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Stress corrosion cracking behavior of warm forged 316L stainless steel at different orientations

Published on Aug 1, 2019in Journal of Nuclear Materials 2.55
· DOI :10.1016/j.jnucmat.2019.05.031
Donghai Du4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Jiamei Wang5
Estimated H-index: 5
(SJTU: Shanghai Jiao Tong University)
+ 1 AuthorsLefu Zhang11
Estimated H-index: 11
(SJTU: Shanghai Jiao Tong University)
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Abstract
Abstract Stress corrosion cracking (SCC) behavior of ∼20% warm forged 316L stainless steel (SS) round bar was evaluated for different cracking orientations relative to the applied deformation in hydrogenated and oxygenated high purity water at 325 °C. Different SCC crack growth rates (CGRs) obtained at three orientations demonstrates that the L-R orientation where cracking occurred in the plane of deformation has the highest SCC susceptibility, while the C-L orientation where cracking was oriented to run along the forging direction has the lowest SCC susceptibility. The anisotropic cracking behavior of warm forged 316L SS at different orientations, which is prominent in hydrogenated water, depends highly on the distribution of lamellar plastic strains that are produced during deformation in different planes.
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References23
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Published on Sep 1, 2016in Corrosion Science 6.36
Donghai Du4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University)
+ 4 AuthorsPeter L. Andresen19
Estimated H-index: 19
(GE: General Electric)
Abstract Cold work of materials, dissolved oxygen and chloride in water are crucial factors that accelerate the stress corrosion cracking (SCC) crack growth rate of stainless steel in high temperature water. Cold worked austenitic stainless steel type 316 and 316L were studied in order to obtain their effects on SCC crack growth rates in 288 and 325 °C water. Similar SCC behavior were identified for 316 and 316L. Cold working induced comparatively high crack growth rate up to 10 −8 mm/s even in ...
Published on Sep 1, 2016in Acta Metallurgica Sinica (english Letters) 1.83
Hongliang Ming8
Estimated H-index: 8
(CAS: Chinese Academy of Sciences),
Zhiming Zhang14
Estimated H-index: 14
(CAS: Chinese Academy of Sciences)
+ 4 AuthorsMingxing Su2
Estimated H-index: 2
Austenitic stainless steels are usually chosen to make many components of nuclear power plants (NPPs). However, their microstructure in the heat-affected zone (HAZ) will change during the welding process. Some failures of the weld joints, mainly stress corrosion cracking (SCC), have been found to be located in the HAZ. In this research, the microstructure, micro-hardness, residual strain and SCC behavior at different locations of the 316L HAZ cut from a safe-end dissimilar metal weld joint were ...
Published on Apr 1, 2016in Journal of Nuclear Materials 2.55
Junjie J. Chen1
Estimated H-index: 1
(SHU: Shanghai University),
Zhanpeng P. Lu1
Estimated H-index: 1
(SHU: Shanghai University)
+ 5 AuthorsTetsuo Shoji29
Estimated H-index: 29
(Tohoku University)
Abstract Stress corrosion cracking behaviors of one-directionally cold rolled 316L stainless steel specimens in T–L and L–T orientations were investigated in hydrogenated and deaerated PWR primary water environments at 310 °C. Transgranular cracking was observed during the in situ pre-cracking procedure and the crack growth rate was almost not affected by the specimen orientation. Locally intergranular stress corrosion cracks were found on the fracture surfaces of specimens in the hydrogenated P...
Published on Sep 1, 2015in Corrosion 1.86
Sung-Woo Kim7
Estimated H-index: 7
,
Seong-Sik Hwang5
Estimated H-index: 5
,
Jae-Min Lee1
Estimated H-index: 1
This article undertakes an investigation of the stress corrosion crack growth behavior of a cold-rolled Alloy 690 (UNS N06690) with microstructural inhomogeneity in the primary water of a pressurized water reactor, and ascertains the relationship between this behavior and the local distribution of the residual strain. Stress corrosion cracking (SCC) was found to propagate in a transgranular mode through a banded region composed of intragranular carbides and small-sized grains, and in an inter-gr...
Published on Jan 1, 2015in Journal of Nuclear Materials 2.55
Donghai Du4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University),
Kai Chen4
Estimated H-index: 4
(SJTU: Shanghai Jiao Tong University)
+ 4 AuthorsXuelian Xu2
Estimated H-index: 2
Abstract Many component failures in nuclear power plants were found to be caused by stress corrosion cracking (SCC) of cold worked austenitic steels. Some of the pressure boundary component materials are even cold worked up to 35% plastic deformation, leaving high residual stress and inducing high growth rate of corrosion crack. Controlling water chemistry is one of the best counter measure to mitigate this problem. In this work, the effects of temperature (200 up to 325 °C) and dissolved oxygen...
Olivier Lavigne9
Estimated H-index: 9
(University of Adelaide),
Erwin Gamboa6
Estimated H-index: 6
(University of Adelaide)
+ 3 AuthorsWalter Costin5
Estimated H-index: 5
(University of Adelaide)
Abstract Intergranular stress corrosion cracking (IGSCC) crack paths usually travel perpendicular to the applied load direction. Some instances of crack paths propagating in directions away from the perpendicular have been observed in low carbon steels. This study shows that the crystallographic texture is a critical factor that drives the IGSCC crack path. Residual shear strain induced by shear texture (induced by rolling processes) explains the inclination of the cracks at a certain depth and ...
Published on Sep 1, 2014in Corrosion Science 6.36
Seiji Yaguchi2
Estimated H-index: 2
(MHI: Mitsubishi Heavy Industries),
Toshio Yonezawa7
Estimated H-index: 7
(Tohoku University)
Abstract Intergranular Stress Corrosion Cracking (IGSCC) growth observed perpendicular to the plane of fatigue pre-cracks in T–L oriented compact tension specimens made of highly cold-rolled Type 316 stainless steel has been investigated metallurgically. One-directional cold rolling resulted in significant lamellar local strains on the plane parallel to the rolling plane. Oxide was detected along intergranular crack. It is deduced that intergranular cracking was due to selective oxidation and en...
Published on Oct 1, 2013in Corrosion 1.86
Peter L. Andresen19
Estimated H-index: 19
(GE: General Electric)
This paper summarizes the structural materials used in light water reactors (LWR), their historical degradation evolution vs. time, improvements and subsequent vulnerabilities discovered, and possible future degradation phenomena over long-term operation. Little was known about high-temperature water environments 50+ years ago, and reasonable but inadequate judgments were made on structural materials based partly on simple, short-term tests and partly on intuition of low-temperature corrosion ph...
Published on Oct 1, 2013in Corrosion 1.86
Stephen M. Bruemmer26
Estimated H-index: 26
(PNNL: Pacific Northwest National Laboratory),
Matthew J. Olszta11
Estimated H-index: 11
+ 1 AuthorsLarry E. Thomas11
Estimated H-index: 11
Grain boundary microstructures and microchemistries are examined in cold-rolled Alloy 690 (UNS N06690) materials and comparisons are made to intergranular stress corrosion cracking (IGSCC) behavior in pressurized water reactor (PWR) primary water. Chromium carbide precipitation is found to be a key aspect for materials in both the mill-annealed and thermally treated conditions. Cold rolling to high levels of reduction was discovered to produce small IG voids and cracked carbides in alloys with a...
Published on Apr 1, 2012in Journal of Nuclear Materials 2.55
Zhanpeng Lu16
Estimated H-index: 16
(Tohoku University),
Tetsuo Shoji29
Estimated H-index: 29
(Tohoku University)
+ 4 AuthorsKoji Negishi2
Estimated H-index: 2
(Tohoku University)
Abstract Stress corrosion cracking growth during long-term test in high temperature water was monitored in two 316NG weld heat-affected zones representing highly hardened and medially hardened regions. Cracking near the weld fusion line exhibited both macroscopic bifurcation and extensive microscopic branching, which was faster than that in the medially hardened region where crack kinking was observed. There is an interaction between material hardening and dissolved oxygen on crack growth. The e...
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