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http://dx.doi.org/10.5781/KWJS.2007.25.1.042

A Study on the Prediction of Shrinkage and Residual Stress for the HY-100 Weldment Considering the Phase Transformation  

Lee, Hee-Tae (Industrial Research Institute, Hyundai Heavy Industries Co., Ltd.)
Shin, Sang-Beom (Industrial Research Institute, Hyundai Heavy Industries Co., Ltd.)
Publication Information
Journal of Welding and Joining / v.25, no.1, 2007 , pp. 42-48 More about this Journal
Abstract
For high performance and structural stability, application of high strength steel has continuously increased. However, the change of the base metal gives rise to problems with the accuracy management of the welded structure. It is attributed to the martensite phase transformation of the high strength low alloy steel weldment. The purpose of this study is to establish the predictive equation of transverse shrinkage and residual stress for the HY-100 weldment. In order to do it, high speed quenching dilatometer tests were performed to define a coefficient of thermal expansion(CTE) at the heating and cooling stage of HY-100 with various cooling rates. Uncoupled thermal-mechanical finite element(FE) models with CTE were proposed to evaluate the effect of the martensite phase transformation on transverse shrinkage and residual stresses at the weldment. FEA results were verified by comparing with experimental results. Based on the results of extensive FEA and experiments, the predictive equation of transverse shrinkage and longitudinal shrinkage force at the HY-100 weldment were formulated as the function of welding heat input/in-plane rigidity and welding heat input respectively.
Keywords
HY-100; Phase transformation; Transverse shrinkage; Residual stress; Heat intensity; Finite element analysis(FEA);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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