中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2464-2468.doi: 10.1088/1674-1056/18/6/057

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Experimental verification of Foreman dislocation model

白朴存1, 赵春旺2, 邢永明2   

  1. (1)College of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; (2)College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
  • 收稿日期:2008-07-03 修回日期:2009-01-12 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10862002 and 10562003).

Experimental verification of Foreman dislocation model

Zhao Chun-Wang(赵春旺)a)†, Xing Yong-Ming(邢永明)a), and Bai Pu-Cun(白朴存)b)   

  1. a College of Science, Inner Mongolia University of Technology, Hohhot 010051, China; b College of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
  • Received:2008-07-03 Revised:2009-01-12 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10862002 and 10562003).

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摘要： We present a strain analysis of an edge dislocation core, and a detailed discussion of the Foreman dislocation model. In order to examine the model, the quantitative measurement of strain field around an edge dislocation in aluminum is performed, and high-resolution transmission electron microscopy and geometric phase analysis are employed to map the strain field of the edge dislocation core in aluminum. The strain measurements are compared with the Foreman dislocation model, showing that they are in good agreement with each other when 0.7 ≤ a ≤ 1.5.

关键词: dislocation, strain, high-resolution transmission electron microscopy, geometric phase analysis

Abstract: We present a strain analysis of an edge dislocation core, and a detailed discussion of the Foreman dislocation model. In order to examine the model, the quantitative measurement of strain field around an edge dislocation in aluminum is performed, and high-resolution transmission electron microscopy and geometric phase analysis are employed to map the strain field of the edge dislocation core in aluminum. The strain measurements are compared with the Foreman dislocation model, showing that they are in good agreement with each other when 0.7 ≤ a ≤ 1.5.

Key words: dislocation, strain, high-resolution transmission electron microscopy, geometric phase analysis

中图分类号:  (Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.))

  • 61.72.Ff
61.72.Bb (Theories and models of crystal defects) 61.72.Hh (Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.))