Fracture-Flow Relationships for A533B Pressure Vessel Steel

1970 ◽  
Vol 92 (2) ◽  
pp. 330-338 ◽  
Author(s):  
J. M. Krafft ◽  
L. R. Hettche ◽  
A. M. Sullivan ◽  
F. J. Loss
Keyword(s):  
Pressure Vessel ◽  
Loading Rate ◽  
Fracture Flow ◽  
Pressure Vessel Steel ◽  
Flow Strength ◽  
Vessel Steel ◽  
Pressure Vessel Steels ◽  
Rapid Loading ◽  
Harmonic Flow ◽  
Spectrum Effect

The large scatter emerging from KIc measurements for heavy walled pressure vessel steels is examined in view of new data for A533B. Extensive plastic flow data at −220 deg F and 80 deg F has revealed a marked, and apparently harmonic, flow strength variation repeated at strain rate intervals in ratio of about 20. The tension skewed path over these ridges is related to the KIc behavior, for which a corresponding variational pattern with loading rate K˙ is observed. The variational pattern, or rate spectrum effect, is large compared to the average speed sensitivity of KIc, suggesting that transition temperatures values could be measured at a more moderate, though rapid, loading rate to avoid the inertial ringing effects of impact.

Influence of the Irradiation Temperature on the Formation of Defects in Reactor Pressure Vessel Steels

1996 ◽  
Vol 439 ◽  
Author(s):  
M. Große ◽  
A. Hempel ◽  
J. Böhmert ◽  
G. Brauer ◽  
F. M. Haggag
Keyword(s):  
Pressure Vessel ◽  
Irradiation Temperature ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steel ◽  
Vessel Steel ◽  
Post Irradiation ◽  
Cu Content ◽  
Reactor Pressure Vessel Steel ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

AbstractTwo heats of reactor pressure vessel steel type A533-B-1 differing in their Cu content (0.07 and 0.14 wt.-%) were irradiated to a fluence of 1* 1018 neutrons/cm2 at temperatures of 60, 121, and 288 °C, respectively. Their microstructure has been studied by SANS, SAXS, and PAS in the asirradiated and post-irradiation annealed stages and compared to the behaviour of unirradiated material and the results are discussed.

scholarly journals Analysis of Surface Roughness Influence in Non-Destructive Magnetic Measurements Applied to Reactor Pressure Vessel Steels

2020 ◽  
Vol 10 (24) ◽  
pp. 8938
Author(s):  
Gábor Vértesy ◽  
Antal Gasparics ◽  
James M. Griffin ◽  
Jino Mathew ◽  
Michael E. Fitzpatrick ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Pressure Vessel ◽  
Magnetic Measurements ◽  
Surface Condition ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steel ◽  
Vessel Steel ◽  
Pressure Vessel Steels ◽  
Non Destructive ◽  
Reactor Pressure

The influence of surface roughness on magnetic measurements of Reactor Pressure Vessel Steels was investigated by applying two types of magnetic, non-destructive measurement on nuclear reactor pressure vessel steel samples: magnetic adaptive testing (MAT) and magnetic Barkhausen noise measurement (MBN). The surface roughness was modified by primary and secondary machine cutting forces. Different settings of machine cutting produced different surface conditions. It was found that for both measurements a monotonic correlation was found to exist between magnetic parameters and surface roughness. Results of the MAT measurements found that the correlation depends on the speed (i.e., on the applied slew rate) of the magnetizing current. In a similar fashion, results from the MBN method show good agreement with MAT, where the response diminishes with an increase in surface roughness. The results show the importance of accounting for surface condition in the interpretation of results of non-destructive magnetic testing.

Dislocation structures in 16MND5 pressure vessel steel strained in uniaxial tension at −196°C

2005 ◽  
Vol 96 (8) ◽  
pp. 909-912
Author(s):  
Karel Obrtlík ◽  
Christian Robertson ◽  
Bernard Marini
Keyword(s):  
Uniaxial Tension ◽  
Pressure Vessel ◽  
Pressure Vessel Steel ◽  
Vessel Steel

scholarly journals Micromagnetic Characterization of Operation-Induced Damage in Charpy Specimens of RPV Steels

2021 ◽  
Vol 11 (7) ◽  
pp. 2917
Author(s):  
Madalina Rabung ◽  
Melanie Kopp ◽  
Antal Gasparics ◽  
Gábor Vértesy ◽  
Ildikó Szenthe ◽  
...  
Keyword(s):  
Neutron Irradiation ◽  
Pressure Vessel ◽  
Operating Conditions ◽  
Magnetic Characteristics ◽  
Pressure Vessel Steel ◽  
Training Procedure ◽  
Vessel Steel ◽  
Before And After ◽  
The Individual ◽  
Magnetic Adaptive Testing

The embrittlement of two types of nuclear pressure vessel steel, 15Kh2NMFA and A508 Cl.2, was studied using two different methods of magnetic nondestructive testing: micromagnetic multiparameter microstructure and stress analysis (3MA-X8) and magnetic adaptive testing (MAT). The microstructure and mechanical properties of reactor pressure vessel (RPV) materials are modified due to neutron irradiation; this material degradation can be characterized using magnetic methods. For the first time, the progressive change in material properties due to neutron irradiation was investigated on the same specimens, before and after neutron irradiation. A correlation was found between magnetic characteristics and neutron-irradiation-induced damage, regardless of the type of material or the applied measurement technique. The results of the individual micromagnetic measurements proved their suitability for characterizing the degradation of RPV steel caused by simulated operating conditions. A calibration/training procedure was applied on the merged outcome of both testing methods, producing excellent results in predicting transition temperature, yield strength, and mechanical hardness for both materials.

Sign in / Sign up

Export Citation Format

Share Document