文档介绍：Journal of Materials Processing Technology xxx (2004) xxx–xxx
Investigation of residual stress and post weld heat treatment of
multi-pass welds by finite element method and experiments
. Cho a,∗, . Lee a, . Moon b, . Van Tyne c
a Division of Mechanical and Information Engineering, South Korea Maritime University, Pusan 606-791, South Korea
b Division of Mechanical Engineering, Pusan National University, Pusan, South Korea
c Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO, USA
Abstract
The residual stress distribution after welding and after a post weld heat treatment have been determined by a finite element transient
heat flow analysis in conjunction with a coupled thermal–mechanical analysis. To verify the numerical results, the surface residual stresses
of a multi-pass butt weld were measured by the hole-drilling technique and pared favourably with the finite element analysis
predictions. The numerical analysis was applied to two multi-pass welds of thick plates used in ship construction—a 12-pass K-groove
weld joint with 56 mm plate, and a nine-pass V-groove weld joint with 32 mm plate. A maximum residual stress of 316 MPa was found in
the 56 mm plate, but was reduced to 39 MPa after the post weld heat treatment.
© 2004 Elsevier . All rights reserved.
Keywords: Welding residual stress; Thermal elast