Mechanism of detrimental effects of carbon content on cleavage fracture toughness of low-alloy steel

2001 ◽  
Vol 32 (5) ◽  
pp. 1081-1091 ◽  
Author(s):  
J. H. Chen ◽  
G. Z. Wang ◽  
S. H. Hu
Keyword(s):  
Fracture Toughness ◽  
Carbon Content ◽  
Alloy Steel ◽  
Cleavage Fracture ◽  
Low Alloy Steel

Cleavage fracture toughness of tempered martensitic Ni–Cr–Mo low alloy steel with different martensite fraction

2012 ◽  
Vol 534 ◽  
pp. 75-82 ◽  
Author(s):  
Ki-Hyoung Lee ◽  
Sang-Gyu Park ◽  
Min-Chul Kim ◽  
Bong-Sang Lee
Keyword(s):  
Fracture Toughness ◽  
Alloy Steel ◽  
Cleavage Fracture ◽  
Low Alloy Steel ◽  
Martensite Fraction

AISI 1340

Alloy Digest ◽  
1969 ◽  
Vol 18 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Carbon Content ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Heat Treating ◽  
Steel Mills

Abstract AISI 1340 is a carbon-manganese oil hardening steel with greater hardenability than the 1000 and 1100 steels of comparable carbon content, and with poorer machinability than the sulfurized 1100 steels. It is recommended for general engineering and machinery parts such as shafts, gears, axles, fasteners, rollers, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-30. Producer or source: Carbon and alloy steel mills.

A statistical model for cleavage fracture of low alloy steel

1996 ◽  
Vol 44 (10) ◽  
pp. 3979-3989 ◽  
Author(s):  
J.H. Chen ◽  
G.Z. Wang ◽  
H.J. Wang
Keyword(s):  
Statistical Model ◽  
Alloy Steel ◽  
Cleavage Fracture ◽  
Low Alloy Steel

A statistical model for cleavage fracture of low alloy steel

1996 ◽  
Vol 44 (10) ◽  
pp. 3979-3989
Author(s):  
H J.
Keyword(s):  
Statistical Model ◽  
Alloy Steel ◽  
Cleavage Fracture ◽  
Low Alloy Steel

Thermal Aging Assessment and Microstructural Investigations of Alloy 52 Dissimilar Metal Welds for Nuclear Components

2019 ◽  
Author(s):  
Miguel Yescas ◽  
Pierre Joly ◽  
François Roch
Keyword(s):  
Fracture Toughness ◽  
Alloy Steel ◽  
Thermal Aging ◽  
Base Alloy ◽  
Narrow Gap ◽  
Low Alloy Steel ◽  
Nickel Base Alloy ◽  
Pressurized Water ◽  
Dissimilar Metal ◽  
Nickel Base

Abstract Dissimilar Metal Welds (DMW) are commonly found between the ferritic low alloy steel heavy section components and the austenitic stainless steel piping sections in nuclear power plants. In the EPR™ design which is the latest FRAMATOME Pressurized water reactor (PWR) these DMW involve a narrow gap technology with no buttering, and only one bead per layer of a nickel base alloy weld filler metal (Alloy 52). In order to assess the thermal aging performance of this relatively new narrow gap DMW design, a significant internal R&D program was launched some years ago. Several representative mock-ups were thoroughly characterized in the initial condition as well as in the thermal aged condition, up to 50,000 hours aging at 350°C. The characterisations were focused on the fusion line between the ferritic low alloy steel (LAS) and the nickel base alloy since a particular microstructure is present in this area, especially in the carbon depleted area of the Heat Affected Zone (HAZ) which is often regarded as the weak zone of the weld joint. Metallography, hardness, nanohardness, chemical analyses, and Atom Probe Tomography, as well as fracture toughness tests were carried out on different specimens in different thermal aging conditions. The results show that the fracture toughness behaviour in the ductile-brittle domain of the low alloy steel carbon depleted HAZ at the interface with the alloy 52 weld metal of the DMWs is excellent, even for a thermal ageing equivalent to 60 years at service temperature. This was found in spite of the carbon depleted zone of the HAZ, the variations of hardness, chemical composition, particularly the carbon gradients, and the thermal aging effect induced by phosphorous segregation at grain boundaries.

scholarly journals Notch Radius and Specimen Size Effects on Fracture Toughness of Low Alloy Steel

2011 ◽  
Vol 10 ◽  
pp. 1348-1353 ◽  
Author(s):  
Abdel-Hamid I. Mourad ◽  
Aly El-Domiaty
Keyword(s):  
Fracture Toughness ◽  
Alloy Steel ◽  
Size Effects ◽  
Specimen Size ◽  
Low Alloy Steel ◽  
Notch Radius

Fracture Toughness in the Ductile-Brittle Transition and Thermal Ageing Behavior of Decarburized Heat Affected Zone of Alloy 52 Dissimilar Metal Welds of Nuclear Components

2014 ◽  
Author(s):  
Pierre Joly ◽  
Miguel Yescas ◽  
Elisabeth Keim
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Alloy Steel ◽  
Heat Affected Zone ◽  
Power Plants ◽  
Base Alloy ◽  
Thermal Ageing ◽  
Low Alloy Steel ◽  
Dissimilar Metal ◽  
Brittle Transition

Dissimilar metal welds (DMW) are used in nuclear power plants between the nozzles of main components in low alloy steel and stainless steel pipes, or safe-ends connected to the main coolant line pipes. AREVA proposes for EPR™ an improved design of DMW involving narrow gap welding without buttering between the low alloy steel nozzles and the stainless steel safe-ends, and the use of a corrosion resistant weld filler metal (Alloy 52). AREVA performed a thorough characterization of this type of welds, which shows a particular microstructure close to the fusion line between the low alloy steel and the nickel base alloy, where the heat affected zone of the low alloy steel is decarburized. This paper presents results of fracture toughness tests performed with the crack tip located in this area, in the ductile to brittle transition in the as post-welded heat treated condition and after thermal ageing. The results show an excellent fracture toughness behavior of this particular area, compared to that of low alloy steel parent metal.

scholarly journals Shape effect of ultrafine-grained structure on static fracture toughness in low-alloy steel

2012 ◽  
Vol 13 (3) ◽  
pp. 035005 ◽  
Author(s):  
Tadanobu Inoue ◽  
Yuuji Kimura ◽  
Shojiro Ochiai
Keyword(s):  
Fracture Toughness ◽  
Alloy Steel ◽  
Shape Effect ◽  
Low Alloy Steel ◽  
Ultrafine Grained Structure ◽  
Ultrafine Grained ◽  
Static Fracture
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