scholarly journals Assessment of Cleavage Fracture in Specimens with a Curved Crack Front for High-Strength Steels in Offshore Applications

2016 ◽  
Vol 2 ◽  
pp. 2046-2053 ◽  
Author(s):  
Xudong Qian ◽  
Shuang Chen ◽  
Aziz Ahmed
Keyword(s):  
Cleavage Fracture ◽  
Crack Front ◽  
High Strength Steels ◽  
High Strength ◽  
Curved Crack

Interrelation between Local and Global Characteristics of Cleavage Fracture

2013 ◽  
Vol 592-593 ◽  
pp. 221-224
Author(s):  
Vladimir Grishchenko ◽  
Sergiy Kotrechko ◽  
Sergey Mamedov ◽  
Oleksandra Zatsarna ◽  
Ivo Dlouhý
Keyword(s):  
Cleavage Fracture ◽  
High Strength Steels ◽  
High Strength ◽  
Fracture Initiation ◽  
Calibration Procedure ◽  
Local Approach ◽  
Notched Specimens ◽  
Distribution Parameters ◽  
Reactor Pressure

The complexity of calibration procedure for determination of Weibull distribution parameters as well as necessity to perform FEM calculations is one of the shortcomings of conventional versions of Local Approach (LA). This report presents an attempt to ascertain interrelation between local and global characteristics of fracture of pre-cracked and notched specimens of reactor pressure vessel steels, high-strength steels etc. Criterion of cleavage fracture initiation ahead of a crack (notch) is formulated. Dimensionless parameter characterizing the effect of embrittlement by the crack or notch is proposed on the basis of this criterion. Based on the findings of low-temperature tests of pre-cracked or notched specimens of structural steels, it is proved that this parameter may be determined by both local and global characteristics.

Effect of Prestrain at Elevated Temperature on the Fracture Behavior of High Strength Steels

1983 ◽  
Vol 105 (1) ◽  
pp. 16-20 ◽  
Author(s):  
K. Satoh ◽  
M. Toyoda ◽  
Y. Mutoh
Keyword(s):  
Elevated Temperature ◽  
Cleavage Fracture ◽  
Fracture Mechanism ◽  
Strain Aging ◽  
Fracture Behavior ◽  
Present Report ◽  
High Strength Steels ◽  
High Strength ◽  
Fracture Initiation ◽  
Initiation And Propagation

It is well known that fracture initiation behavior is influenced by weld thermal straining. In the present report, attention is focused on the influence of weld thermal straining on the fracture mechanism. The influence of prestrain at elevated temperature or strain-aging on the initiation and propagation behaviors of ductile and cleavage fracture in KD32 and HT80 steels is investigated. A relationship between the increase in the lowest temperature at which a tear dimple region can be observed (Ti) or the decrease in stretched zone width and the increase in hardness at the notch tip is found.

Cleavage Fracture of Ultra-High-Strength Steels. Microscopic Observations. Numerical Analysis. Local Fracture Criterion

2014 ◽  
Vol 598 ◽  
pp. 168-177 ◽  
Author(s):  
Andrzej Neimitz ◽  
Ihor Dzioba ◽  
Urszula Janus
Keyword(s):  
Material Property ◽  
Cleavage Fracture ◽  
High Strength Steels ◽  
High Strength ◽  
Critical Value ◽  
Experimental Program ◽  
Fracture Mechanisms ◽  
Specimen Thickness ◽  
Element Analysis ◽  
Ultra High Strength Steels

In the paper the fracture mechanisms in ultra-high-strength steel are examined. However, the emphasis is on cleavage fracture, which was observed in the whole temperature range tested. The extent of cleavage depends on the specimen thickness and temperature. The experimental program consisted of tensile and fracture tests and was followed by scanning microscope observations of the fracture surfaces. Then, a full 3D elastic-plastic finite element analysis was carried out assuming finite strains. The numerical results support the postulate that the onset of cleavage jump is observed when the maximum opening stresses become higher than the critical value (the material property at a given temperature) over a distance greater than the critical value (material property independent of temperature). A discussion of so-called 3D stress parameters is presented.

Features of welding technology for pipes from high-strength steels

2017 ◽  
Vol 7 (6) ◽  
pp. 54-59
Author(s):  
Nikolay G. Goncharov ◽  
◽  
Oleg I. Kolesnikov ◽  
Alexey A. Yushin ◽  
◽  
...  
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Welding Technology

Analysis of the Crack Initiation at Non-Metallic Inclusions in High-Strength Steels

2012 ◽  
Vol 49 (8) ◽  
pp. 468-479 ◽  
Author(s):  
P. Grad ◽  
B. Reuscher ◽  
A. Brodyanski ◽  
M. Kopnarski ◽  
E. Kerscher
Keyword(s):  
Crack Initiation ◽  
High Strength Steels ◽  
High Strength ◽  
Metallic Inclusions

DOGAL 600 and 800 DP

Alloy Digest ◽  
2010 ◽  
Vol 59 (12) ◽  
Keyword(s):  
Tensile Strength ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Strength Steels ◽  
High Strength

Abstract Dogal 600 and 800 DP are high-strength steels with a microstructure that contains ferrite, which is soft and formable, and martensite, which is hard and contributes to the strength of the steel. The designation relates to the lowest tensile strength. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, joining, and surface treatment. Filing Code: CS-160. Producer or source: SSAB Swedish Steel Inc. and SSAB Swedish Steel.

Sign in / Sign up

Export Citation Format

Share Document