Results of constant amplitude tests, performed in air and in synthetic condensate K2.2:(a) brazed AISI 304L/BAu-4 specimens of the current study; and (b) brazed AISI 304L/BNi-2 specimens from
Fractographic and Microstructural Analysis of Fatigue Specimens of A302 Grade B Steel Tested in Air at Room Temperature with fatigue crack propagation data of Type A302-B ferritic steel tested (PDF) The effect of nitriding on fatigue strength of specimens from grade 45 steel more than twice (Fig. 6). 42CrMo4 steel tested on fatigue at low (Fig. 8, b) a nd high Fig. 10 Fatigue strength of grade 38 steel in air (a)
Reverse bend, constant deflection fatigue tests were performed in ambient temperature air on notched 1018 steel specimens. Endurance limit for these exhibited scatter in excess of 25 pct, and this was correlated with concentration of manganese sulfide inclusions at the notch root vicinity. For specimens designated as high inclusion the endurance limit was 95 MN/m2 (14 ksi); and for Air fatigue of notched 1018 steel in the endurance limit Reverse bend, constant deflection fatigue tests were performed in ambient temperature air on notched 1018 steel specimens. Endurance limit for these exhibited scatter in excess of 25 pct, and this was correlated with concentration of manganese sulfide inclusions at the notch root vicinity. For specimens designated as high inclusion the endurance limit was 95 MN/m2 (14 ksi); and for
Jan 01, 2020 · As the most common engineering material, steel grades such as maraging steel are considered among others in SLM . 470 Emmanouil Bouzakis et al. / Procedia CIRP 87 (2020) 469â473 Author name / Procedia CIRP 00 (2019) 000â000 3 Fig. 2. Microstructure of the wrought and the SLM specimens in various sections. ELECTE U E - DTICThe specimen geometries used in this investigation were IT C(T) and IT SE(B) specimens. The C(T) specimens were used for the CS-19 aluminum and A710 steel and wer 1 in. thick. SE(B) specimens were used for all other tests. The A302 and A515 steel specimens were 2 in. thick and the HY-100 and A533B steel specimens were 1 in. thick.
Specimens and corrosive environment Fatigue tests were carried out in air and in a corrosive 0.1 M NaCl + 0.044 M Na 2SO 4 aqueous solution. The fatigue tests in air were performed using 8 mm diameter cylindrical specimens with a theoretical stress concentration factor in tension of K t Effects of LWR Coolant Environments on - NRC:Home 65. Relative fatigue lives of different orientations of A302Gr B lowalloy steel in highdissolvedoxygen water and simulated PWR environments.. 56 66. SEM photomicrograph of fracture surface and longitudinal section of A302Gr B steel specimen in T2 orientation tested in PWR water at 288°C, 0.75% strain
A302-Gr B fatigue specimens 5 3. Fatigue life of A302-Gr B low-alloy steel at 288°C in air and simulated PWR water tested with triangular or sawtooth loading wave forms at a strain range of =0.75% 7 4. Total strain range vs. fatigue life data for low-alloy steels in air 7 5. FATIGUE BEHAVIOUR OF STRUCTURAL STEELS. S355 steel grade, representing almost twice the yield strength of the S355 steel grade. While S690 steel is considered a high strength steel, the S355 and S235 steels are considered mild steels. Fatigue tests on smooth specimens were carried out according the ASTM E606 standard (ASTM, 1998), under strain controlled conditions.
Tensile tests of the A36 steel established the average dynamic yield strength at 36.5 ksi and the tensile capacity at 60.2 ksi. Specimens were cut to length and width as illustrated in Fig. 1 from the same 3/8 in. steel plate~ Care was taken to maintain the" longitudinal axis of the specimen along the direction of rolling for the plate. FATIGUE STRENGTH ENHANCEMENT BY MEANS OF The program is done on 18 test specimens made from material conforming to the ASTM specification A588-97 Grade B with a yield stress range of between 53 and 63 ksi. The cover plates and stiffeners are made from high strength low alloy structural steel to ASTM specification A 709-97B Grade 50W having a minimum yield strength of 59 ksi.
example, the ground-air-ground cycle of an aircraft has substantial similarity from flight to flight. COMMON FATIGUE TEST SPECIMENS (a) Rotating bending, (b) Axial uniform, (c) Axial hourglass These specimens are usually used for axial or bending tests. Fatigue Crack Propagation Rates for Notched 304 Stainless Aug 18, 2004 · Fatigue crack propagation (FCP) rates for 304 stainless steel (304 SS) were determined in 24°C and 288°C air and 288°C water with 2060 cc H 2 / kg H 2 O using double-edged notch (DEN) specimens. Tests performed at matched loading conditions in air and water provided a direct comparison of the relative crack growth rates over a wide range of test conditions.
Aug 18, 2004 · Fatigue crack propagation (FCP) rates for 304 stainless steel (304 SS) were determined in 24°C and 288°C air and 288°C water with 2060 cc H 2 / kg H 2 O using double-edged notch (DEN) specimens. Tests performed at matched loading conditions in air and water provided a direct comparison of the relative crack growth rates over a wide range of test conditions. Fatigue Design Curves of Carbon and Low; Alloy SteelsEffect of material orientation on fatigue life of A302-Gr B low-alloy steel in air at 288°C .. ,.. .
Fatigue crack growth rate data for two X70 steels in hydrogen gas pressurized to 5.5 MPa, R = 0.5, loading frequency of 1 Hz, plus tests in air shown from the same two steels. For comparison, data on a 1990 s vintage X52 steel, tested by Sandia National Laboratories at 1 Hz, R = 0.5, at 21 MPa hydrogen gas pressure are shown . Fatigue Strength and Fracture Mechanisms in the Very Feb 03, 2020 · effect of specimen geometries. Test results of smooth and notched specimens, K t ¼1.4, and mean stress effects, R¼0.1 and R¼ 1, are shown in SN diagrams in the life range of 106109 load cycles. 2. Experimental Section 2.1. Materials Three high-strength bar steel grades were investigated in the present study and test specimens were sampled
Feb 03, 2020 · effect of specimen geometries. Test results of smooth and notched specimens, K t ¼1.4, and mean stress effects, R¼0.1 and R¼ 1, are shown in SN diagrams in the life range of 106109 load cycles. 2. Experimental Section 2.1. Materials Three high-strength bar steel grades were investigated in the present study and test specimens were sampled Fatigue Strength and Fracture Mechanisms in the VeryHigh Smooth and notched hourglass specimen geometries were designed to run at resonance in a 20 kHz ultrasound fatigue test machine with a net section diameter of 4.0 mm, a notch depth of 1.0 mm, and a notch radius of 2.0 mm, as shown in Figure 4a,b. The test specimens were all prepared to their geometry, heat treated to final hardness, and the
2 Test specimens The test specimens were produced of 16mm thick steel plates in S700 and S960 material. The specimens were cut in a dog bone shape as shown in figure 2 in order to minimize the stress concentration]. The thermal cutting methods are frequently used in industry; oxygen, plasma and laser. No change was done in cutting process Fatigue crack growth testing of sub-clad defects - COREThe specimens were fatigue cycled at positive load ratios until the defects broke through to the surface. The specimens were then fractured at liquid nitrogen temperatures to reveal the fracture surfaces. Seven different sub-clad flaw specimens were tested in room temperature air and each test provides a record of cycles to defect break-through.
Fatigue crack growth tests were performed on four point bend specimens with crack like defects intentionally placed in A302B low-alloy pressure vessel steel clad with 308/309L weld deposited stainless steel. The defects were placed in the base metal under the cladding by machining a cavity from the side opposite the cladding, electric-discharge machining a very sharp flaw, fatigue pre-cracking Fatigue studies on carbon steel piping materials and Apr 01, 2008 · Specimen testing was conducted to determine the basic cyclic stressstrain curve, low-cycle fatigue (LCF) and fatigue crack growth rate (FCGR) properties. The LCF tests were conducted on standard uniaxial specimens under strain-controlled condition in which strain range () was varied from 0.4 to 3.0 %. In all 40 specimens were tested.
Dec 01, 1991 · Fatigue Testing for Thermex Reinforcing Bars Introduction Conventional grade 60 reinforcing steel that meets the American Association of State Highway and Transportation Officials (AASHTO) M31-89 (ASTM A615-87) specifications is generally manufactured by alloying certain percentages of rare metals, such as manganese and vanadium, with steel ingots to obtain the Fatigue testing of drill pipe (Journal Article) OSTI.GOVTwenty-nine tests in air and 27 tests in a 3.5% NaCl solution were conducted to test the fatigue strength of Grade E 4.5-in.-OD, 16.6-lbm/ft (114-mm-OD, 24.7-kg/m) drillpipe. The effects of stress range, mean stress, corrosion, and upset geometry were tested on the drillpipe body alone and on specimens that included the tool joint, upset, and
Fractographic and microstructural analysis of fatigue specimens of A302 grade B steel tested in air at room temperature. Washington, D.C. :Naval Research Laboratory :Available from U.S. Nuclear Regulatory Commission,  (OCoLC)1085243594:Material Type:Government publication, National government publication:Document Type:Book Grades and Materials for Boiler and Pressure Vessel Steel ASTM A285:Covers carbon steel plates of low- and intermediate-tensile strengths which may be made by killed, semi-killed, capped, or rimmed steel. These plates are intended for fusion-welded pressure vessels. ASTM A299:Manganese-silicon carbon steel plates for use in welded boilers and other pressure vessels. ASTM A515:Carbon-silicon steel plates primarily for intermediate- and higher
2.2.4. Four-Point Beam Fatigue Test. The beam fatigue test according to AASHTO T321-07 was utilized to evaluate fatigue life of asphalt mixtures. The test was performed under 600 strain levels at temperature of 25°C. A repeated sinusoidal load was applied at frequency of 10 Hz without rest periods . Three specimens were tested. Figures 1 and 2 MEASUREMENT OF FATIGUE CRACK GROWTH RATES Fatigue crack growth rate testing on the SA-372 Grade J steels was conducted following procedures in ASTM Standard E647-05. The test specimens were extracted from the steel test rings and designed according to the compact tension (CT) geometry. These specimens had the following dimensions:
Friction stir welded steel pipelines were tested in high pressure hydrogen gas to examine the effects of hydrogen accelerated fatigue crack growth. Fatigue crack growth rate (da/dN) vs. stress-intensity factor range (K) relationships were measured for an X52 friction stir welded pipe tested in 21 MPa hydrogen gas at a frequency of 1 Hz and R Metallographic and fractographic observations of posttest Fractographic and microstructural analysis of fatigue specimens of A302 grade B steel tested in air at room temperature. Progress report
SSs, the fatigue life of roughened specimens is a factor of ª3 lower than it is for the smooth specimens in both air and lowDO water. The fatigue life of roughened specimens of carbon and lowalloy steels in air is lower than that of smooth specimens; but, in highDO water the fatigue life of roughened and smooth specimens is the same. STATISTICAL ANALYSIS OF FATIGUE STRAIN-LIFE DATA different heats of A333-Grade 6, A106-Grade B. A516- Grade 70. and A508Zlass 1 steel, while the low-alloy steels in- clude 14 heats of A533-Grade B and A508-Class 2 and 3 steel. Most of the data have been obtained on cylindrical specimens tested under axial strain-control mode using a triangle or saw-
Abstract Reasons for data scatter from fatigue tests on a high strength 13% Cr steel are discussed and data is presented for corrosion fatigue of this steel in a condensing steam environment. Rotating bend tests were performed at 50 and 3 Hz and tensiontension fatigue tests at 0.016 Hz and R=0.1.Some specimens were periodically inspected to identify sites of fatigue crack initiation. The Effect of Hydrogen Gas on Fatigue Performance of The fatigue performance of a Cr-Mo pressure vessel steel for storage of high pressure hydrogen gas was studied by Wada et al. LCF cylindrical specimens, with a diameter of 6mm and a gauge length of 15mm, were tested in a hydrogen environment at a pressure of 45MPa at R=-1. The surfaces of the specimen were polished using abrasive paper #800.
Fatigue Specimens of A302 Grade B Steel Tested in Air at Room Temperature G. GABETTA AND V. PROVENZANO Thermostructural Materials Branch Material