scholarly journals Impact of High Pressure Hydrogen Atmosphere on the Mechanical Properties of Haynes 282 Superalloy

2012 ◽  
Vol 54 (9) ◽  
pp. 612-618 ◽  
Author(s):  
Matthias Bruchhausen ◽  
Burkhard Fischer ◽  
Peter Hähner ◽  
Sebastian Soller
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Hydrogen Atmosphere ◽  
Pressure Hydrogen

Radiogenic 3He and High-Pressure Hydrogen Impact on Mechanical Properties and Structure of CrNi40MoCuTiAl Alloy

2011 ◽  
Vol 60 (4) ◽  
pp. 1519-1522 ◽  
Author(s):  
I. P. Maksimkin ◽  
A. A. Yukhimchuk ◽  
I. E. Boitsov ◽  
I. L. Malkov ◽  
A. Yu Baurin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Pressure Hydrogen

Hydrogen Compatibility and Suitability of (Ni)-Cr-Mo High-Strength Low-Alloy Seamless Line Pipe Steels for Pressure Vessels for Hydrogen Storage

2018 ◽  
Author(s):  
Akihide Nagao ◽  
Nobuyuki Ishikawa ◽  
Toshio Takano
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Strength ◽  
Pressure Vessels ◽  
Hydrogen Gas ◽  
Low Alloy Steels ◽  
Pipe Steels ◽  
Line Pipe ◽  
Alloy Steels ◽  
Pressure Hydrogen

Cr-Mo and Ni-Cr-Mo high-strength low-alloy steels are candidate materials for the storage of high-pressure hydrogen gas. Forging materials of these steels have been used for such an environment, while there has been a strong demand for a higher performance material with high resistance to hydrogen embrittlement at lower cost. Thus, mechanical properties of Cr-Mo and Ni-Cr-Mo steels made of quenched and tempered seamless pipes in high-pressure hydrogen gas up to 105 MPa were examined in this study. The mechanical properties were deteriorated in the presence of hydrogen that appeared in reduction in local elongation, decrease in fracture toughness and accelerated fatigue-crack growth rate, although the presence of hydrogen did not affect yield and ultimate tensile strengths and made little difference to the fatigue endurance limit. It is proposed that pressure vessels for the storage of gaseous hydrogen made of these seamless line pipe steels can be designed.

Influence of Roughness of Inner Surface of Simple Mechanical Testing Method to Evaluate Influence of High Pressure Hydrogen Gas

2019 ◽  
Author(s):  
Toshio Ogata ◽  
Yoshinori Ono
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Type Specimen ◽  
Hydrogen Gas ◽  
Relative Reduction ◽  
Testing Procedures ◽  
Testing Method ◽  
Inner Surface ◽  
Reduction Of Area ◽  
Pressure Hydrogen

Abstract In order to standardize the simple testing method to evaluate mechanical properties using hollow-type specimen in the high pressure hydrogen gas, influences of the hole and inner surface roughness on the relative reduction of area (RRA) and other properties in slow strain rate tensile (SSRT) tests were investigated on different surface finished specimens at 105 MPa hydrogen gas for SUS316L and JIS SNCM439 steels. There is no influence of the hole and the inner pressure for the yield strength and the tensile strength. The RRA slightly increased in less roughness specimens. So, the axially polished finish for the hollow specimen will be proposed to the standard testing procedures of the SSRT test with this method to evaluate mechanical properties in the high pressure hydrogen gas.

Effects of stress concentration on the mechanical properties of X70 in high-pressure hydrogen-containing gas mixtures

2020 ◽  
Vol 45 (52) ◽  
pp. 28204-28215 ◽  
Author(s):  
Juan Shang ◽  
Jinyang Zheng ◽  
Zhengli Hua ◽  
Yanhua Li ◽  
Chaohua Gu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Stress Concentration ◽  
Gas Mixtures ◽  
Effects Of Stress ◽  
Pressure Hydrogen

Effects of Annealing Parameters on Epitaxial Graphene on SiC Substrates

2019 ◽  
Vol 954 ◽  
pp. 14-20 ◽  
Author(s):  
Yi Wang ◽  
Yun Li ◽  
Zhi Fei Zhao ◽  
Ping Zhou ◽  
Zhi Jun Yin ◽  
...  
Keyword(s):  
High Pressure ◽  
Graphene Layer ◽  
Annealing Temperature ◽  
Epitaxial Graphene ◽  
Hydrogen Atmosphere ◽  
Free Standing ◽  
Hydrogen Annealing ◽  
Carbon Vapor ◽  
Vapor Partial Pressure ◽  
Pressure Hydrogen

The effects of annealing on epitaxial graphene on SiC substrates with various conditions are investigated. Results show that high pressure hydrogen atmosphere is more effective to decouple the epitaxial graphene from SiC substrate than that of a relative lower pressure process. Besides, the characteristic 2D-peak of graphene in Raman spectra disappeared with an annealing temperature 1000 °C, which means that the epitaxial graphene layer was decomposed in this condition. The study also shows that the decomposition of graphene can be effectively suppressed by increasing carbon vapor partial pressure through introducing ethylene during high pressure hydrogen annealing at 1000 °C. And the epitaxial graphene is successfully transferred to quasi free standing graphene by the annealing with an appropriate flow of ethylene.

Hydrogen Embrittlement for X-70 Pipeline Steel in High Pressure Hydrogen Gas

2015 ◽  
Author(s):  
Un Bong Baek ◽  
Hae Moon Lee ◽  
Seung Wook Baek ◽  
Seung Hoon Nahm
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Pipeline Steel ◽  
Fracture Morphology ◽  
Tensile Tests ◽  
Mechanical Tests ◽  
Hydrogen Gas ◽  
Reduction Of Area ◽  
Api 5L X70 Steel ◽  
Pressure Hydrogen

The tensile properties of API 5L X70 pipeline steels have been measured in a high-pressure (10 MPa) hydrogen gas environment. Significant decreases in elongation at failure and reduction of area were observed when testing in hydrogen as compared with air, and those changes were accompanied by noticeable changes in fracture morphology. The present paper exposes the changes in mechanical properties of a grade API 5L X70 steel through numerous mechanical tests, i.e. tensile tests, notch tensile tests, fracture toughness and fatigue crack growth measurements, performed either in atmosphere or in 10 MPa pressure of hydrogen gas.

Sign in / Sign up

Export Citation Format

Share Document