발간논문

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Vol.40, No.4, 383 ~ 388, 2002
Title
Research Papers / Transformations : Electron Irradiation Damage in Welded Part of STS 304 Steel Weldment
배동수Dong Su Bae,정호신Ho Shin Jeong,강창용Chang Young Kang
Abstract
The heat affected zone(HAZ) and matrix of a welded STS 304 steel have been irradiated in an 1250 keV high voltage electron microscope at 673 K and up to 5.4 dpa(displacements per atom) to study the effect of electronbeam irradiation on the microstructure. In-situ observation showed that the voids formed by electron-beam irradiation coalescenced and grew to larger void with irradiation dose. Values of void size, void number density and void swelling percentage in HAZ were greater than those of matrix, and these were increased and then saturated gradually with irradiation dose. Non-equilibrium segregation phenomena such as Cr depletion and Ni enrichment were also observed in both the HAZ and matrix of welded STS304 steel at the grain boundary.
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