Stress Corrosion Cracking of Stainless Steel Pipe Weldments in BWR Environment

Y. Lu; K. Sakaguchi; Tetsuo Shoji

doi:10.4028/www.scientific.net/KEM.261-263.1017

Paper Titles

SSRT-CER and Impedance Measurements of Oxide Films on Stainless Steels in Oxygenated High Temperature Water
p.993

Grain Boundary Engineering for the Control of Mechanical Properties and Oxidation-Induced Embrittlement in Silicon Carbides
p.999

Grain Boundary Engineering for Intergranular Corrosion Resistant Austenitic Stainless Steel
p.1005

Measurement of Compositional Profile of ID Facets by FEG-AES and its Relevance to IDSCC of Alloy 182 in a Simulated BWR Environment
p.1011

Stress Corrosion Cracking of Stainless Steel Pipe Weldments in BWR Environment
p.1017

3D-FEM Simulation for EAC Crack Growth Evaluation and its Implication to Specimen Size Effects on Crack Growth Behavior
p.1023

Effect of Physical Property and Chemistry of Water on Cracking of Stainless Steels in Sub-Critical and Supercritical Water
p.1031

Aging of High Speed Train Wheelsets and its Quantitative Characteristics Based on Fracture Mechanics for Optimization of In-Service Inspection
p.1037

Early Detection of the Material Degradation Based on the Integrated Analysis of Diverse Measurement Techniques
p.1043

HomeKey Engineering MaterialsKey Engineering Materials Vols. 261-263Stress Corrosion Cracking of Stainless Steel Pipe...

Stress Corrosion Cracking of Stainless Steel Pipe Weldments in BWR Environment

Abstract:

A System Safety Benchmark Facility (SSBF) was designed and constructed for assessign the crack growth behaviour of welded pipes. Using the SSBF, the effect of flow rate on the SCC susceptibility of 304, 304L and 316L stainless steels was investigated in high temperature water with 2ppm dissolved oxygen. As a result, at a flow rate of 5.5 cm/sec a penetrating crack was found at the Heat Affected Zone (HAZ) of type 304 steel next to the weld metal 182 alloy after 1030 hrs of testing. The maximum crack growth rate was about 6×10^-7mm⋅s^-1. Additionally, the oxide film formed on the inside surface of specimen was examined by Scanning Electron Microscope (SEM), Raman spectroscopy and Electron Spectroscopy for Chemical Analysis (ASCA). A Focus Ion Beam (FIB) technique was used to measure the thickness of the film. The results showed that the composition. morphology, and thickness of the oxide film rate, the types of material, and the existence of HAZ. The implications of the characteristics of the oxide film to SCC susceptibility are discussed.