Test Method for Determining Plane-Strain Crack-Arrest Fracture Toughness, KIa, of Ferritic Steels

2018 ◽  
Author(s):  
Keyword(s):  
Fracture Toughness ◽  
Plane Strain ◽  
Crack Arrest ◽  
Test Method ◽  
Ferritic Steels ◽  
Plane Strain Crack

Comparison of the plane strain crack arrest fracture toughness of 4340, 4140, and 1340 steel

1983 ◽  
Vol 14 (7) ◽  
pp. 1459-1465 ◽  
Author(s):  
E. J. Ripling ◽  
J. H. Mulherin ◽  
P. B. Crosley
Keyword(s):  
Fracture Toughness ◽  
Plane Strain ◽  
Crack Arrest ◽  
Plane Strain Crack

Full-Thickness Crack Arrest Fracture Toughness of 9-Percent Ni (ASTM 553, Type 1) Steels

1991 ◽  
Vol 113 (3) ◽  
pp. 375-379
Author(s):  
E. J. Ripling ◽  
P. B. Crosley
Keyword(s):  
Fracture Toughness ◽  
Plane Strain ◽  
Storage Temperature ◽  
Liquid Nitrogen Temperature ◽  
Crack Arrest ◽  
Standard Test ◽  
Pressure Vessels ◽  
Test Method ◽  
Full Thickness ◽  
Large Pressure

Measurements were made of the full-thickness crack arrest fracture toughness (FTCAT) of three 9-percent Ni steels having the range of thicknesses and Charpy V-notch toughnesses of plates now in LNG storage tank service. Unlike the plates used in large pressure vessels, these thinner plates do not crack under a condition of plane strain, so that test method ASTM E1221 “Standard Test Method for Determining Plane-Strain Crack-Arrest Fracture Toughness, Kla, of Ferritic Steels,” was modified for these tests. The toughness of all three steels was measured at liquid nitrogen temperature (−196C), but two of the three were too tough to be measured at LNG storage temperature (−162C). Even the least tough plate had a high enough toughness to arrest long cracks in LNG storage service.

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