Fracture toughness of 304 stainless steel in an 8 tesla field

Chan, J.W.; Glazer, J.; Mei, Z.; Kramer, P.A.; Morris, J.W.

doi:10.1016/0956-7151(90)90154-9

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…It is known that low temperature and the presence of a magnetic field increase the driving force for the martensitic transformation in metastable austenitic stainless steels. [6] The results from the martensite measurement appear to exhibit the temperature and magnetic field effects on the transformation behavior. In addition, the martensite phase is brittle, and the brittle zone around the crack tip seems to affect the fatigue crack growth behavior.…”

Section: Resultsmentioning

confidence: 93%

Fatigue Crack Growth Behavior of Metastable Austenitic Stainless Steel in Cryogenic High Magnetic Field Environments

Shindo

Takeda

Suzuki

et al. 2009

Metall Mater Trans A

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YASUHIDE SHINDO, TOMO TAKEDA, MASATO SUZUKI, and FUMIO NARITAThis article studies the fatigue crack growth in a metastable austenitic stainless steel in cryogenic high magnetic field environments. Fatigue crack growth tests were performed with the compact tension (CT) specimens at liquid helium temperature (4 K) in magnetic fields of 0 and 6 T, and the crack growth rate data were expressed in terms of the J-integral range during fatigue loading. The J-integral range values were evaluated using an elastic-plastic finite element analysis. The measurement of martensite phase in the test specimens and the fractographic examination were also carried out. The high magnetic field effect on the fatigue crack growth rate properties at 4 K is discussed in detail.

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Section: Resultsmentioning

confidence: 93%

Fatigue Crack Growth Behavior of Metastable Austenitic Stainless Steel in Cryogenic High Magnetic Field Environments

Shindo

Takeda

Suzuki

et al. 2009

Metall Mater Trans A

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“…Attention has been paid to the influence of magnetic field on deformation, crack, fracture and so on. Chan et al [2,3] and Shindo et al [4] have investigated the fracture properties of stainless steel in high magnetic field at low temperature. Wang et al [5] observed the change in fracture feature of Al2Li alloys containing Ce in magnetic fields.…”

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confidence: 99%

Nucleation of Micro Crack for Brittle Fracture in Magnetic Field

Zhao-Long

Tang

et al. 2010

Chinese Phys. Lett.

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The influence of magnetic field on the nucleation of micro crack for brittle fracture is studied. The dynamic equation of micro crack in magnetic field is deducted. Using the crack model of a single pile-up group of dislocation, the growth speed of micro crack at a low growth speed stage is derived. To understand the effect of the magnetic field on the nucleation, the mean nucleation rate of micro crack in magnetic field is obtained. The derived result on the mean nucleation rate of micro crack shows that the applied magnetic field could change the mean nucleation rate of micro crack. The way in which the mean nucleation rate varies with the field depends not only on the field but also on the magneto properties of material.

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Cryogenic fracture behavior of metastable austenitic stainless steel in a high magnetic field

et al. 2010

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We study the effect of magnetic field on the fracture behavior of the metastable austenitic stainless steels at cryogenic temperatures. Elastic-plastic fracture toughness tests were performed on compact tension specimens in liquid helium at 4 K with and without a magnetic field, and the effect of magnetic field on the cryogenic fracture toughness was discussed. Quantitative phase analysis was also done by magnetic method, and the fracture surfaces were examined by scanning electron microscopy to correlate with the fracture properties.Introduction. Metastable austenitic stainless steels are used in the super-conducting magnet structures. In this application the alloys sustain high stresses in high magnetic fields at liquid helium temperature (4 K). This necessitates complete characterization of the fracture and deformation behavior of these alloys at the anticipated operating conditions. These metastable austenitic stainless steels can undergo strain-induced martensitic transformation at cryogenic temperatures [1]. Also, magnetic fields tend to raise the martensitic transformation temperature and to increase the amount of transformation in ferrous alloys.Fukushima et al.[2] performed the fracture tests on 304 stainless steel using compact tension (CT) specimens precracked at 77 K, and suggested that there may be a significant decrease in the fracture toughness at 4 K in a 9 T magnetic field. Murase et al. [3] also observed that an 8 T magnetic field decreased the 4 K fracture toughness of 304 CT specimens precracked at 77 K. On the other hand, Chan et al.[1] conducted the fracture tests using CT specimens precracked at room temperature (RT) and found that an increase in the fracture toughness of 304 stainless steel tested at 4 K in an 8 T magnetic field was observed relative to the fracture toughness of stainless steel tested in 0 T. They concluded that this improvement is expected as a result of magnetostatic effects and transformation strain differences due to the excess martensite formed within the magnetic field, and the increase in strain hardening rates. The direction of fracture toughness change is influenced both by the stability of the alloys and by the specimen preparation conditions, such as precracking temperature. Further, Chan et al.[4] discussed the fracture behavior of CT specimens made from austenitic stainless steels of differing stability in a 4 K, 8 T magnetic field environment. The least stable alloy showed a large reduction in the 4 K fracture toughness with an 8 T magnetic field, and the amount of fracture toughness reduction with an 8 T magnetic field decreased as the stability of the specimens increased. They found that this difference in fracture behavior is attributed to the enhancement of martensitic transformation about the crack tip during the fracture process in a magnetic field.Recently, Yamaguchi et al.[5] studied the effect of magnetic field on the cryogenic fracture properties in a ferromagnetic austenitic alloy using small punch (SP) and notch tensile specimens. The 4 K fracture...

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Fracture toughness of 304 stainless steel in an 8 tesla field

Cited by 6 publications

References 17 publications

Fatigue Crack Growth Behavior of Metastable Austenitic Stainless Steel in Cryogenic High Magnetic Field Environments

Fatigue Crack Growth Behavior of Metastable Austenitic Stainless Steel in Cryogenic High Magnetic Field Environments

Nucleation of Micro Crack for Brittle Fracture in Magnetic Field

Cryogenic fracture behavior of metastable austenitic stainless steel in a high magnetic field

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