scholarly journals Fracture toughness and fatigue crack growth of SUS 304 stainless steel in high pressure hydrogen at room temperature.

1987 ◽  
Vol 36 (404) ◽  
pp. 506-512 ◽  
Author(s):  
Seiji FUKUYAMA ◽  
Kiyoshi YOKOGAWA ◽  
Michio ARAKI
Keyword(s):  
Fracture Toughness ◽  
High Pressure ◽  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Room Temperature ◽  
304 Stainless Steel ◽  
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.

Fatigue Crack Growth in a Precipitation-Hardened Martensitic Stainless Steel: Influence of Ageing, Temperature and Loading History

2014 ◽  
Vol 891-892 ◽  
pp. 961-966
Author(s):  
Loic Dimithe Aboumou ◽  
Gilbert Hénaff ◽  
Mandana Arzaghi ◽  
Sylvie Pommier
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Room Temperature ◽  
Martensitic Stainless Steel ◽  
Load Ratio ◽  
Fatigue Crack Growth Resistance ◽  
Variable Amplitude

The 15-5PH (precipitation-hardened) martensitic stainless steel is prone to embrittlement following ageing during service at temperatures between 300°C and 350°C. This results in an increase in strength and a decrease in elongation and fracture toughness. However little information is available on the consequences of long term ageing on fatigue crack growth resistance. In the present study this issue is precisely addressed at room temperature and 300°C, with different load ratio under constant amplitude loading and under variable amplitude loading.At room temperature, the results indicate a marginal effect of the load ratio, regardless of ageing conditions and temperature. While the Paris regime is not affected by ageing, a significant drop in the critical stress intensity value before unstable fracture is observed, reflecting a decrease in fracture toughness of the material with ageing. At 300°C, the FCGRs are higher than at room temperature for all ageing conditions. Variable amplitude loading tests carried out on differently-aged materials showed the same retardation effect.

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

Room Temperature Creep and Its Influence on Fatigue Crack Growth in a 304 Stainless Steel

2005 ◽  
Vol 297-300 ◽  
pp. 1083-1088 ◽  
Author(s):  
Jie Zhao ◽  
Tao Mo ◽  
Weixing Chen ◽  
Fu Gang Wang
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Stress Intensity ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Room Temperature ◽  
304 Stainless Steel ◽  
Propagation Mode ◽  
Temperature Creep ◽  
Room Temperature Creep

The current paper investigated the phenomena of room temperature creep at the crack tip and its influence on fatigue crack growth behavior of a 304 stainless steel. From the experiments, a time-dependent deformation is obviously observed under various stress intensity factors. The deformation depends on stress intensity factor as well as load history. Both acceleration and retardation of fatigue crack growth are found after room temperature creep, which rest on load patterns. A distinct marking line was seen on the fracture surface following the holding period. It is proposed that the crack propagation mode changed after the hold time.

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