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

2011 ◽  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
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

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

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

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.

Mechanical Properties of Cold Worked Type 316L Stainless Steel in High Pressure Gaseous Hydrogen: Investigation of Materials Properties in High Pressure Gaseous Hydrogen—3

2007 ◽  
Author(s):  
Shinichi Ohmiya ◽  
Hideki Fujii
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Stainless Steel ◽  
Room Temperature ◽  
Gaseous Hydrogen ◽  
Type Specimens ◽  
Type 316L ◽  
Piping Systems ◽  
Cold Worked ◽  
Pressure Hydrogen

Safety of on-board high-pressure hydrogen fuel tanks and piping systems in hydrogen refueling station is one of the most important subjects for upcoming hydrogen society featured by fuel cell vehicles. Type 316L austenitic stainless steel is known as a material in which the effect of hydrogen on mechanical properties is very small, so JIS SUS316L is recognized as the standard material for 35MPa type on-board fuel tank liner in the Japanese standard JARI-S001. However, solution treated 316L does not always have sufficient 0.2% proof stress, and materials having higher proof stress are strongly needed. One of the solutions is work-hardening of the material, which is conventionally used for piping systems for high pressure gas facilities. In this study, the effect of hydrogen on mechanical properties of 40% cold worked 316L in high-pressure gaseous hydrogen at 45MPa was investigated. Results are as follows: Any significant effect of hydrogen was not recognized in tensile tests using round bar type specimens at room temperature and 85°C. In axial fatigue life tests using sand glass type specimens (stress ratio R = −1) at room temperature, not so large difference was observed on S-N curves in air and in high pressure hydrogen. However, a little influence was observed in fatigue crack growth tests using half inch CT specimens at room temperature (R = 0.05). Microstructure observation reveals that any martensitic transformation did not occur. The degradation of fatigue crack growth rate in high pressure gaseous hydrogen is probably caused by the work hardened δ-ferrite which is generally contained in thick materials. However the effect of hydrogen is only limited and 40% cold worked type 316L stainless steel is considered to be used in high pressure hydrogen gas just like solution treated one.

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