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Book Influence of Sodium on the Low cycle Fatigue Behavior of Types 304 and 316 Stainless Steel

Download or read book Influence of Sodium on the Low cycle Fatigue Behavior of Types 304 and 316 Stainless 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 in sodium were conducted to investigate the influence of a high-temperature sodium environment on the low-cycle fatigue behavior of Types 304 and 316 stainless steel. The effects of testing in a sodium environment as well as long-term sodium exposure were investigated. The fatigue tests were conducted at 600 and 700°C in sodium of controlled purity, viz., approximately 1 ppM oxygen and 0.4 ppM carbon, at a strain rate of 4 x 10−3s−1. The fatigue life of annealed Type 316 stainless steel is substantially greater in sodium than when tested in air; however, the fatigue life of annealed Type 304 stainless steel is altered much less when tested in sodium. A 1512-h preexposure to sodium had no significant effect on the fatigue life of Type 316 stainless steel tested in sodium. However, a similar exposure substantially increased the fatigue life of Type 304 stainless steel in sodium. 10 fig. (auth).

Book Low Cycle Fatigue Behavior of Types 304 and 316 Stainless Steel at LMFBR Operating Temperature

Download or read book Low Cycle Fatigue Behavior of Types 304 and 316 Stainless Steel at LMFBR Operating Temperature written by CF. Cheng and published by . This book was released on 1973 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully reversed, axial strain-controlled low-cycle fatigue tests with and without tension holdtime have been conducted in air in the temperature range of 806 to 1202 F and at a strain rate of 4 x 10-31 on Types 304 and 316 stainless steel after various initial heat treatments. The test results have been supplemented by metallographic and scanning electron microscopy investigations. Prior heat treatment has a greater effect on specimens tested at 1050 F than on those tested at 1202 F and a greater effect on Type 304 than on Type 316. The introduction of tension holdtimes decreases the cyclic life of both materials and causes the mode of failure to change from transgranular to intergranular. Much of the above fatigue behavior can be qualitatively understood on the basis of the supplemental metallographic results.

Book EFFECTS OF NOTCHES ON LOW CYCLE FATIGUE A Literature Survey

Download or read book EFFECTS OF NOTCHES ON LOW CYCLE FATIGUE A Literature Survey written by B. M. Wundt and published by ASTM International. This book was released on with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Low Cycle Fatigue Behaviour of Laser Powder Bed Fused Stainless Steel 316LN

Download or read book The Low Cycle Fatigue Behaviour of Laser Powder Bed Fused Stainless Steel 316LN written by William Beard and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This note is part of Quality testing.

Book Influence of Nitrogen Solutes and Precipitates on Low Cycle Fatigue of 316L Stainless Steels

Download or read book Influence of Nitrogen Solutes and Precipitates on Low Cycle Fatigue of 316L Stainless Steels written by Degallaix S and published by . This book was released on 1988 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improvement of monotonic and cyclic mechanical properties of 316 steels by nitrogen is studied for different nitrogen contents between 0.03 and 0.25 wt% at 20 and 600°C. At 20°C, yield and ultimate tensile stress increase almost linearly with nitrogen content to the detriment of ductility. Low-cycle fatigue (LCF) life also increases linearly with nitrogen solutes until 0.12 wt% nitrogen where a saturation of this effect occurs. This improvement is attributed to a more homogeneous distribution and to a better reversibility of plastic strain.

Book Effects of Environment on the Low cycle Fatigue Behavior of Type 304 Stainless Steel

Download or read book Effects of Environment on the Low cycle Fatigue Behavior of Type 304 Stainless Steel written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The low-cycle fatigue behavior of Type 304 stainless steel has been investigated at 593/sup 0/C in a dynamic vacuum of better than 1.3 x 10/sup -6/ Pa (10/sup -8/ torr). The results concerning the effects of strain range, strain rate and tensile hold time on fatigue life are presented and compared with results of similar tests performed in air and sodium environments. Under continuous symmetrical cycling, fatigue life is significantly longer in vacuum than in air; in the low strain range regime, the effect of sodium on fatigue life appears to be similar to that of vacuum. Strain rate (or frequency) strongly influences fatigue life in both air and vacuum. In compressive hold-time tests, the effect of environment on life is similar to that in a continuous-cycling test. However, tensile hold times are nearly as damaging in vacuum as in air. Thus, at least for austenitic stainless steels, the influence of the environment of fatigue life appears to depend on the loading waveshape.

Book Assessment of High Temperature Low Cycle Fatigue Life of Austenitic Stainless Steels by Using Intergranular Damage as a Correlating Parameter

Download or read book Assessment of High Temperature Low Cycle Fatigue Life of Austenitic Stainless Steels by Using Intergranular Damage as a Correlating Parameter written by C. Levaillant and published by . This book was released on 1982 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strain-controlled continuous fatigue and creep-fatigue experiments are reported for two types of 316 steel tested at 600°C (1112°F). It is shown that, although the continuous fatigue properties of the two materials are very similar, the one containing a controlled amount of nitrogen exhibits a better creep-fatigue resistance than the other alloy. Detailed measurements of intergranular damage made either on the fracture surfaces or in the bulk of creep-fatigue specimens indicate that the susceptibility of the materials to the effect of tensile hold times can be related to their propensity to intergranular cracking. A stress relaxation-propagation reduction factor per cycle correlation is proposed in order to account for the detrimental effect of tensile hold times on the fatigue life. This correlation relies upon experimental results on austenitic stainless steels published in the literature. It is shown that the proposed approach, derived largely from the quantitative measurement of intergranular damage, holds some promise for predictive purposes.

Book Effect of Temperature and Strain Rate on Low Cycle Fatigue Resistance of AISI 304 316 and 348 Stainless Steels

Download or read book Effect of Temperature and Strain Rate on Low Cycle Fatigue Resistance of AISI 304 316 and 348 Stainless Steels written by JT. Berling and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are reported of strain-controlled, low-cycle fatigue experiments conducted on annealed AISI 304, 316, and 348 stainless steels at temperatures of 430, 650, and 816 C with strain rates of approximately 4 x 10-3, 4 x 10-4, and 4 x 10-5 s-1. The investigation generally shows that fatigue life measured in terms of sustained loading cycles is affected adversely by the increase in temperature and by the decrease in strain rate. The test results were generated with servo-controlled, hydraulic testing machines using inductively heated hourglass-type specimens. Cyclic stress-strain data are compared with monotonic stress-strain data obtained from tension tests performed at the same temperatures and strain rates.

Book High cycle Fatigue Behavior of Type 316 Stainless Steel at 593 C

Download or read book High cycle Fatigue Behavior of Type 316 Stainless Steel at 593 C written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The available low- and high-cycle fatigue data on Type 316 stainless steel at 593 to 600°C have been combined and analyzed to provide a preliminary strain-life correlation. This correlation was then reduced by the appropriate safety factors to a design curve and compared with the ASME T-1420-1B curve. The comparison indicates that significant increases in allowable fatigue cycles should be realized when the present study is concluded.

Book Continuous and Sequential Multiaxial Low Cycle Fatigue Damage in 316 Stainless Steel

Download or read book Continuous and Sequential Multiaxial Low Cycle Fatigue Damage in 316 Stainless Steel written by A. Pineau and published by . This book was released on 1993 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tension and torsion low-cycle fatigue tests were carried out on thin tubular specimens of 316 stainless steel, tested at both room temperature and 600°C. Two types of experiments were performed: (1) conventional continuous isothermal tests, and (2) isothermal sequential tests with different sequences of tension/compression and torsional loading. Most of these tests were carried out under air environment at the equivalent total strain amplitude of ??t/2 = ±0.80% in tension or ??t/2 = ±0.80 ?3% in torsion. Optical and scanning electron microscopy were used to analyze the failure modes, the orientation of microcracks and macrocracks which lead to failure, and crack density.

Book Fatigue and Durability of Metals at High Temperatures

Download or read book Fatigue and Durability of Metals at High Temperatures written by S. S. Manson and published by ASM International. This book was released on 2009 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: From concept to application, this book describes the method of strain-range partitioning for analyzing time-dependent fatigue. Creep (time-dependent) deformation is first introduced for monotonic and cyclic loading. Multiple chapters then discuss strain-range partitioning in details for multi-axial loading conditions and how different loading permutations can lead to different micro-mechanistic effects. Notably, the total-strain method of strain-range partitioning (SRP) is described, which is a methodology that sees use in several industries. Examples from aerospace illustrate applications, and methods for predicting time-dependent metal fatigue are critiqued.

Book Influence of Fretting on Flexural Fatigue of 304 Stainless Steel and Mild Steel

Download or read book Influence of Fretting on Flexural Fatigue of 304 Stainless Steel and Mild Steel written by Robert C. Bill and published by . This book was released on 1978 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue experiments conducted on 304 stainless steel using a flexural-fatigue test arrangement with bolted-on fretting pads have demonstrated that fatigue life is reduced by at least a factor of 10 in the 265- to 334-MPa (38,500- to 48,500-psi) nominal-flexural-fatigue-stress range. In addition, experiments in which the fretting pads were removed after selected numbers of cycles, followed by continued flexural fatigue without fretting show that continued fretting beyond 50,000 cycles does not significantly further reduce fatigue life of 304 stainless steel at 317 MPa (46,000 psi). Microscopic examination of the fretted contact areas revealed fracture initiation sites as well as numerous cracks that did not propagate to failure. Flexural fretting fatigue experiments performed on mild steel showed an insensitivity of fatigue life to the incidence of fretting under flexural stress conditions of from 162 to 217 MPa (23,500 to 31,500 psi).