Experimental and Numerical Investigations on Residual Stresses in a Multi-pass Butt-welded High Strength SM570-TMCP Steel Plate

다국어 초록 (Multilingual Abstract)

During fusion welding process, complex thermal stresses are inevitably generated. The presence of residual stresses can be detrimental to the integrity and the service behavior of the welded part. In this study, both an experiment and a finite element (FE) method were utilized to investigate residual stress distribution in high strength SM570-TMCP (thermo-mechanical controlled process) steel weldment, which was constructed using a multi-pass butt welding process. Firstly, experiments which included a tensile test at elevated temperatures, an observation of the microstructures and a residual stress measurement were carried out to examine characteristics of residual stresses in the weldment. Secondly, a three-dimensional thermo-mechanical FE model was developed to simulate the temperature field and the residual stress field incorporating the experimental results.
The thermo-mechanical model used as well as the experimental procedure is described in detail, and the results obtained from the FE model are compared with the experimental measurements and discussed.

참고문헌 (Reference)

1 Suleyman, G, "The effect of heat treatment on high temperature mechanical properties of microalloyed medium carbon steel" 27 : 1076-1085, 2006

2 Zhang, Z, "Residual stresses in welded moment frames and implications for structural performance" 126 : 306-315, 2000

3 Dong, P, "Residual stresses in strength-mismatched welds and implications on fracture behavior" 64 : 485-505, 1999

4 Chang, K. H, "Residual stresses and fracture mechanics analysis of a crack in welds of high strength steels" 74 : 980-994, 2007

5 Deng, D, "Prediction of welding residual stress in multi-pass butt-welded modified 9Cr- 1Mo steel pipe considering phase transformation effects" 37 : 209-219, 2006

6 Deng, D, "Prediction of welding distortion and residual stress in a thin plate butt-welded joint" 43 : 353-365, 2008

7 Pardo, E, "Prediction of weld pool and reinforcement dimensions of GMA welds using a finite element model" 20 : 937-947, 1989

8 Porter, D., "Performance of TMCP steel with respect to mechanical properties after cold forming and post-forming heat treatment" 81 : 867-877, 2004

9 Abid, M, "Numerical simulation to study the effect of tack welds and root gap on welding deformations and residual stresses of a pipe-flange joint" 82 : 860-871, 2005

10 Deng, D, "Numerical and experimental investigations on welding residual stresses in multi-pass butt-welded austenite stainless steel pipe" 42 : 234-244, 2008

11 Mochizuki, M., "Numerical analysis of welding residual stress and its verification using neutron diffraction measurement" 122 : 98-103, 2000

12 Lee, C. H, "Numerical analysis of residual stresses in welds of similar or dissimilar steel weldments under superimposed tensile loads" 40 : 548-556, 2007

13 Taljat, B., "Numerical analysis of GTA welding process with emphasis on post-solidification phase transformation effects on the residual stresses" 246 : 45-54, 1998

14 Tsay, L. W., "Microstructures and fatigue crack growth of EH36 TMCP steel weldments" 21 : 857-864, 1999

15 "Method of elevated temperature tensile test for steels and heat-resisting alloys"

16 Miki, C., "High strength and high performance steels and their use in bridge structures" 58 : 3-20, 2002

17 Lu, J, "Handbook of measurement of residual stresses" Fairmont Press 1996

18 Lee, H. K., "Fracture resistance of a steel weld joint under fatigue loading" 66 : 403-419, 2000

19 Shin, Y. T., "Fracture characteristics of TMCP and QT steel weldments with respect to crack length" 434 : 364-371, 2006

20 Zhu, X. K, "Effects of temperaturedependent material properties on welding simulation" 80 : 967-976, 2002

21 Tamehiro, H., "Effect of the thermo-mechanical control process on the properties of high strength low alloy steel" 25 : 54-61, 1985

22 Pavier, M. J., "Effect of residual stress around cold worked holes on fracture under superimposed mechanical load" 63 : 751-773, 1999

23 Bjorhovde, R, "Development and use of high performance steel" 60 : 393-400, 2004

24 Lee, C. H, "Computational modelling of the residual stress evolution due to solid-state phase transformation during welding" 16 : 2008