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damage. Key words: salt rock; time interval; fatigue; acoustic emission; damage; dislocation 现实中的地下工程具有极复杂的受力状态,在盐岩地下储气库的运行过程中,周期性注,采气并非连续循环过程,期间存在长短不一的时间间隔.与普通岩石不同,盐岩具有损伤自愈合的优点,其显著的流变特性[1-4]决定了时间间隔势必会影响...；损伤；位错 中图分类号:TU457 文献标志码:A 文章编号:1672-7207(2017)07-1875-08 Experimental study on character of acoustic emission......
Alloy design by dislocation engineeringM.X.Huang,B.B.HeDepartment of Mechanical Engineering, The University of Hong Kong摘 要:Ultra-high strength alloys... composition(atomic length scale) or manipulating ultra-fine and nano-grained microstructure(grain length scale). The intermediate length scale between atomic and grain scales is the dislocation length scale......
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J. Cent. South Univ. Technol. (2008) 15(s1): 550-554 DOI: 10.1007/s11771-008-419-7 Equilibrium position of misfit dislocation dipole and critical parameters of buried strained nanoscale... model was suggested which describes the generation of the misfit dislocation dipole in the system of the viscoelastic matrix containing a circular stiff nanoscale inhomogeneity. The critical condition......
mechanism for dislocation emission from nanosized grain boundaries[J]. Phys Rev B, 2002, B66: 024101. [18]Derlet P M, Hasnaoui A, van Swygenhoven H. Atomistic simulations as guidance to experiments[J... with the gliding of the partial dislocation, so, it is easy to realize the deformation. When the size of stack dislocations grows up, the local deformation stress ahead of the step gradually become big. When......
A Study on La2O3-Y2O3-Mo Secondary Emission Material 周美玲1,张久兴1,王金淑1,李洪义1,刘娟1,左铁镛1 (1.Key Laboratory of Advanced Functional Materials of Ministry of Education, School of Materials Science... emission coefficients of them aterials were tested. The experimental results show that Mocathodes doped with La2O3,Y2O3 have good secondary emission properties. When the cathodes are activated, the maximal......
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Estimation of SO2 emission factors from copper smelting industry in Yunnan Province, ChinaZHANG Yan(张艳), Tang Xiao-long(唐晓龙), YI Hong-hong(易红宏), MA Jie-yun(马洁云)(College of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China)Abstract:Copper smelting is a significant source of SO2 emission. It is important to quantify SO2 emissions from......
摩擦过程中不同位错原子数目的统计分析 图9 摩擦过程中C~E阶段V形位错发展 Fig. 9 Generation and emission of V shape dislocation during scratch stage C-E characterized by centrosymmetry parameter 上文中针对摩擦阻力曲线峰值点所对应的微观原子组...变化曲线 Fig. 10 Evolution of number of partial dislocation atoms (a) and perfect dislocation atoms on scratch distance (b) 如3.2节所述,通过原子滑移矢量大小sα的判定可计算得到位错滑移相关的应变贡献,而对孪晶迁移相关的变形,采用Tucker[21]的定量化后处理方法来......
