体心立方Fe中微裂纹与间隙型位错环相互作用的分子动力学模拟

梁晋洁, 高宁, 李玉红

Interaction Between Interstitial Dislocation Loop and Micro-Crack in bcc Iron Investigated by Molecular Dynamics Method

LIANG Jinjie, GAO Ning, LI Yuhong

表1 d=15 nm时不同R和k下，有无自由表面位错环被完全吸收所用的模拟时间

Table 1 The simulation time for dislocation loop to be fully absorbed by micro-crack with and without the effect of free surface with d=15 nm under the condition of different R and k(10-3 ns)

k R=1.5 nm R=2.0 nm R=3.0 nm Inside of bulk Free surface Inside of bulk Free surface Inside of bulk Free surface 0.05 11.7 11.4 11.4 12.3 14.7 24.3 0.10 25.2 16.5 Unabsorbed 16.2 Unabsorbed 21.6 0.15 12.6 12.6 15.9 14.7 Unabsorbed 18.9 0.20 10.5 9.9 17.7 15.0 Unabsorbed 15.6 0.25 8.1 7.5 10.5 10.5 14.4 17.7