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Friday, July 17, 2020 | History

3 edition of Elevated temperature crack propogation found in the catalog.

Elevated temperature crack propogation

Thomas W. Orange

Elevated temperature crack propogation

by Thomas W. Orange

  • 115 Want to read
  • 19 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Metals -- Fatigue.,
  • Fracture mechanics.

  • Edition Notes

    StatementThomas W. Orange.
    SeriesNASA technical memorandum -- 106490.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15392128M

      Ulrich Krupp is Senior Engineer at the Institute of Materials Technology of Siegen University, Germany, and responsible for the research files fatigue and high-temperature corrosion of metals and alloys. He completed his Ph.D. in mechanical engineering there, and also obtained his lecturing qualification (habilitation) in Task VII - Isothermal and TMF Crack Propagation, Analog 40 Material Specimen Design 40 Displacement Control and Measurement 47 Test Plan 51 Task VIII - Crack Propagation With Thermal Gradient, 53 Analog Material COMPUTER SIMULATION OF SEN SPECIMENS DISCUSSION REFERENCES iii 54 61

    This paper seeks to evaluate crack propagation properties and residual lives of metallic alloys subjected to fatigue loading at room and high temperatures. Fatigue crack growth tests were. The dynamic fracture behavior of brittle materials that contain micro-level cracks should be examined when material subjected to impact loading. We investigated the effect of micr.

    The increase in crack growth rate at very high nitrate levels is consistent with data obtained in NAOH, and shows that elevated crack growth rates are possible in sufficiently alkaline solutions. In aerated water, the reduction of nitrate occurs only when nitrate migrates into the crack, since in high temperature water the crack is deaerated. Fatigue crack propagation in aqueous environments (Y. Nakai). Application of fatigue crack growth data to low cycle fatigue at high temperature (L. Remy). Creep-fatigue interaction under high-temperature conditions (R. Ohtani, T. Kitamura). Fatigue crack propagation in metals at low temperatures (X.-L. Zheng, B.-T. Lu). (Part contents.


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Elevated temperature crack propogation by Thomas W. Orange Download PDF EPUB FB2

Room and elevated temperature fatigue crack propagation behavior of AM Inconel alloy should be well-understood for the successful application in aerospace and power generation industries. In this study, the fracture mechanics-based FCP behavior of L-PBF Inconel alloy at 25 and °C was examined and compared to that of CM : Sumin Kim, Heesoo Choi, Jehyun Lee, Sangshik Kim.

The temperature achieved is dependent on the flux density of incident Crack propagation testing at high temperatures radiation, the emissivity of the surface and partially on the thermal conductivity of the material. Temperatures up to °C have been achieved depending on the testpiece shape and : A J Bushby, F Guiu, M F R Sammur.

The fatigue crack propagation behavior of three superalloys subjected to a single overloading at elevated temperatures was investigated. The fatigue crack propagation rate FCPR versus stress intensity factor range data da/dN—ΔK were calculated using the two-point secant method.

It was found that the crack growth rates of the investigated materials were retarded after overloading Cited by: 7. The furnace used was an MTS high temperature furnace with three temperature zones (model /MTS with a temperature controller of model ). The crack propagation was monitored by the direct current Potential Drop (PD) technique according to ASTM E using a Matelect DCM-1, 2 channel pulsed DCPD system.

A direct current of 10 A was run Cited by: Fatigue Crack Propagation in Metals and Alloys: Microstructural Aspects and Modelling Concepts. Author(s): About this book. and responsible for the research files fatigue and high-temperature corrosion of metals and alloys.

He completed his Ph.D. in mechanical engineering there, and also obtained his lecturing qualification. Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials. It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material's resistance to fracture.

In modern materials science, fracture mechanics is an important tool used to improve the. Journals & Books; Help Download full Vol Issue 4, DecemberPages Deformation produced by elevated temperature fatigue crack propagation in type stainless steel The extent and nature of the plastic deformation developed by fatigue crack propagation in type stainless steel at °C was investigated using.

High ground temperature plays an important role in stability analysis when dealing with underground projects. To study the influence of ground temperature on the properties of surrounding rock, conventional triaxial compression tests were carried out at different temperatures and confining pressures with acoustic emission (AE) technology for the damage analysis and characteristic stress.

A fracture mechanics and fractographic study was conducted on creep and fatigue crack propagation of a stainless steel under constant and repeated tensile stress at a temperature of °C. Linear elastic fracture mechanics could be applied to the test data fairly successfully in spite of the fact that the tests were conducted under creep.

Try the new Google Books. Check out the new look and enjoy easier access to your favorite features. Try it now. Effect of Elevated Temperatures on the Low Cycle Fatigue.

Fatigue Life and Short Crack Propagation of Turbine Rotor Steels. Some Contributions to the Further Development of Low Cycle. The Improved Neubers Reviews: 1. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

than those at °C. This was attributed to crack tip blunting at the very high temperature of °C. It should be pointed out that the highest precipitation temperature employed in most heat-treatments of Alloy is °C.

Hence, any tests conducted at temperatures in excess of °C will. The fatigue crack growth rates of three solid solution strengthened superalloys were measured at 25°C and from to °C over a range of frequencies varying from to Hz. The three alloys were respectively nickel base, cobalt base and iron base alloys with approximately the same chromium content.

The plots of crack growth ratevs AK, the range of the stress intensity factor, show. Fatigue Crack Propagation Behavior of Type () Weldments at Elevated Temperatures Equations were developed to predict the rate of fatigue crack growth over a range of temperatures BY L. JAMES AND VV.

MILLS ABSTRACT. The fatigue crack propaga­ tion behavior (FCP) of Type () stainless steel weldments in an air envi­. The fatigue crack propagation (FCP) behavior of the nickel-base superalloy CMSX-2 in single-crystal form was investigated.

Tests were conducted for two temperatures (25 and °C), two orientations ([][] and [][]), and in two environments (laboratory air and ultra-high vacuum torr).

Following FCP testing, the fracture surfaces were examined using scanning electron microscopy. Elevated Temperature Crack Propagation Thomas W. Orange National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio v SUMMARY This paper is a summary of two NASA Contracts on high temperature fatigue crack propagation in metals.

The first evaluated the ability of fairly simple nonlinear fracture. Fatigue crack propagation behaviour of a nickel based superalloy at elevated temperatures.

Materials Research Innovations: Vol. 18, IUMRS-ICAMpp. SS The elevated temperature fatigue-crack propagation response of Inconel and Inconel was characterized within a linear-elastic fracture mechanics framework in air and low-oxygen liquid sodium environments.

The crack growth rates of both nickel-base alloys tested in liquid sodium were found to be considerably lower than those obtained in air. The crack-propagation characteristics of a number of heat-resistant alloys and high-strength alloys are studied at room temperature and at elevated temperatures using fatigue-cracked specimens.

These alloys fall into three general groups, viz. refractory metals, super alloys, and some special high. Scientific books collection; Radionuclides sheets; Scientific & technical information; Computer codes; Databases; Experimental facilities and means; Theses and post-docs; Training through research policies; Theses; Post-docs; HDR.

On massive carbide precipitation during high temperature low cycle fatigue in alloy H Effect of compressive hold time on fatigue life and creep-fatigue damage in alloy H at °C Nucleation mechanisms of dynamic recrystallization in austenitic steel alloy H.DOI: /PVP Corpus ID: Fatigue Crack Propagation from Notched Specimens of SS in an Elevated Temperature Aqueous Environment @inproceedings{WireFatigueCP, title={Fatigue Crack Propagation from Notched Specimens of SS in an Elevated Temperature Aqueous Environment}, author={Gary Lee Wire and William J.

Mills}. at this temperature. Fatime-Crack Growth Behavior The variation in fatigue-crack propagation rates with the applied stress-intensity range for the MoSiB alloy is shown in Fig. 4; results are plotted for ambient and elevated (" and OC) temperatures and are compared with previous results on.