Internal friction in hydrogen-charged CrNi and CrNiMn austenitic stainless steels

1996 ◽  
Vol 27 (7) ◽  
pp. 1815-1821 ◽  
Author(s):  
V. G. Gavriljuk ◽  
H. Hänninen ◽  
S. YU. Smouk ◽  
A. V. Tarasenko ◽  
K. Ullakko
Keyword(s):  
Internal Friction ◽  
Stainless Steels ◽  
Austenitic Stainless Steels

Effect of nitrogen on internal friction of hydrogen charged stable austenitic stainless steels

1993 ◽  
Vol 29 (2) ◽  
pp. 177-182 ◽  
Author(s):  
V.G. Gavriljuk ◽  
H. Hänninen ◽  
A.V. Tarasenko ◽  
K. Ullakko
Keyword(s):  
Internal Friction ◽  
Stainless Steels ◽  
Austenitic Stainless Steels

Internal friction due to hydrogen in austenitic stainless steels

1980 ◽  
Vol 14 (4) ◽  
pp. 377-382 ◽  
Author(s):  
S. Asano ◽  
M. Shibata ◽  
R. Tsunoda
Keyword(s):  
Internal Friction ◽  
Stainless Steels ◽  
Austenitic Stainless Steels

scholarly journals Internal Friction on AISI 304 Stainless Steels with Low Tensile Deformations at Temperatures between−50 and 20C

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
T. F. A. Santos ◽  
M. S. Andrade
Keyword(s):  
Internal Friction ◽  
Stainless Steels ◽  
True Strain ◽  
Austenitic Stainless Steels ◽  
Torsion Pendulum ◽  
Internal Friction Peak ◽  
Aisi 304 ◽  
Degree Of Deformation ◽  
Hexagonal Close Packed ◽  
Damping Behavior

Austenitic stainless steels specimens were deformed by tension in temperatures in the range of−50Cto 20Cand 0.03 to 0.12 true strain, in order to obtain different volumetric fractions ofε(hexagonal close packed) andα′(body centered cubic) strain induced martensites. The morphology, distribution and volumetric fractions of the martensites were characterized by metallography and dilatometry analysis and quantified by ferrite detector measurements. The damping behavior of specimens with different volumetric fractions of martensites was studied in an inverted torsion pendulum in the 40Cto 400Crange. Theε- andα′-martensites reversion was observed in the temperature range of 50C–200Cand 500C–800C, respectively, by dilatometry. Internal friction curves in function of temperature of the deformed samples presented internal friction peaks. The first internal friction peak is related to sum of the amount ofε- andα′-martensites. For low deformations it aligns around 130Cand it is related only to theε→γreverse transformation. The peak situated around 350Cincreases with the specimen degree of deformation and is, probably, related to the presence ofα′/γinterfaces, and deformed austenite.

Radiation Damage Studies with the HVEM

1972 ◽  
Vol 30 ◽  
pp. 680-681
Author(s):  
J. J. Laidler ◽  
B. Mastel
Keyword(s):  
Radiation Damage ◽  
Stainless Steels ◽  
Volume Expansion ◽  
Austenitic Stainless Steels ◽  
Test Facility ◽  
Fast Breeder Reactors ◽  
Breeder Reactors ◽  
Under Construction ◽  
Development Laboratory ◽  
Insight Into

One of the major materials problems encountered in the development of fast breeder reactors for commercial power generation is the phenomenon of swelling in core structural components and fuel cladding. This volume expansion, which is due to the retention of lattice vacancies by agglomeration into large polyhedral clusters (voids), may amount to ten percent or greater at goal fluences in some austenitic stainless steels. From a design standpoint, this is an undesirable situation, and it is necessary to obtain experimental confirmation that such excessive volume expansion will not occur in materials selected for core applications in the Fast Flux Test Facility, the prototypic LMFBR now under construction at the Hanford Engineering Development Laboratory (HEDL). The HEDL JEM-1000 1 MeV electron microscope is being used to provide an insight into trends of radiation damage accumulation in stainless steels, since it is possible to produce atom displacements at an accelerated rate with 1 MeV electrons, while the specimen is under continuous observation.

Strain-induced martensite effects on transgranular carbide precipitation in type 304 stainless steels

1991 ◽  
Vol 49 ◽  
pp. 604-605
Author(s):  
A.H. Advani ◽  
L.E. Murr ◽  
D. Matlock
Keyword(s):  
Heat Treatment ◽  
Grain Boundary ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Deformation Twin ◽  
Austenitic Stainless Steels ◽  
Carbide Precipitation ◽  
Strain Induced Martensite ◽  
Type 304

Thermomechanically induced strain is a key variable producing accelerated carbide precipitation, sensitization and stress corrosion cracking in austenitic stainless steels (SS). Recent work has indicated that higher levels of strain (above 20%) also produce transgranular (TG) carbide precipitation and corrosion simultaneous with the grain boundary phenomenon in 316 SS. Transgranular precipitates were noted to form primarily on deformation twin-fault planes and their intersections in 316 SS.Briant has indicated that TG precipitation in 316 SS is significantly different from 304 SS due to the formation of strain-induced martensite on 304 SS, though an understanding of the role of martensite on the process has not been developed. This study is concerned with evaluating the effects of strain and strain-induced martensite on TG carbide precipitation in 304 SS. The study was performed on samples of a 0.051%C-304 SS deformed to 33% followed by heat treatment at 670°C for 1 h.

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