Magnetic dynamic process of magnetic layers around grain boundary for sensitized Alloy 600

2010 ◽  
Author(s):  
K. Yamaguchi ◽  
K. Suzuki ◽  
O. Nittono ◽  
T. Uchimoto ◽  
T. Takagi
Keyword(s):  
Grain Boundary ◽  
Dynamic Process ◽  
Alloy 600 ◽  
Magnetic Layers ◽  
Magnetic Dynamic

Magnetic Dynamic Process of Magnetic Layers Around Grain Boundary for Sensitized Alloy 600

2011 ◽  
Vol 47 (5) ◽  
pp. 1118-1121 ◽  
Author(s):  
Katsuhiko Yamaguchi ◽  
Kenji Suzuki ◽  
Osamu Nittono ◽  
Tetsuya Uchimoto ◽  
Toshiyuki Takagi
Keyword(s):  
Grain Boundary ◽  
Dynamic Process ◽  
Alloy 600 ◽  
Magnetic Layers ◽  
Magnetic Dynamic

Examinations of Oxidation and Sulfidation of Grain Boundaries in Alloy 600 Exposed to Simulated Pressurized Water Reactor Primary Water

2013 ◽  
Vol 19 (3) ◽  
pp. 676-687 ◽  
Author(s):  
D.K. Schreiber ◽  
M.J. Olszta ◽  
D.W. Saxey ◽  
K. Kruska ◽  
K.L. Moore ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Atom Probe Tomography ◽  
Atom Probe ◽  
Alloy 600 ◽  
Pressurized Water Reactor ◽  
Intergranular Attack ◽  
Pressurized Water ◽  
Primary Water

AbstractHigh-resolution characterizations of intergranular attack in alloy 600 (Ni-17Cr-9Fe) exposed to 325°C simulated pressurized water reactor primary water have been conducted using a combination of scanning electron microscopy, NanoSIMS, analytical transmission electron microscopy, and atom probe tomography. The intergranular attack exhibited a two-stage microstructure that consisted of continuous corrosion/oxidation to a depth of ~200 nm from the surface followed by discrete Cr-rich sulfides to a further depth of ~500 nm. The continuous oxidation region contained primarily nanocrystalline MO-structure oxide particles and ended at Ni-rich, Cr-depleted grain boundaries with spaced CrS precipitates. Three-dimensional characterization of the sulfidized region using site-specific atom probe tomography revealed extraordinary grain boundary composition changes, including total depletion of Cr across a several nm wide dealloyed zone as a result of grain boundary migration.

scholarly journals The effects of intergranular carbides on the grain boundary oxidation and cracking in a cold-worked Alloy 600

2019 ◽  
Vol 155 ◽  
pp. 209-216 ◽  
Author(s):  
Zhao Shen ◽  
Judith Dohr ◽  
Sergio Lozano-Perez
Keyword(s):  
Grain Boundary ◽  
Alloy 600 ◽  
Cold Worked

Effects of cold working degrees on grain boundary characters and strain concentration at grain boundaries in Alloy 600

2011 ◽  
Vol 53 (3) ◽  
pp. 1137-1142 ◽  
Author(s):  
J. Hou ◽  
Q.J. Peng ◽  
Z.P. Lu ◽  
T. Shoji ◽  
J.Q. Wang ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Cold Working ◽  
Alloy 600 ◽  
Strain Concentration

Monte Carlo simulation for magnetic dynamic process of deformed micro magnetic clusters

2006 ◽  
Vol 42 (4) ◽  
pp. 927-930 ◽  
Author(s):  
K. Yamaguchi ◽  
S. Tanaka ◽  
O. Nittono ◽  
K. Yamada ◽  
T. Takagi
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Dynamic Process ◽  
Magnetic Clusters ◽  
Magnetic Dynamic

AEM analysis of stress corrosion cracks

1995 ◽  
Vol 53 ◽  
pp. 550-551 ◽  
Author(s):  
N. Lewis ◽  
D. J. Perry ◽  
M. L. Bunch
Keyword(s):  
Grain Boundary ◽  
Stress Corrosion ◽  
Corrosion Product ◽  
Cross Section ◽  
Analytical Electron Microscopy ◽  
Alloy 600 ◽  
Key Factors ◽  
Cross Sectional ◽  
Pressurized Water ◽  
Analytical Electron

Cross-sectional analytical electron microscopy (AEM) was used to study stress corrosion cracking (SCC) cracks in pressurized water in an attempt to understand the mechanism of cracking. AEM is particularly well suited to study the crack tip, the crack sides and the corrosion product inside the crack. These analyses provide clues about the stress (i.e., plasticity), the environment (corrosion product) and material (precipitates/grain boundary composition) which are the key factors controlling SCC. In mis investigation SCC cracks were filled with epoxy, dimpled and ion-milled in argon until electron transparent. A cross-section of an SCC crack in Alloy 600 generated in deaerated water is shown in Figure 1. The crack is intergranular and generally propagates down grain boundaries without carbides as shown in Figure 1. The crack seen in Figure 2 is an exception and propagated down a grain boundary containing Cr7C3 carbides. Although dislocations are clearly observed in bom figures, no deformation is observed uniquely associated with the cracks and no voids have been observed ahead of the cracks.

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