scholarly journals Fatigue crack growth properties of Ni-base alloys in high pressure hydrogen at room temperature.

1989 ◽  
Vol 38 (428) ◽  
pp. 539-545 ◽  
Author(s):  
Seiji FUKUYAMA ◽  
Kiyoshi YOKOGAWA ◽  
Michio ARAKI ◽  
Yukio KOYARI ◽  
Hiroshi AOKI ◽  
...  
Keyword(s):  
High Pressure ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Room Temperature ◽  
Growth Properties ◽  
Pressure Hydrogen

Mechanical Properties of a New Nitrogen-Strengthened Stainless Steel With Reduced Amount of Ni and Mo in High Pressure Gaseous Hydrogen

2013 ◽  
Author(s):  
Kazuhisa Matsumoto ◽  
Shinichi Ohmiya ◽  
Hideki Fujii ◽  
Masaharu Hatano
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
High Strength ◽  
Hydrogen Gas ◽  
Fracture Surfaces ◽  
Growth Properties ◽  
Pressure Hydrogen

To confirm a compatibility of a newly developed high strength stainless steel “NSSC STH®2” for hydrogen related applications, tensile and fatigue crack growth properties were evaluated in high pressure hydrogen gas up to 90MPa. At temperatures between −40 and 85°C, no conspicuous deterioration of tensile properties including ductility was observed even in 90 MPa hydrogen gas at −40°C while strength of STH®2 was higher than SUS316L. Although a slight drop of reduction of area was recognized in one specimen tested in 90 MPa hydrogen gas at −40°C, caused by the segregation of Mn, Ni and Cu in the laboratory manufactured 15mm-thick plate, it was considerably improved in the large mill products having less segregation. Fatigue crack growth rates of STH®2 in high pressure hydrogen gas were almost the same as that of SUS316L in air. Although fatigue crack growth rate in air was considerably decelerated and lower than that in hydrogen gas at lower ΔK region, this was probably caused by crack closure brought by oxide debris formed on the fracture surfaces near the crack tip by the strong contact of the fracture surfaces after the fatigue crack was propagated. By taking the obtained results into account, it is concluded that NSSC STH®2 has excellent properties in high pressure hydrogen gas in addition to high strength compared with standard JIS SUS316L.

scholarly journals Fatigue crack growth of SNCM 439 steel in high pressure hydrogen at room temperature.

1985 ◽  
Vol 34 (381) ◽  
pp. 709-714 ◽  
Author(s):  
Seiji FUKUYAMA ◽  
Kiyoshi YOKOGAWA ◽  
Michio ARAKI
Keyword(s):  
High Pressure ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Room Temperature ◽  
Pressure Hydrogen

On Material Qualification and Strength Design for Hydrogen Service

2015 ◽  
Author(s):  
Junichiro Yamabe ◽  
Hisao Matsunaga ◽  
Yoshiyuki Furuya ◽  
Saburo Matsuoka
Keyword(s):  
High Pressure ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Safety Factor ◽  
Fatigue Testing ◽  
Hydrogen Gas ◽  
Multiplier Method ◽  
Notched Specimens ◽  
Pressure Hydrogen

To clarify the usefulness of the safety factor multiplier method for hydrogen components given in the CHMC1-2014 standard, we performed slow-strain-rate tensile and fatigue testing by using smooth and notched specimens in air and in high-pressure hydrogen gas. We also conducted fatigue-crack growth tests by using compact tension specimens in air and in hydrogen gas. Testing of notched specimens sampled from a Cr–Mo steel gave a safety factor multiplier of 3.0. This value agreed well with that predicted by crack growth analysis taking into account hydrogen-enhanced fatigue-crack growth. The safety factor multipliers of types 304, 316, and 316L austenitic stainless steels were predicted to be 2.0, 1.6, and 1.3, respectively, from their fatigue-crack growth behaviors. The safety factor based on the safety factor multiplier method seems to be overly conservative for the various steels in high-pressure hydrogen gas service. We therefore propose a new and promising design method for specific component applications that is based on design by rule and design by analysis. The importance of operational histories of components for hydrogen service is introduced to permit the precise prediction of their fatigue lives.

scholarly journals Characteristics of Fatigue Life and Fatigue Crack Growth of SCM435 Steel in High-Pressure Hydrogen Gas

2012 ◽  
Vol 78 (788) ◽  
pp. 531-546 ◽  
Author(s):  
Taisuke MIYAMOTO ◽  
Takashi MATSUO ◽  
Nobuo KOBAYASHI ◽  
Yuki MUKAIE ◽  
Saburo MATSUOKA
Keyword(s):  
High Pressure ◽  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Hydrogen Gas ◽  
Scm435 Steel ◽  
Pressure Hydrogen
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