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A Study on the Analysis of Residual Stress in Weldment by Considering the Phase Transformation of Carbon Steel
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 Title & Authors
A Study on the Analysis of Residual Stress in Weldment by Considering the Phase Transformation of Carbon Steel
Jo, Si-Hun; Kim, Jae-Ung;
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 Abstract
Welding process generates distortion and residual stress in the weldment due to rapid heating and cooling. Welding distortion and residual stress in the welded structure result in many troubles such as dimensional inaccuracies in assembling and safety problem during service. The accurate prediction of welding residual stress is thus very important to improve the quality of weldment and find the way to reduce itself. This paper suggests new analysis method to predict welding residual stress by considering solid phase transformation during welding process. Using the method, analysis is performed for medium and low carbon steel. The analysis result for medium carbon steel reveals that case considering phase transformation has compressive residual stress in contrast with the case neglecting phase transformation because of martensite formation. However, for the case of low carbon steel, residual stress shows little difference between the case considering phase transformation and the other case, because it has small transformation strain and recovers rapidly stress after phase transformation.
 Keywords
Phase-Transformation;FEM;Residual Stress;GTA;Pearlite;Ferrite;Martensite;Austenite;
 Language
Korean
 Cited by
1.
저합금 탄소강 배관재의 다층용접 열영향부의 미세조직 및 열이력 해석,김태완;하준욱;김동진;김정태;

대한기계학회논문집A, 2002. vol.26. 3, pp.497-504 crossref(new window)
2.
유한요소법을 이용한 SNCM 합금강의 침탄열처리 공정 해석,최선철;이동재;김헌영;김형종;

대한기계학회논문집A, 2006. vol.30. 10, pp.1284-1292 crossref(new window)
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