Mechanisms of high-temperature fatigue failure in alloy 800H

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National Aeronautics and Space Administration , [Washington, D.C
Alloys -- Fatigue., Metals -- Fai
Other titlesMechanisms of high temperature fatigue failure in alloy 800H., Metallurgical and Materials Transactions A. 1996.
StatementK. Bhanu Sankara Rao, H. Schuster, and G.R. Halford.
SeriesNASA-TM -- 112480., NASA technical memorandum -- 112480.
ContributionsSchuster, H., Halford, G. R., United States. National Aeronautics and Space Administration.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL18131743M

The damage mechanisms influencing the axial strain-controlled low-cycle fatigue (LCF) behavior of alloy H at °C have been evaluated under conditions of equal tension/compression ramp rates (fast-fast (F-F): 4 × s-1 and slow-slow (S-S): 4 X s-1) and asymmetrical ramp rates (fast.

Mechanisms of high-temperature fatigue failure in alloy H Article (PDF Available) in Metallurgical and Materials Transactions A 27(4) April with 60 Reads How we measure 'reads'. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation.

@article{osti_, title = {Mechanisms of high-temperature fatigue failure in alloy H}, author = {Rao, K B.S. and Halford, G R and Schuster, H}, abstractNote = {The damage mechanisms influencing the axial strain-controlled low-cycle fatigue (LCF) behavior of alloy H at C have been evaluated under conditions of equal tension/compression ramp rates (fast-fast (F-F): 4 {times} 10{sup.

Get this from a library. Mechanisms of high-temperature fatigue failure in alloy H. [K Bhanu Sankara Rao; H Schuster; Gary R Halford; United States. National Aeronautics and Space Administration.].

Low-cycle fatigue studies of Alloy H more limited in scope than the present one have been reported previously by Jaske et al., Villagrana et al., Ermi et al., and Kaae.

In addition, Soo and Sabatini [6] have studied the high-temperature high-cycle fatigue behavior of Alloy H in air and by: Eventually fatigue at high temperature is, in fact, a time dependent process that is a function of the material, strain (stress) range, cycle type and environment.

Damage Mechanisms of High Temperature Fatigue: Frequently, the fatigue process is discussed in terms ofFile Size: 6MB. The individual and combined effects of cold working (5 and 10 pct) and aging Mechanisms of high-temperature fatigue failure in alloy 800H book and h in the temperature range to °C) on the high-temperature low-cycle fatigue behavior of alloy.

Therefore, the research presented in this paper focuses on the characterization of high temperature tensile and creep–fatigue interaction properties of Alloy H material. In particular, the tensile properties of the tungsten inert gas (TIG) weld of Alloy H (at 21 °C, °C and °C) are studied in comparison with the base material Cited by: 8.

Bothe, K., Kempf, B. and Gerold, V., “Fatigue and creep damage interaction in alloy H at °C”, High temperature alloys for gas turbines and other applicationsProceedings of a conference held in Liège/Belgium, D. Reidel Publishing Company, Dordrecht,pp.

–Cited by: 2. The damage mechanisms influencing the axial strain-controlled low-cycle fatigue (LCF) behavior of alloy H at C have been evaluated under conditions of equal tension/compression ramp rates (fast-fast (F-F): 4 {times} 10{sup {minus}3} s{sup {minus}1} and slow-slow (S-S): 4 {times} 10{sup {minus}5} s{sup {minus}1}) and asymmetrical ramp rates (fast-slow (F-S): 4 {times} 10{sup {minus}3} s.

A review is presented of high-temperature fatigue mechanisms, with emphasis on nickel-base superalloys. It is shown that the slip character of a material (wavy versus planar), the extent of creep in the fatigue cycle, and the degree of oxidation all influence the mode and rate of fatigue crack initiation and propagation.

High temperature crack growth behavior is investigated over a wide range of R-ratios, frequencies, and temperatures in Alloy H. It is found that high R-ratio, low frequency, or high temperature can enhance creep damage and thus induce an intergranular crack growth by: 1.

Synopsis. The present paper reports experimental work directed towards the analysis of the potential of various crack growth correlating parameters to describe low cycle fatigue and creep crack growth in Alloy H Cited by: 1.

High Temperature Torsional Fatigue Tests • Helical fracture plane as final failure surface • Crack initiation, crack growth, and final failure region • % of the total life was associated with the propagation life Detailed image of high cycle torsional fatigue of Inconel specimen.

These high-temperature components generally operate under very severe conditions. Frequently, they are subjected to cyclic loading at elevated temperatures, which can lead to high-temperature, low-cycle fatigue failure.

Description Mechanisms of high-temperature fatigue failure in alloy 800H FB2

Therefore, the problem of high-temperature, low- cycle fatigue is of great importance to the design these high- Superalloys   Low Cycle Fatigue and Creep-Fatigue Behavior of Alloy at High Temperature a more dominant role of environment with increasing temperature and/or hold times evidenced through changes in creep-fatigue crack growth mechanisms and failure life.

Continuous cycle fatigue and creep-fatigue testing of Alloy was conducted at °C and % Cited by: -For alloy H which will operate >C, the material may need to be purchased with a thermal stabilization heat treatment, and with PWHT of welds and cold worked sections.

Welds should be made with matching Alloy H filler material and should be stress relieved. Refer to ASME section VIII code for additional info.

A new piston alloy was developed by combining the chemical compositions of copper and silicon rich aluminum alloys. Copper increases fatigue strength at low and intermediate temperatures of up to °C whereas the increased amount of intermetallics raises fatigue strength at high temperature of °C or by: 7.

Cyclic stress response and fracture behaviors of Alloy base metal (BM) and Alloy weld joints (WJ) are investigated under strain controlled low cycle fatigue (LCF) loading. Axial fully reversed total-strain controlled tests have been conducted at room temperature with total strain ranges of,and %.

At the all testing conditions, weld joint specimens have shown higher Cited by: 7. will always be within the limits of INCOLOY alloy H. Note also that the limits for INCOLOY alloy H may or may not be within the limits of INCOLOY alloy HT. In addition to the controlled carbon content, INCOLOY alloys H and HT receive a high-temperature annealing treatment that produces an average grain size of ASTM 5 or coarser.

Haynes is a nickel based superalloy which has been proposed as a potential rotor alloy for steam turbines operating at high temperature (°C). Other authors have previously looked at creep, oxidation, low cycle fatigue and other properties of Haynes ; however, lacking from the literature are studies on the fatigue crack growth Cited by: 6.

Fatigue and Durability of Metals at High Temperatures (#G) components, of which one of the major failure mechanisms is fatigue.

This book is Fatigue and Durability of Metals at High Temperatures (#G) viii Preface to the First Volume. For the shorting of fracture mechanism from the point of high temperature condition, so a new method of illustration, which is carried out under the condition of high temperature, for fracture mechanism will be adopted in this paper.

And a more accuracy and more understandability result can be got by this new method. Besides, the performance of TiAl alloys can be improved by making grains Cited by: 2. Fatigue & Durability of Metals at High Temperatures S. Manson, was actively involved in research and development of advanced life prediction methods for low- and high-temperature fatigue analysis of high-performance mechanical systems.

Download Mechanisms of high-temperature fatigue failure in alloy 800H PDF

Most notable is the Total Strain Version of the method of Strain-Range Partitioning (SRP).Format: Hardcover. GH is a new type of superalloy,it is the first study about it. This paper studied the high temperature mechanical properties of the GH base metal and argon-arc welding joints by high temperature tensile test,high temperature creep test and SEM analyses.

The results showed thatthe ultimate tensile strength of GH argon-arc welding joints is about % of that of base metal under the Author: Dong Xu Zhang, Da Shun Liu, Xi Ping Zhu. 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. Guocai Chai et al. / Procedia Engineering 55 () – Fig 2 (a). Formation of nano twins in Alloy ; (b). Typical serration stress-strain curves for Alloy at °C.

Details Mechanisms of high-temperature fatigue failure in alloy 800H PDF

Fig 3 (a) S-N relations of Alloy at RT and °C, (b) Fatigue crack initiation at grain boundary in the VHCF regime, MPa for x In order to investigate the possible mechanisms for subsurface. Purchase Strength of Metals and Alloys (ICSMA 7) - 1st Edition.

Print Book & E-Book. ISBNDesign of Ferritic High Temperature Alloys Mechanisms of Creep in Oxide Dispersion Strengthened Alloys Fatigue and Creep Behavior of Alloy H Book Edition: 1. Propagation of Short Cracks in Alloy HT and in the Steel 22CrMoV12 - 1 at High Temperature under Biaxial Fatigue / Zhiping Mu and Horst Vehoff Flow Behaviour and Microstructure of the Heat-Resistant Steels X20CrMoV and X5NiCrTiAl (Alloy ) / Peter Klimanek, Klaus Cyrener and Christophe Germain / [et al.].

Papers from the Second International Conference on Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials, held at Arabella Conference Centre, Munich, Germany, Sept.organized by Deutscher Verband für Materialprüfung, sponsored by the American Society for Metals and others.CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract produce a composite, which is typically accomplished by incorporating continuous fibers, whiskers, platelets, or second The high-temperature mechanical properties of an in situ phase particles (3).

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