전위생성에 대한 이론으로서의 응력파 개념에 대한 제안 및 적용 연구

Proposal of the Stress Wave Concept and Its Applied Study as a Theory for the Dislocation Formation

  • 서정현 (경희대학교 기계공학과)
  • 발행 : 2001.10.01

초록

The concept of stress wave was introduced through the quantized kinetic energy which is related to the potentional energy change of atom, molecular bond energy. Differentiated molecular bond energy $\varphi$() by the lst order displacement u becomes force F(F = d$\varphi$($u_i$)/du), if resversely stated, causing physically atomic displacement $u_i$. Such physical phenomena lead stress(force/area of applied force) can be expressed by wave equation of linearly quantized physical property. Through the stress wave concept, formation of dislocation, which could not explained easily from a theory of continuum mechanics, can be explained. Moreover, this linearly quantized stress wave equation with a stress concept for grains in a crystalline solid was applied to three typical metallic microstructures and a simple shape. The result appears to be a product from well treated equations of a quantized stress wave. From this result, it can be expected to answer the reason why the defect free and very fine diameters of long crystalline shapes exhibit ideal tensile strength of materials.

키워드

참고문헌

  1. Metall. Rev. v.6 W. Koster;H. Franz
  2. Mechanical Metallurgy : Hydrostatic and Deviator Components of Stress G. E. Dieter
  3. Journal of Applied Physics v.29 no.4 Production of Dislocations During Growth from the Melt W. A. Tiller
  4. Journal of Applied Physics v.31 no.8 Dislocations in Metal Crystals Grown from the Melt C. Elbaum
  5. Dislocations and Mechanical Properties of Crystals J. J. Gilman;W. G. Johnston
  6. Journal of Applied Physics v.29 no.2 Nucleation of Dislocations Accompanying Electric Breakdown in LiF Crystals J. J. Gilman;D. W. Stauff
  7. Mechanical Metallurgy : Theoretical Cohesive Strength of Metals G. E. Dieter
  8. Phys. Rev. v.79 F. C. Frank;W. T. Read
  9. Journal of Applied Physics v.31 no.4 Dislocation Multiplication in Lithium Fluoride Crystals W. G. Johnston;J. J. Gilman
  10. Journal of Applied Physics v.31 no.12 Production of Dislocation Loops by a Combined Climb and Glide Mechanism J. T. Fourie;H. G. F. Wilsdorf
  11. Trans. of Mat'l Processing v.8 no.6 Thin Steel Roll Forming and Load Analysis 서정현
  12. J. of the Koreans Inst. of Met. & Mater. v.35 no.6 Interface and Mechanical Properties of Ti-Ni Wire reinforced Aluminium Matrix Composites 장동훈;차동득;임수근
  13. J. of the Koreans Inst. of Met. & Mater. v.38 no.5 A Phase Mixture Model on the Elasticity of Nanocrystalline Materials with Pores 장영석;서민홍;김형섭
  14. Acta Metallurgica v.27 Geometrical Effects in the Inho-mogeneous Deformation of Ductile Single Crystals R. J. Asaro
  15. J. of the Koreans Inst.of Met. & Mater. v.35 no.6 Analysis of Microscopic Plastic Behaviors of Metals Considering Slip Deformation of Crystals 김영석;김정석;권오준
  16. Ph.D Dissertation, Clarkson University A Study for the Characteristics of Fe-Mn-Al Steel 서정현