Tensile failure of stainless-steel notched bars under hydrogen charging
Article Abstract:
Hydrogen embrittlement on 316L stainless steel notch samples shows that their macromechnical behavior remains ductile and multicracking occurs in the area surrounding the notches. The effect of hydrogen damage on tensile failure load are stated by the Notch Extension Model (NEM) and the Notch Cracking Model (NCM). According to NEM, the hydrogen effect is the same as a geometric enlargement of the notch. In NCM, the notch root behaves as a macroscopic crack due to the concentration of a high intensity damage at the notch root.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1996
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An engineering approach to determine the fatigue life of sheet structures under cyclic loading
Article Abstract:
A general procedure for determining the fatigue life of sheet structures under cyclic loading is presented. The procedure uses a two-parameter formulation of the Paris law and is highly capable of estimating the crack shape evolution in the structures. To validate its reliability, it isemployed in computing the fatigue life of a pressure vessel under thermal cyclic loading. Results show that the approach is very useful in studying the various parameters that affect the fatigue life of sheet structures.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1993
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A probabilistic treatment of microstructural effects on fatigue crack growth of large cracks
Article Abstract:
A probabilistic model allows the study of the effect of microstructural changes on fatigue crack growth of large cracks in structural alloys. The model employs a microstructure-based fatigue crack growth law. The law relates the growth rate, dislocation barrier spacing, yield stress, fatigue ductility coefficient, Young's modulus and the dislocation cell size. The application of the model to steels and Ti-alloys are discussed.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1996
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