Fracture Toughness Evaluation for Welded Joints of High Strength Steel Through CTOD Test

2010 ◽  
Author(s):  
Jin Gan ◽  
Qiming Yu ◽  
Weiguo Wu ◽  
Jingxia Le
Keyword(s):  
Fracture Toughness ◽  
Test Temperature ◽  
Welded Joints ◽  
High Strength Steel ◽  
Steel Plate ◽  
High Strength ◽  
Bending Tests ◽  
Toughness Evaluation ◽  
Open Displacement ◽  
Fracture Toughness Evaluation

This paper presents the method and procedure of CTOD test which are used for the toughness evaluation for welded joints. Two types of high strength steel (E38 and E43) are chosen as the object of fracture toughness evaluation. The contents of CTOD test include three-point crack tip open displacement (CTOD) bending tests for base metal (BM) specimens, weld position (WP) specimens and heat-affected zone (HAZ) specimens of the high strength steel, considering different thickness of steel plate and different test temperature (−20°C and 20°C). The CTOD test can achieve the P-V curves of samples, and the CTOD values are calculated. On the basis of the above work, the results of toughness evaluation are obtained. Meanwhile, some factors which affect the toughness of high strength steel are discussed in this paper, such as thickness of steel plate and test temperature, and many valuable conclusions are achieved.

Sub-Zero Temperature Fatigue Strength of Butt-Welded Normal and High-Strength Steel Joints for Ships and Offshore Structures in Arctic Regions

2020 ◽  
Author(s):  
Moritz Braun ◽  
Aleksandar-Saša Milaković ◽  
Sören Ehlers ◽  
Adrian Kahl ◽  
Tom Willems ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Fatigue Strength ◽  
Welded Joints ◽  
High Strength Steel ◽  
Material Selection ◽  
High Strength ◽  
Offshore Structures ◽  
International Standards ◽  
Effect Of Temperature ◽  
Selection For

Abstract Ships and offshore structures operating in Artic regions face specific challenges such as ice loads and seasonal low temperatures. In order to meet these extreme environmental requirements, the effect of temperature on material behaviour needs to be considered. It is well known that static material properties (yield strength, fracture toughness etc.) undergo significant changes with temperature. In recent studies, significantly higher fatigue strength was observed in welded joints in comparison to estimates based on international standards. Fatigue strength increased even for temperatures far below the allowed service temperature based on fracture toughness results; however, studies on fatigue strength of structural steel at sub-zero temperatures are scarce. Moreover, material selection for ships and offshore structures is usually based on empirical Charpy and fracture toughness relations at the design temperature, minus a safety margin. This study aims at introducing an S-N curve database for welded joints that can be used to verify the fatigue design approaches for ships and offshore structures subject to sub-zero temperatures. Therefore, the effect of temperature on the fatigue strength of butt-welded normal and high strength steel structures is analysed experimentally for sub-zero temperatures. For this purpose, fatigue test results of SAW and MAG welded joints for temperatures down to −50 °C are analysed and the potential for changes regarding material selection for ships and offshore structures are discussed.

Effect of thickness on the fracture toughness of high strength steel for gas well casings

2018 ◽  
Vol 60 (11) ◽  
pp. 1077-1083 ◽  
Author(s):  
Zhaoming Zhou ◽  
Xishui Guo ◽  
Tiejun Lin ◽  
Desen Mao
Keyword(s):  
Fracture Toughness ◽  
High Strength Steel ◽  
High Strength ◽  
Gas Well

SWEBOR 400

Alloy Digest ◽  
2014 ◽  
Vol 63 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Tensile Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Bend Strength ◽  
Great Strength ◽  
Wear Resistant

Abstract Swebor 400 (hardness 400 HBW) is a high-strength steel with good wear resistant qualities. This alloy is used to endure conditions of extra-heavy wear and when great strength and good weldability is required. This datasheet provides information on composition, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: CS-181. Producer or source: Swebor Stål Svenska AB.

ASTM A710

Alloy Digest ◽  
1990 ◽  
Vol 39 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Precipitation Hardening ◽  
Steel Plate ◽  
High Strength ◽  
Heat Treating ◽  
Low Carbon ◽  
Bethlehem Steel Corporation ◽  
Strength Alloy ◽  
Carbon Precipitation

Abstract ASTM A710 is a low-carbon, precipitation hardening high-strength alloy steel plate. It is well suited to critical applications. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on heat treating and joining. Filing Code: SA-446. Producer or source: Bethlehem Steel Corporation.

DOMEX 110XF

Alloy Digest ◽  
2003 ◽  
Vol 52 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength Steel ◽  
Civil Engineering ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Structural Components ◽  
Very High

Abstract Domex 110XF is a very-high-strength steel that is used for automotive and civil engineering structural components. This datasheet provides information on composition, physical properties, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on heat treating and joining. Filing Code: SA-512. Producer or source: SSAB Swedish Steel Inc.

CRUCIBLE D6

Alloy Digest ◽  
1962 ◽  
Vol 11 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Low Temperature ◽  
High Strength Steel ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance ◽  
Ultra High Strength Steel ◽  
Crucible Steel

Abstract Crucible D6 is a low alloy ultra-high strength steel developed for aircraft-missile applications and primarily designed for use in the 260,000-290,000 psi tensile strength range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on low temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-129. Producer or source: Crucible Steel Company of America.

Sign in / Sign up

Export Citation Format

Share Document