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철강재료 변형률속도 경화의 미시적 관찰Microscopic Investigation of the Strain Rate Hardening for Polycrystalline Metals
- Other Titles
- Microscopic Investigation of the Strain Rate Hardening for Polycrystalline Metals
- Issue Date
- 2008
- Publisher
- 한국소성가공학회
- Keywords
- Plastic Dformation; Strain Rte Hrdening; Dislocation Dnsity; Tensile Tst; Electron Bckscattered Dffraction(EBSD); Transmission Eectron Mcroscopy(TEM); Dislocation Bhavior; Plastic Dformation; Strain Rte Hrdening; Dislocation Dnsity; Tensile Tst; Electron Bckscattered Dffraction(EBSD); Transmission Eectron Mcroscopy(TEM); Dislocation Bhavior
- Citation
- 소성가공, v.17, no.1, pp.46 - 51
- Indexed
- KCI
- Journal Title
- 소성가공
- Volume
- 17
- Number
- 1
- Start Page
- 46
- End Page
- 51
- ISSN
- 1225-696X
- Abstract
- Polycrystalline materials such as steels(BCC) and aluminum alloys(FCC) show the strain hardening and the strain rate hardening during the plastic deformation. The strain hardening is induced by deformation resistance of dislocation glide on some crystallographic systems and increase of the dislocation density on grain boundaries or inner grain. However, the phenomenon of the strain rate hardening is not demonstrated distinctly in the rage of 10-2 to 10²/sec strain rate. In this paper, tensile tests for various strain rates are performed in the rage of 10-2 to 10²/sec then, specimens are extracted on the same strain position to investigate the microscopic behavior of deformed materials. The extracted specimens are investigated by using the electron backscattered diffraction(EBSD) and transmission electron microscopy(TEM) results which show the effect of texture orientation, grain size and dislocation behavior on the strain rate hardening.
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