Void Swelling in the Iron-Chromium-Nickel System—A Survey by Nickel Ion Bombardment

2009 ◽  
pp. 525-525-18
Author(s):  
WG Johnston ◽  
T Lauritzen ◽  
JH Rosolowski ◽  
AM Turkalo
Keyword(s):  
Ion Bombardment ◽  
Nickel Ion ◽  
System A ◽  
Void Swelling ◽  
Iron Chromium

scholarly journals Radiation damage and phase instability in irradiated stainless steel

1983 ◽  
Vol 41 ◽  
pp. 234-235
Author(s):  
Edward A. Kenik ◽  
Eal H. Lee
Keyword(s):  
Stainless Steel ◽  
Low Dose ◽  
Volume Fraction ◽  
Ion Irradiation ◽  
Dislocation Loops ◽  
Nickel Ion ◽  
Phase Instability ◽  
Void Swelling ◽  
Damage Structure ◽  
The Matrix

The radiation response of metallic alloys can be strongly dependent on specific solute elements. Void swelling and phase instability of the matrix are two primary concerns in the design of nuclear reactors. A 316 stainless steel, LS1A, with greater than nominal levels of silicon and titanium has been developed which exhibits high resistance to swelling under ion irradiation. The origin of this swelling resistance and the roles of silicon and titanium have been investigated in the current study.Figure 1 illustrates the evolution of the damage structure in LS1A under nickel ion irradiation at 625°C. At low dose [∽1 dpa, Fig. 1(a)], faulted interstitial dislocation loops (43-nm-av diam) are observed. We have previously reported that significant solute silicon segregation (approaching 7.0 at. %) in the vicinity of the loop fault plane occurs at such doses in LS1A. Below 10 dpa, precipitates appear to replace the loops in similar sizes and densities. At 70 dpa [Fig. 1(b)] there is no swelling and the matrix phase instability has produced ∽5% volume fraction precipitate.

Nickel-ion bombardment of annealed and cold-worked type 316 stainless steel

1973 ◽  
Vol 48 (3) ◽  
pp. 330-338 ◽  
Author(s):  
W.G. Johnston ◽  
J.H. Rosolowski ◽  
A.M. Turkalo ◽  
T. Lauritzen
Keyword(s):  
Stainless Steel ◽  
Ion Bombardment ◽  
Nickel Ion ◽  
316 Stainless Steel ◽  
Cold Worked

Depth Distribution of Void Swelling Produced by 5 MeV Nickel Ions

1974 ◽  
Vol 32 ◽  
pp. 358-359
Author(s):  
W. G. Johnston ◽  
J. H. Rosolowski ◽  
A. M. Turkalo ◽  
T. Lauritzen
Keyword(s):  
Depth Distribution ◽  
Dose Dependence ◽  
Step Height ◽  
Nickel Ion ◽  
Nickel Ions ◽  
Original Surface ◽  
Void Swelling ◽  
Thin Foils ◽  
Measuring Techniques ◽  
Made In

Our studies of void swelling produced by 5 MeV nickel ion bombardment rely on a theoretically calculated damage curve (Fig. 1). TEM measurements of void swelling are made in thin foils located in the peak damage region (~9000A from the original surface) according to the damage curve. Step-height measurements of swelling1 give the total swelling integrated along the entire ion path and we infer the dose dependence of swelling by assuming the distribution of swelling according to the calculated damage curve. With both measuring techniques the resulting information gives the dependence of swelling (ΔV/Vo) on the displacements per atom (dpa).

Nickel ion bombardment of type 304 stainless steel: Comparison with fast reactor swelling data

1973 ◽  
Vol 47 (2) ◽  
pp. 155-167 ◽  
Author(s):  
W.G. Johnston ◽  
J.H. Rosolowski ◽  
A.M. Turkalo ◽  
T. Lauritzen
Keyword(s):  
Stainless Steel ◽  
Fast Reactor ◽  
Ion Bombardment ◽  
304 Stainless Steel ◽  
Nickel Ion ◽  
Type 304 ◽  
Type 304 Stainless Steel

New Design for a Differentially Pumped Hydration Chamber for a Siemens IA

1971 ◽  
Vol 29 ◽  
pp. 44-45
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Electron Microscopy ◽  
Water Vapor ◽  
Electron Diffraction ◽  
Water Vapor Pressure ◽  
Biological Materials ◽  
Thin Membrane ◽  
Reliable System ◽  
System A ◽  
Water Films ◽  
Aperture Opening

Electron microscopy and diffraction of biological materials in the hydrated state requires the construction of a chamber in which the water vapor pressure can be maintained at saturation for a given specimen temperature, while minimally affecting the normal vacuum of the remainder of the microscope column. Initial studies with chambers closed by thin membrane windows showed that at the film thicknesses required for electron diffraction at 100 KV the window failure rate was too high to give a reliable system. A single stage, differentially pumped specimen hydration chamber was constructed, consisting of two apertures (70-100μ), which eliminated the necessity of thin membrane windows. This system was used to obtain electron diffraction and electron microscopy of water droplets and thin water films. However, a period of dehydration occurred during initial pumping of the microscope column. Although rehydration occurred within five minutes, biological materials were irreversibly damaged. Another limitation of this system was that the specimen grid was clamped between the apertures, thus limiting the yield of view to the aperture opening.

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