Written in EnglishRead online
|Statement||D.J. Michel and H.H. Smith.|
|Series||NRL memorandum report -- 3936.|
|Contributions||Smith, H. H., Naval Research Laboratory (U.S.). Thermostructural Materials Branch.|
|The Physical Object|
|Pagination||iii, 12 p. :|
|Number of Pages||12|
Download Effect of neutron irradiation on fatigue crack propagation in Type 316 stainless steel at 649C̊
Get this from a library. Effect of neutron irradiation on fatigue crack propagation in Type stainless steel at C̊. [D J Michel; H H Smith; Naval Research Laboratory (U.S.). Thermostructural Materials Branch.].
The fast cycling fatigue crack propagation characteristics of type steel and weld metal have been investigated at °C after irradiation to − × 10 20 n/cm 2 (E > 1 MeV) and × 10 21 n/cm 2 (E > 1 MeV)at the same temperature. With mill-annealed type steel, modest decreases in the rates of crack propagation were observed for both dose levels considered, Cited by: 3.
Journal of Nuclear Materials () North-Holland Publishing Company CRACK PROPAGATION CHARACTERISTICS IN NEUTRON IRRADIATED TYPE STAINLESS STEEL MICROSPECIMENS R.D. GERKE and W.A. JESSER Department of Materials Science, Thornlon Halt, University of Virginia, Charlottescille, VA l, USA In order to better relate the Cited by: 3.
Specimens of Types and and Sandvik 12R72 stainless steels were irradiated in Experimental Breeder Reactor-II (EBR-II) to a fluence of × 10 22 neutrons (n)/cm 2 (E > MeV) at and °C.
Three different specimen configurations were used: small sheet tension specimens, small right circular cylinders for immersion-density measurements, and thin foils.
Abstract. It has been revealed that the neutron irradiation of ultrafine-grained (UFG) 08Kh18N10T steel after severe plastic deformation (SPD) does not lead to the appearance of defects of radiation origin up to a fluence of 2 × 10 20 n/cm 2 (~ dpa) and that the strength properties of the material are retained after irradiation.
At the same time, this irradiation Cited by: 4. Fatigue crack growth rates in an irradiated stainless steel were obtained at a load cycling frequency of Hz with hold times of 1, 10, and 50 s and at 60 Hz at test temperatures ranging from to K.
Specimens were prepared from wrapper tube material, which was irradiated to a fluence level of 4 × 10 26 n/m 2 (E ⩾ MeV) at K in a fast breeder reactor (JOYO).Author: S Jitsukawa, A Umino, I Takahashi, S Iida, M Adachi, K Suzuki, A Hishinuma.
A systematic review has been established by Murakami et al.  regarding the H effect on the fatigue crack propagation in steels. Hydrogen-assisted fatigue crack growth in ferritic steels. The high-cycle fatigue behavior of type low-carbon, nitrogen-added (LN) stainless steel (SS), the prime-candidate target-container material for the spallation neutron source (SNS), was.
The neutron irradiation effects on the fracture toughness of the austenitic chromium-nickel 18CrNi-Ti steel and the weld metal irradiated in a BOR reactor are studied.
The fracture toughness of the steel is found as a function of the orientation of a fracture surface with respect to the rolling by: 2. Effect of neutron radiation exposure was investigated in various ferritic steels with the main emphasis being the effects of thermal neutrons on radiation hardening.
Pure iron of varied grain sizes was also used for characterizing the grain size effects on the source hardening before and after neutron irradiation. While many steels are considered in the overall study, the Cited by: 4. Effects of temperature and frequency on fatigue crack growth in 18% Cr ferritic stainless steel Kamel Makhlouf and J.W.
Jones The fatigue crack growth behaviour of a ferritic stainless steel has been investigated as a function of test temperature, thermal exposure and frequency at intermediate growth rates.
Fatigue crack propagation, metastable austenitic stainless steel, crack closure INTRODUCTION AISI LN stainless steel is one of the materials that fulfill the exigencies of the automotive sector for the development of components that can be used to lead to weight reductions .
Christine Sarazin-Baudoux et al. / Procedia Engineering () – (a) (b) Fig (a) Fatigue crack propagation in high vacuum da/dN vs 'K and 'K eff; (b) comparison of intrinsic fatigue crack propagation in high vacuum for the studied steel and three high strength steels .
In Fig. 1b are plotted the effective crac propagation data in a da/dN vs k 'K. The fatigue crack propagation behavior of type A steel will be examined as a function of specimen thickness, mean stress at both low and high crack growth rates, specimen orientation with respect to the rolling direction, and in the presence of weldments.
In the latter case, fatigue crack propagation studies will be performedAuthor: R. Hertzberg, H. Nordberg. Martensitic high carbon high strength SAE bearing steel is one of the main alloys used for rolling contact applications when high wear and fatigue resistance are required.
Refining the microstructure of steel improves its mechanical properties (e.g. toughness). In this work SAE specimens were exposed to repeated induction heating process and rotation bending Cited by: Irradiation-assisted stress corrosion cracking (IASCC) is a significant materials issue for the light water reactor (LWR) industry and may also pose a problem for fusion power reactors that will use water as coolant.
A new metallurgical process is proposed that involves the radiation-induced release into solution of minor impurity elements not usually thought to participate in IASCC. Cited by: 5. This research has involved studies of fatigue crack initiation as well as fatigue crack propagation.
Principal findings have been that subsurface fatigue cracks can be initiated in forgings of this titanium alloy when the alpha-phase size is of the order of 10 micron, a size which can be present in large forgings.
stainless steel up to necking point. A very good agreement is found between newly calibrated tensile curves and the measurements. 1 INTRODUCTION Severe irradiation conditions in nuclear reactors may limit the operational life of internal struc-tural components supporting the reactor core.
Neutron irradiation of austenitic stainless steels that. Crack propagation experiments under constant stress intensity conditions were performed on SEN specimen of a high-alloyed steel. The experiments were accompanied by thermo elastic stimulated lock-in thermography investigations.
The experiments showed that the crack propagation rate decreases with increasing crack length. Concurrent an increase in the Cited by: 4. DETECTION OF FATIGUE CRACK PROPAGATION IN STEEL USING MAGNETIC MEASUREMENTS Y. Bi and D. Jiles Center for Nondestructive Evaluation Iowa State University Ames, IA 11 INTRODUCTION For structural components which are exposed to cyclic stresses, fatigue damage could lead to a catastrophic failure.
The effects of stress ratio and frequency on the fatigue crack propagation of glass phenolic composite have been dis cussed in the present investigation. The fatigue crack growth rates at three stress ratios ofand have been studied with the first set of specimens whereas the effect of frequency has been studied with the second.
EFFECT OF BORON CONCENTRATION ON FATIGUE CRACK PROPAGATION RESISTANCE AND LOW CYCLE FATIGUE PROPERTIES OF INCONEL L. Xiao1, D.L. Chen2 and M.C. Chaturvedi1 1Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
for fatigue design of cold-formed steel sections. tion of the axial fatigue behaviour of cold-formed steel members. However, a large body on the type of steel material, low temperatures can be beneficial or detrimental or have a little influence on the total fatigue life of a component.
: Dimos Polyzois, Glenn Morris, S. K Hassan. Full length article Strain accumulation during microstructurally small fatigue crack propagation in bcc Fe-Cr ferritic stainless steel E.
Malitckii*, H. Remes, P. Lehto, Y. Yagodzinskyy, S. Bossuyt, H. H€anninen Aalto University School of Engineering, Department of Cited by: EFFECT OF INTERSTITIAL CONTENT ON HIGH TEMPERATURE FATIGUE CRACK PROPAGATION AND LOW CYCLE FATIGUE OF ALLOY Shahid Bashir and Malcolm C.
Thomas Materials and Process Engineering Allison Gas Turbine Division, General Motors Corporation Indianapolis, Indiana Abstract.
Rotating bending fatigue tests of Ti added extra low carbon steel with no strain ageing were carried out. The results obtained are as follows; 1) At the stress of the fatigue limit, fatigue cracks did not propagate when N (number of repetitions) reaches 10 was confirmed to the extent of N=8×10 7 in this experiment.
That the strain ageing plays an important role in fatigue is well. steel  and to corrosion fatigue , with some of them focused on th e role of the microstructure with respect to the degree of cold drawing on the fatigue life.
But few papers are dedicated to fatigue crack propagation and fatigue threshold , most studies being conducted on wires having a di ameter of about 5 to 10 mm . Abstract The effects of fast reactor irradiation at temperatures of ~ ° C and ~ ° C on the fracture toughness and associated strength changes, induced in solution treated Type stainless steel have been characterised using instrumented impact test procedures.
Fig. This type of the specimen is referred to as the epoxy-bonded copper film. Moreover, the reference specim en of base itself was also prepared for the purpose of com paring with epoxy-bonded copper film in electric resistance change du ring fatigue crack propagation.
Fatigue testing. Fatigue testing was performed using a servo-hydraulic. Hardening behavior induced by neutron irradiation at various temperatures ( to K) is characterized in terms of the variations in athermal stress and activation energy for plasticity controlled by precipitation or solid solution, and kink-pair formation with the content and type of impurities.
In P-doped alloys, neutron irradiation below. Fatigue-crack growth tests were conducted at temperatures of 75 F (24 C), F ( C), F ( C) and F ( C); the results for base metal specimens are shown in Figs.and for weldment specimens in Figs.
The results for specimens (material 'a'Heavy Section Steel Technology Program Plate No. In fact, fatigue damage evolution process consists of two parts: fatigue crack initiation and propagation.
Even in a plain specimen of annealed carbon steel, approximately 70% of fatigue life is occupied by the fatigue crack propagation life.
1) Furthermore, the fatigue crack propagation is classified into small and long crack regimes Cited by: 8. All tensile and welded fatigue specimens were stress relief annealed. The tensile specimens were tested on an Instron machine at a cross- head speed of and inch/minute, at.
room temperature. Fatigue Crack Propagation Testing Fatigue crack propagation tests were performed on double cantilever beam (DCB) specimens as shown in Figure 2.
sile strength: MPa), and an austenitic stainless steel (Type% proof strength: MPa, Tensile strength: MPa). Before fatigue tests, surface of the specimens were elec-tro-chemically polished. As shown in Fig. 4, the specimen has a minimum cross-section of width 8 mm, and a thickness of 3 by: 1.
The swelling of stainless steel structural components and fuel rod cladding, resulting from fast neutron irradiation at the temperatures existing in fast reactors, is a matter of great concern in fast reactors.
The swelling can cause changes in the dimensions of the coolant channels and also interfere with the free movement of control elements. fatigue-crack growth and fracture toughness behavior, representing the conditions governing the subcritical and critical propagation of cracks in these structures.
In the present study, bulk plates of aZrTiCuNi10Be alloy, machined into. Experimental Investigation on the Effect of Annealing on Fatigue Life of SAE and C Steels M.
Sreeteja*, However the extent of improvement in fatigue life was more in C steel when compared to SAE Keywords: Fatigue, The cyclic plastic strain is responsible for crack propagation and fracture.
Experiments have been. The propagation behaviour of microstructurally short cracks in the duplex stainless steel has been examined. The different barrier effects of grain and phase boundaries were quantified by means of a Hall-Petch analysis, using results from fatigue experiments and measurements of the crystallographic orientation.
Under certain environmental and loading conditions, fatigue lives of austenitic stainless steels (SSs) can be a factor of 20 lower in water than in air. This report presents experimental data on the effect of heat treatment on fatigue crack initiation in austenitic Type SS in LWR coolant environments.
In this study, crack propagation tests under cyclic fatigue, hold time fatigue, and sustained loading condi-tions were performed on INCONEL and HAYNES to explore the crack propagation behavior using compact-tension (CT) specimens in air at K, K, and K ( C, C, and C) under a constant K-controlled mode.
The recent development of metallic alloy systems which can be processed with an amorphous structure over large dimensions, specifically to form metallic glasses at low cooling rates (∼10 K/s), has permitted novel measurements of important mechanical properties.
These include, for example, fatigue-crack growth and fracture toughness behavior, representing the conditions Cited by: based superalloy Inconel The fatigue crack propagation behaviour under high temperature hold times has been studied.
Firstly, the main fatigue crack propaga-tion phenomena have been investigated with the aim of setting up a basis for fatigue crack propagation modelling. Secondly, modelling of the observed behaviour has been performed.Abstract. Catastrophic failures of drill pipes have to be prevented from occurring during drilling operations of oil and natural gas wells.
We are investigating mechanisms of crack propagation in ultra-high strength low alloy (UHSLA) martensitic steel drill pipe under cyclic stress as functions of pH, H 2 S concentration and temperature in simulated production : M.
Ziomek-Moroz, J. A. Hawk, R. Thodla, F. Gui.