scholarly journals Characteristic of Charpy Absorbed Energy for Steel Bridge Member with Fire Damage

2017 ◽  
Vol 35 (2) ◽  
pp. 122s-126s ◽  
Author(s):  
Mikihito Hirohata ◽  
Yasuhito Takashima ◽  
Fumiyoshi Minami
Keyword(s):  
Steel Bridge ◽  
Fire Damage ◽  
Absorbed Energy ◽  
Charpy Absorbed Energy

Charpy Absorbed Energy and JIc as Measures of Cryogenic Fracture Toughness

1992 ◽  
Vol 20 (4) ◽  
pp. 248 ◽  
Author(s):  
D Petersen ◽  
IS Hwang ◽  
MM Morra ◽  
RG Ballinger ◽  
H Nakajima ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Absorbed Energy ◽  
Charpy Absorbed Energy

Mass Production and Installation of X100 Linepipe for Strain-Based Design Application

2008 ◽  
Author(s):  
Nobuyuki Ishikawa ◽  
Mitsuhiro Okatsu ◽  
Shigeru Endo ◽  
Joe Kondo ◽  
Joe Zhou ◽  
...  
Keyword(s):  
Base Metal ◽  
Material Properties ◽  
Mass Production ◽  
High Strain ◽  
Uniform Elongation ◽  
Accelerated Cooling ◽  
Absorbed Energy ◽  
Strain Capacity ◽  
Weld Properties ◽  
Charpy Absorbed Energy

Continuous efforts have been made for the realization of strain-based design pipeline using high grade linepipe materials. Two demonstrative constructions of the pipelines using X100 linepipe proved sufficient materials properties for strain-based design and high quality field welding with good productivity. In order to verify further applicability of high strain X100 linepipe for long distance transmission, large scale installation of X100 pipeline was accomplished. Mass production of X100 linepipe of about 2,000 metric tons with the size of 42″OD and 14.3mm wall thick was successfully conducted by applying recent developed TMCP process including accelerated cooling and online heat treatment process and UOE pipe forming. Field girth welding was safely completed by the dual tandem pulsed GMAW, and sufficient girth weld properties were demonstrated. This paper will describe material development and mass production results of X100 linepipe for strain-based design which specifying longitudinal tensile properties such as Y/T ratio and uniform elongation. In order to securely specify the shape of stress-strain curve without Luders elongation, material parameter “stress ratio” was introduced for the material specification for compressive strain capacity. Stringent base metal requirements were imposed for base metal material properties in this project. One of the most challenging aspects in developing high strain linepipe is to balance uniform elongation and Charpy absorbed energy. Dual phase microstructure is essential to improve strain capacity, but this may lead to lower Charpy absorbed energy. Therefore, precise control of microstructure by controlling plate manufacturing parameter was required. In addition, on-line heating process subsequently after accelerated cooling enabled increase of Charpy energy without deteriorating uniform elongation. Girth weld properties were closely evaluated using the X100 pipe in as UOE condition and after external coating. All the material properties of base metal and girth weldment of the X100 linepipes used for this project fulfill the stringent requirement for strain-based design consideration to prevent buckling and weld fracture.

Correlation Between Charpy Absorbed Energy Using 2 mm and 8 mm Strikers

2011 ◽  
Vol 8 (9) ◽  
pp. 103470 ◽  
Author(s):  
S. W. Dean ◽  
Li Heping ◽  
Zhou Xing ◽  
Xu Weicheng
Keyword(s):  
Absorbed Energy ◽  
Charpy Absorbed Energy

Thermal Aging Behavior of Grade CF3M Cast Austenitic Stainless Steels

2017 ◽  
Author(s):  
Yasufumi Miura ◽  
Takashi Sawabe ◽  
Kiyoshi Betsuyaku ◽  
Taku Arai
Keyword(s):  
Fracture Toughness ◽  
Stainless Steels ◽  
Thermal Aging ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Ferrite Phase ◽  
Absorbed Energy ◽  
Aging Conditions ◽  
Charpy Absorbed Energy

In this study, CASSs which were thermally aged at 275–400°C for up to 30000 hrs were investigated using atom probe tomography, Charpy impact test, hardness test, and fracture toughness test in order to evaluate the effects of chemical composition and ferrite content on thermal aging embrittlement. Test materials were 4 types of statically casted grade CF3M stainless steels which are used in Japanese BWR plants. As a result of the tests, Charpy absorbed energy at room temperature of all thermal aging conditions were obtained. We also obtained the microstructural evolution in ferrite phase, hardness of ferrite phase, and J–R curves of several aging conditions. The fracture toughness and the Charpy absorbed energy of all materials aged at 275°C for up to 15000 hrs were approximately same as those of unaged materials. On the other hand, reduction of the fracture toughness and the Charpy absorbed energy were observed in the materials aged at 300°C, 320°C, 350°C and 400°C. For the Charpy impact test in this study, the absorbed energy of the material with highest molybdenum was lower than that of the material with highest ferrite content. After the tests, the fracture toughness estimation model for grade CF8M in NUREG/CR-4513 and the method in PVP2005-71528 (H3T model) were discussed in order to confirm the applicability of the prediction methods to CF3M.

Sign in / Sign up

Export Citation Format

Share Document