Download or read book Near Threshold Fatigue Crack Growth in a Microduplex Stainless Steel written by Jonas Wasén and published by . This book was released on 1987 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Crack Growth in a Microduplex Stainless Steel written by Jonas Wasén and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Near threshold Fatigue Crack Growth Behavior of 304 Stainless Steel written by William Barry Zagrany and published by . This book was released on 1987 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Crack Propagation in Microduplex Stainless Steel in 744 written by Clément Lemaignan and published by . This book was released on 1973 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue and Fracture Mechanices written by Steven R. Daniewicz and published by ASTM International. This book was released on 2005-09 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Near Threshold Fatigue Crack Growth in Structural Steels written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmentally Affected Near Threshold Fatigue Crack Growth in Steels written by S. Suresh and published by . This book was released on 1983 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmentally affected fatigue crack propagation in steels is described for ultralow growth rates (below 10-6 mm/cycle) in terms of the role of crack surface corrosion debris in promoting crack closure. It is shown that the reported effects of gaseous and aqueous environments (air, water, hydrogen, helium, etc.) on near-threshold crack growth in lower strength steels are consistent primarily with an oxide-induced crack closure mechanism. Moist atmospheres, such as humid air and water, are shown to promote the formation of oxide deposits within the crack, which at low load ratios are thickened by fretting-assisted oxidation to maximum thicknesses comparable with cracktip opening displacements. Using ultrasonic techniques, this is shown to increase closure loads and to lower effective alternating stress intensities at the crack tip. Observations that near-threshold growth in dry helium is similar to that in dry hydrogen gas and faster than in air, are shown to be consistent with such concepts since both environments provide a dry atmosphere limiting oxide formation. Extensive data on near-threshold corrosion-fatigue crack growth in ultrahigh-strength (300-M) and lower-strength (21⁄4Cr-1Mo and SA516) steels are examined in the context of this mechanism, and it is found that the threshold for no crack growth (?Ko) is consistent with a maximum excess oxide thickness approximately equal to the pulsating crack-tip displacement (?CTOD). The implications of this and other microscopic mechanisms of closure are discussed in the light of microstructural and environmental influences on near-threshold fatigue.

Download or read book Effects of Strength and Grain Size on Near threshold Fatigue Crack Growth in Ultra high Strength Steel written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue tests were performed on ultra-high strength steels to assess (i) the influence of strength at constant grain size, and (ii) the influence of grain size at constant strength, on threshold stress intensity and near-threshold crack propagation rates. The results constitute part of a larger program of research to characterize the microstructural influences on fatigue crack propagation at growth rates less than 10−5 mm/cycle in an attempt to provide a basis for the design of alloys resistant to low growth rate fatigue failure.

Download or read book Near Threshold Fatigue Crack Growth Behavior for 316 Stainless Steel written by WJ. Mills and published by . This book was released on 1987 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth threshold behavior of Type 316 stainless steel was studied in air at 24°C to evaluate the effects of load-shedding rate and specimen geometry on ultra-low crack growth rates. Load-shedding rates greater than the maximum rate recommended in the proposed ASTM test procedure were found to have no substantial effect on the threshold behavior. At very low ?K levels, crack growth rates were apparently dependent on environmental effects and the degree of plastic constraint.

Download or read book NEAR THRESHOLD FATIGUE CRACK PROPAGATION IN FERRITIC STAINLESS STEELS AT ELEVATED TEMPERATURES written by KAMEL MAKHLOUF and published by . This book was released on 1991 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: and without excessive plasticity.

Download or read book Study of Near threshold Fatigue Crack Propagation in Pipeline Steels in High Pressure Environments written by and published by . This book was released on 1981 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Near threshold Fatigue Crack Propagation in Pressure Vessel Steels written by Charles Michael Moss and published by . This book was released on 1979 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanics and Mechanisms of Near Threshold Fatigue Crack Growth in Metals written by Anders F. Blom and published by . This book was released on 1984 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Cold Deformation on the Near threshold Fatigue Crack Growth in Fine grained DP steels written by Jonas Wasén and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Environment and R Ratio on the Near threshold Fatigue Crack Growth Behavior of MOD 9Cr 1Mo 9Cr 2Mo and 2 25Cr 1Mo Steels written by Krishna Murthy Murali and published by . This book was released on 1985 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Crack Closure at Near Threshold Growth Rates in Steels Effects of Microstructure Load Sequence and Environment written by Michael K. Schaper and published by . This book was released on 2012 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper summarizes long-term research on fatigue crack closure in several labs of the author. Various experimental techniques were used in different combinations. Primarily, a sophisticated dynamic compliance technique based on highly sensitive resonance vibration measurements and crack tip diffracted ultrasonic wave analysis is applied. Whereas the first method reflects the global through thickness behavior, the second method enables spatial resolution, which is achieved with a reduction of sensitivity yet has the advantage that the signal generation is independent on the stress state ahead of the crack tip. The results allow a coherent view into the effects of the stress state, material plasticity, fracture surface roughness, and oxidation tendency on the closure behavior and, therefore, on both the threshold stress intensity and near-threshold crack propagation. Specifically, the different load ratio, load sequence, and the environmental effects on the threshold values of ferritic, martensitic, and austenitic steels are addressed.

Download or read book Fatigue Crack Propagation in the Intermediate and Near threshold Growth Regions of Several Low to Medium Strength Steels written by John A. Lewis and published by . This book was released on 1982 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: