoretical model was established to describe the growth of nanovoid at triple junction of nanocrystalline metal under equal biaxial stress. In the model, it was considered that void growth was caused by the emission of dislocations on void surface. Stress field around nanovoid, critical stress required for dislocation emission and maximum number of dislocations emitted from the surface of nanovoid were calculated. Results showed that grain boundary was the obstacle for void growth; the smaller the grain size was, the harder the nanovoid.
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Impact of grain size distribution on the multiscale mechanical behavior of nanocrystalline materials
The evolution of porosity in bulk nanocrystalline materials during plastic deformation and its effec
A mixtures-based model for the grain size dependent mechanical behaviors of nanocrystalline material
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