@inproceedings{7bc974251ff640cca66f920bc22ea9a3,
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°C. 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°C for the weld steel. The results have been compared with finite element studies of elastic-plastic pre-compression and stress relaxation due to creep.",
keywords = "347 stainless steel, Compact tension (CT) specimen, Creep crack initiation, FE-modelling, Neutron diffraction, VAMAS TWA 31",
author = "Wimpory, {R. C.} and Biglari, {F. R.} and R. Schneider and Nikbin, {K. M.} and O'Dowd, {N. P.}",
year = "2006",
doi = "10.4028/0-87849-414-6.311",
language = "English",
isbn = "9780878494149",
series = "Materials Science Forum",
publisher = "Trans Tech Publications Ltd",
pages = "311--316",
editor = "Walter Reimers and S. Quander",
booktitle = "Residual Stresses VII - Proceedings of the 7th European Conference on Residual Stresses, ECRS 7",
note = "7th European Conference on Residual Stresses, ECRS 7 ; Conference date: 13-09-2006 Through 15-09-2006",
}