ON THE USE OF COUPLED PRESSURE BARS TO MEASURE THE DYNAMIC FRACTURE INITIATION AND CRACK PROPAGATION TOUGHNESS OF PRESSURE VESSEL STEELS

1988 ◽  
Vol 49 (C3) ◽  
pp. C3-347-C3-352 ◽  
Author(s):  
H. COUQUE ◽  
S. J. HUDAK ◽  
U. S. LINDHOLM
Keyword(s):  
Crack Propagation ◽  
Dynamic Fracture ◽  
Pressure Vessel ◽  
Fracture Initiation ◽  
Pressure Vessel Steels

Viscoplastic modeling of dynamic fracture events in reactor pressure vessel steels

1992 ◽  
Vol 133 (3) ◽  
pp. 419-431
Author(s):  
B.R. Bass ◽  
J. Keeney-Walker ◽  
S.-J. Chang ◽  
J.S. Parrot ◽  
C.E. Pugh ◽  
...  
Keyword(s):  
Dynamic Fracture ◽  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

The Influence of Load Ratio and Temperature on the Near-Threshold Fatigue Crack Growth Rate Properties of Pressure Vessel Steels

1985 ◽  
Vol 107 (1) ◽  
pp. 26-33 ◽  
Author(s):  
P. K. Liaw ◽  
W. A. Logsdon
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Crack Growth ◽  
Pressure Vessel ◽  
Load Ratio ◽  
Crack Growth Behavior ◽  
Fatigue Crack Propagation Behavior ◽  
Pressure Vessel Steels ◽  
Submerged Arc ◽  
Near Threshold

Near-threshold fatigue crack propagation behavior was examined in four pressure vessel steels (SA508 Cl 2a, SA533 Gr A Cl 2, SA508 Cl 3a, and SA533 Gr B Cl 2) and two submerged arc weldments (SA508 Cl 2a and SA533 Gr A Cl 2). At a given temperature and load ratio, near-threshold crack growth rates in the four base materials and two submerged arc weldments were essentially identical. Increasing the load ratio from 0.20 to 0.50 increased the rate of near-threshold crack propagation at a given temperature. At a fixed load ratio, increasing the temperature from 24 to 288°C (75 to 500°F) increased the rate of near-threshold crack growth. The effects of load ratio and temperature on the near-threshold crack growth behavior of pressure vessel steels can be explained based on a crack closure concept.

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