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Investigation of Residual Stress Distributions of Induction Heating Bended Austenitic Stainless Steel (316 Series) Piping

유도 가열 굽힘된 316 계열 오스테나이트 스테인리스 강 배관의 잔류응력 분포 고찰

  • Received : 2014.02.24
  • Accepted : 2014.05.09
  • Published : 2014.07.01

Abstract

The induction heating bending process, which has been recently applied to nuclear piping, can generate residual stresses due to thermomechanical mechanism during the process. This residual stress is one of the crack driving forces that have important effects on crack initiation and propagation. However, previous studies have focused only on geometric shape variations such as the change in thickness and ovality. Moreover, very few studies are available on the effects of process variables on residual stresses. This study investigated the effects of process variables on the residual stress distributions of induction heating bended austenitic stainless steel (316 series) piping using parametric finite element analysis. The results indicated that the heat generation rate and feed velocity have significant effects on the residual stresses whereas the moment and bending angle have insignificant effects.

Keywords

Induction Heating Bending Process;Austenitic Stainless Steel (316) Piping;Residual Stress;Finite Element Analysis

References

  1. Sung Il SIM Co., Ltd., 2013, Qualification Documents for Bending Manufacturing (SA312 TP316 12" Piping).
  2. ASME B&PV Code Committee, 2007, ASME B&PV Code, Sec.II. Part D, Properties, Materials.
  3. JRC, 2004, Protocol for NET Residual Stress Round Robin.
  4. Sikka, V.K., 1978, Elevated Temperature Ductility of Types 304 and 316 Stainless Steel, ORNL/TM-6608.
  5. Lawrence Livermore National Laboratory, 1998, High Temperature Properties of Alloys Being Considered for Design of a Concentric Canister Launcher, UCRL-ID-130924.
  6. AK Steel, Product Data Bulletin, 316/316L Stainless Steel, 316/316L-B- 08-01-07.
  7. http://en.wikipedia.org/wiki/Skin_effect
  8. PS Tech, 2013, Analysis Results for Heat Generation Rate by Induction Heating.
  9. POSCO, Co., Ltd., 2003, Continuous Casting.
  10. ASME B&PV Code Committee, Draft Code Case XXX, 2013.
  11. Sung Il SIM Co., Ltd., 2013, Development of Applicable Induction Heating Bend and Reliability Verification Technology for Safety Related Piping (Class 1,2,3), Research Plan.
  12. USNRC, 2010, Generic Aging Lessons Learned (GALL) Report, NUREG-1801, Rev.2.
  13. Collie, G.C., Higgins, R.J., and Black, I., 2010, "Modelling and Predicting the Deformed Geometry of Thick-Walled Pipes Subjected to Induction Bending," Proceedings of the Institution of Mechanical Engineers, Part L: J. of Materials Design and Applications, Vol.224, pp.177-189. https://doi.org/10.1243/14644207JMDA314
  14. Hu, Z. and Li, L.Q., 1999, "Computer Simulation of Pipe-Bending Processes with Small Bending Radius Using Local Induction Heating," Journal of Materials Processing Technology, Vol. 91, pp.75-79. https://doi.org/10.1016/S0924-0136(98)00425-7
  15. Lee, H.W., 2010, An Optimum Design of Pipe Bending Process Using High Frequency Induction Heating and Dynamic Reverse Moment, M.S. Thesis, Pusan Univ..
  16. Dassault Systems, 2012, Simulia, User's Manuals for ABAQUS, Ver.6.12.