Paper Title:
Effect of Residual Stress on High Temperature Deformation in a Weld Stainless Steel
  Abstract

This paper considers the measurement of residual stresses induced by mechanical loading in a weld Type 347 stainless steel. The work is based in part on an ongoing Round Robin collaborative effort by the Versailles Agreement on Materials and Standards, Technical Working Area 31, (VAMAS TWA 31) working on ‘Crack Growth of Components Containing Residual Stresses’. The specific objective of the work at Imperial College London and HMI, Berlin is to examine how residual stresses and prior straining and subsequent relaxation at high temperature contribute to creep crack initiation and growth for steels relevant to power plant applications. Tensile residual stresses have been introduced in the weld by pre-compression and neutron diffraction measurements have been carried out before and after stress relaxation at 650 oC. Significant relaxation of the residual stresses has been observed, in agreement with earlier work on a stainless steel. Preliminary results suggest that the strains local to the crack drop by over 60% after 1000 h relaxation at 650 oC for the weld steel. The results have been compared with finite element studies of elastic-plastic pre-compression and stress relaxation due to creep.

  Info
Periodical
Materials Science Forum (Volumes 524-525)
Edited by
W. Reimers and S. Quander
Pages
311-316
DOI
10.4028/www.scientific.net/MSF.524-525.311
Citation
R. C. Wimpory, F. R. Biglari, R. Schneider, K. M. Nikbin, N.P. O'Dowd, "Effect of Residual Stress on High Temperature Deformation in a Weld Stainless Steel ", Materials Science Forum, Vols. 524-525, pp. 311-316, 2006
Online since
September 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: E. Pineda, M.H. Aliabadi
Abstract:This paper presents the development of a new boundary element formulation for analysis of fracture problems in creeping materials. For the...
109
Authors: Zhi Xun Wen, Nai Xian Hou, Zhu Feng Yue
Abstract:Based on the microstructure change and damage characteristics of single crystal, a two-state-variable crystallographic creep damage...
1322
Authors: Li Hua Zhan, Yan Guang Li, Ming Hui Huang, Jian Guo Lin
Materials Processing Technology
Abstract:In order to study the similarities and dissimilarities between creep and stress relaxation behavior of age formed aluminum alloys, both creep...
772
Authors: Jürgen Malzbender, G. Pećanac, Stefan Baumann
Abstract:Ba0.5Sr0.5Co0.8Fe0.2O3 – δ is a mixed ion-electron conductor with high...
303