Effects of thermal aging on the fracture toughness of cast stainless steel CF8

2019 ◽  
Vol 173 ◽  
pp. 45-54 ◽  
Author(s):  
David A. Collins ◽  
Emily L. Barkley ◽  
Timothy G. Lach ◽  
Thak Sang Byun
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Thermal Aging ◽  
Cast Stainless Steel

Fracture Toughness of Z3CN20.09M Cast Stainless Steel with Long-Term Thermal Aging

2017 ◽  
Vol 26 (9) ◽  
pp. 4442-4449 ◽  
Author(s):  
Weiwei Yu ◽  
Dunji Yu ◽  
Hongbo Gao ◽  
Fei Xue ◽  
Xu Chen
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Thermal Aging ◽  
Cast Stainless Steel

An evaluation of cast stainless steel (CF8M) fracture toughness caused by thermal aging at 430°C

2002 ◽  
Vol 16 (7) ◽  
pp. 902-910 ◽  
Author(s):  
Jae Do Kwon ◽  
Jae Hyun Ihn ◽  
Joong Cheul Park ◽  
Sung Jong Choi ◽  
Yun Won Park
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Thermal Aging ◽  
Cast Stainless Steel

Fracture Toughness of Aged Stainless Steel Primary Piping and Reactor Vessel Materials

1987 ◽  
Vol 109 (4) ◽  
pp. 440-448 ◽  
Author(s):  
W. J. Mills
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Ductile Fracture ◽  
Thermal Aging ◽  
Fracture Resistance ◽  
Reactor Vessel ◽  
Initiation Toughness ◽  
Second Phase ◽  
Premature Failure ◽  
Fracture Properties

The ductile fracture toughness behavior of FFTF primary piping and reactor vessel construction materials was characterized using the multiple-specimen JR-curve technique before and after 10,000-hr thermal aging treatments. The test materials included Types 304 and 316 stainless steel (SS) and Types 308 and 16–8–2 SS welds. In the unaged condition, these alloys exhibited very high Jc initiation toughness and tearing modulus values at elevated temperatures (427–538°C). The fracture resistance for the 316 SS piping was found to be dependent on orientation; Jc values for the axial (C–L) direction were 60 to 70 percent lower than those for the circumferential (L–C) orientation. The lower fracture properties in the C–L orientation resulted from premature failure of stringers aligned in the axial direction. Thermal aging at 427° C caused no degradation in fracture resistance, while 482 and 566° C agings resulted in a modest 10 to 20 percent reduction in Jc for both base and weld metals. Residual toughness levels after aging are adequate for precluding any possibility of nonductile fracture. Hence, conventional stress and strain limits, such as those provided by the ASME Code, are sufficient to guard against ductile fracture for SS components that have accumulated 10,000-hr exposures at or below 566° C. Metallographic and fractographic examinations revealed that the degradation in fracture properties was associated with aging-induced second-phase precipitation.

CA-6NM

Alloy Digest ◽  
1972 ◽  
Vol 21 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Good Resistance ◽  
Temperature Performance ◽  
Cast Stainless Steel

Abstract CA-6NM is a cast stainless steel that has good resistance to cracking during and after solidification of heavy sections, and good weldability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance, and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-269. Producer or source: Alloy steel foundries.

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