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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.1
- 수록면
- 119 - 127 (9page)
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The phase transition behaviors of non-metallic inclusions as a function of Ti content were investigated bymonitoring changes in the microstructure and mechanical properties of high-strength low-alloy steel multi-pass weld metals. Weld metals with Ti contents ranging from 0.007 to 0.17 wt% were prepared using a gasmetal arc welding process. The inclusion analysis was performed based on thermodynamic calculationsand transmission electron microscopy, accompanied by energy-dispersive spectrometry and selected areaelectron diffraction. With increase in the Ti content of weld metals, the chaotic arrangement of ferrite lathsin the columnar zone was transited to a well aligned arrangement and the impact toughness of the weldmetals drastically deteriorated in response to the decrease in the Mn content of the inclusion. The effec-tive inclusion phase for intragranular nucleation contained considerable amounts of Mn and a Mn depletedzone was observed around the effective nucleant.
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