Intergranular strains in inconel

Intergranular strains in inconel

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Experimental Characterization of Crack Tip Deformation

A series of fracture mechanics tests were conducted at temperatures of 650 C and 704 C in air, using Inconel ® 718. A noncontacting measurement technique, based on computer vision and digital image correlation, was applied to directly measure surface displacements and strains prior

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Microstructure and Properties of Direct-Aged Alloy 625

MICROSTRUCTURE AND PROPERTIES OF DIRECT-AGED ALLOY 625 M. G. Burke, W. J. Mills and R. Bajaj Bettis Atomic Power Laboratory Bechtel Bettis, Inc. West MiMin, PA 15 122 Abstract The properties and microstructure of Alloy 625 are highly sensitive

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Publications LMTM

Competition between intragranular and intergranular deformation mechanisms in ODS ferritic steels during hot deformation at high strain rate ...

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Lattice strains and diffraction elastic constants of cubic

Intergranular strains in Inconel-600 and the impact on interpreting stress fields in bent steam ... Intergranular strains were found to be actively developed at small plastic deformation (< 4.5 ...

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The initiation of intergranular failure in inconel-600

Abstract The nature of slip interaction with the grain boundaries was examined on the polished surface of Inconel-600 pulled in tension at 370 C and at the initial strain rate of 1.65 × 10-6 sec-1.It was shown that the grain boundaries could not always accommodate slip ...

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The Physical Metallurgy of a Silicon-Containing Low Expansion

phase found in INCONEL alloy 718, precipitate at intermediate temperatures (about 700 C to 95OOC). Laves phase, which is used to control grain size, precipitates at the higher temperatures (800 C-1040 C) used during hot work- ing and

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Characterization of microstructures in Inconel 625 using

4/4/2012· Characterization of microstructures in Inconel 625 using X-r___ 1175 Characterization of microstructures in Inconel 625 using X-r___Scripta Materialia 51 (2004) 5963 .actamat ...

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Stress corrosion cracking of Inconel 600 tubing in

5/3/2020· Inconel 600 will undergo stress corrosion cracking (SCC) at grain boundaries when subjected to a high stress and exposed to water without oxygen at high temperature. Very few service failures have occurred but extensive intergranular cracking has also occurred in plants that experienced denting. All ...

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RESIDUAL STRESSES THROUGH MULTIPASS WELDS IN

The anomalous nature of the strains in strongly bent tubing obtained with the (200) reflection is explained naturally in terms of the presence of a combination of type 1, macrostrains and type 2 ...

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Intergranular strains in Inconel-600 and the impact on

Neutron diffraction measurements are reported of the intergranular (type 2) strains developed in situ under an applied stress in Inconel-600. The magnitudes and signs of the intergranular strains are interpreted in terms of a simple Taylor model with qualitative ...

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Micromechanical behaviour of Ni-based superalloys close

12/10/2018· Abstract To investigate the microstructure-dependent relationships in polycrystalline Ni-based superalloys (Haynes 282 and Inconel 718) deformed in the elastoplastic regime, the lattice strain evolution along various macroscopic directions and along various crystallographic directions is monitored via in situ neutron diffraction during uniaxial tensile loading. ...

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Microstructure and temperature dependence of

Microstructure and temperature dependence of intergranular strains on diffractometric macroscopic residual stress analysis Article in Materials Science and Engineering A 618:271279 · November ...

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Intergranular strains in Inconel-600 steam generator

In this paper the intergranular strains measured in tensile test coupons after uniaxial plastic deformation of +5.6% and -6.0% are presented as strain pole-figures for the (1 1 1), (0 0 2), (2 2 0) and (1 1 3) reflections of the FCC structure. The results are compared

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Stress corrosion cracking of alloy 600 using the constant

Inconel 600 will undergo stress corrosion cracking (SCC) at grain boundaries when subjected to a high stress and exposed to water without oxygen at high temperature. Very few service failures have occurred but extensive intergranular cracking has also occurred in ...

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Intergranular Strains in Pre-Strained and Welded Pipes

Neutron diffraction has been used to investigate the weld residual stresses and the intergranular residual strains in butt-welded 316H pipes. Measurements have been made on pipes subjected to varying degrees of plastic pre-straining before welding, in order to ...

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CiteSeerX LOW CYCLE FATIGUE PROPERTIES OF

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Strain controlled, continuous cycling and 2 minute compressive dwell LCF tests were performed on simulated LPMTM wide-gap repair joints in the nickel-base superalloy Inconel 738 at ...

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Stress-corrosion cracking of Inconel alloy 600 in high

Inconel 600 will undergo stress corrosion cracking (SCC) at grain boundaries when subjected to a high stress and exposed to water without oxygen at high temperature. Very few service failures have occurred but extensive intergranular cracking has also occurred in plants that experienced denting.

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HYDROGEN-ASSISTED FAILURE OF ALLOYS X-750 AND

HYDROGEN-ASSISTED FAILURE OF ALLOYS X-750 AND 625 UNDER SLOW STRAIN-RATE CONDITIONS R.S. Daum, A.T. Motta, D.A. Koss, and D.D. Macdonald The Pennsylvania State University University Park, PA 16802 Abstract Slow strain-rate tensile

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Intergranular Strain and Phase Transformation in a Cobalt

1/9/2006· Abstract: A 3D model for intergranular thermal stresses in coarse polycrystalline alumina has been derived using Diffraction Contrast Tomography. Larger tensile thermal strains develop when the (0001) pole of adjacent grains lies closer to the grain boundary

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LOW CYCLE FATIGUE PROPERTIES OF LPMTM

LOW CYCLE FATIGUE PROPERTIES OF LPMTM WIDE-GAP REPAIRS IN INCONEL 738 Keith A. Ellison, Joseph Liburdi and Jan T. Stover+ Liburdi Engineering Limited, Hamilton, ON, Canada, L9.I lE7 Consulting Engineer, Greenville, SC

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Influence of Residual Stresses on Ageing Precipitation

13/5/2018· Wagner JN, Hofmann M, Wimpory R, Krempaszky C, Stockinger M (2014) Microstructure and temperature dependence of intergranular strains on diffractometric macroscopic residual stress analysis. Mater Sci Eng, A 618:271279 CrossRef Google Scholar

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Use of Slow Strain Rate Tensile Testing to Assess The Ability of Several Superalloys to Resist Environmentally-Assisted Intergranular

ATI 718Plus® alloy, Haynes 282 , and Inconel 740 . Slow and fast strain-rate tensile tests were found to be a useful tool to compare propensities for intergranular surface crack initiation and growth. The effects of composition and heat treatment on tensile

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Intergranular strains in Inconel-600 and the impact on

The magnitudes and signs of the intergranular strains are interpreted in terms of a simple Taylor model with qualitative success. The results are applied to the interpretation of the residual stress fields in severely bent and slightly bent Inconel-600 tubing for steam

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INTERGRANULAR CRACKING OF INOR-8 IN THE MSRE.

The U.S. Department of Energy's Office of Scientific and Technical Information 4 7 7 6 8 2 ng by the ion-exchange mothed at a rate of once per year and at a rate of 12 times per year were compared for the Interim Design Reactor fueled with U/sup233/.

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In Situ Study of the Stress Relaxation During Aging of

3/6/2019· Nickel-base superalloys are conventionally aged in order to develop a favorable microstructure as well as to relieve residual stresses. Here neutron diffraction was used to follow the evolution of residual stress during aging in Inconel 718 and Udimet 720LI for the first ...

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Intergranular Strains in Textured Steel Request PDF

Residual stress profiles were mapped using neutron diffraction in two simple prism builds of Inconel 718: ... The generation of intergranular strains in 309H austenitic steel has been measured in ...

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Tensile Deformation and Fracture Behaviors of a Nickel

2/8/2019· Generally, the complex precipitates in Inconel 718 (also known as GH4169) play an important role in mechanical properties, which include a primary strengthening phase γ (Ni 3 Nb) with an ordered body-centered tetragonal (D0 22) structure, an assistant 3 2 3

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Intergranular strains in Inconel-600 steam generator

In this paper the intergranular strains measured in tensile test coupons after uniaxial plastic deformation of +5.6% and 6.0% are presented as strain pole-figures for the (1 1 1), (0 0 2), (2 2 0) and (1 1 3) reflections of the FCC structure. The results are compared

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Microstructure and temperature dependence of

Here we compare the build up of intergranular strain of two different precipitation hardened IN 718 INCONEL 718 samples, with identical chemical composition. Since intergranular strains are also affected by temperature, results from room temperature

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Effects of grain size on intergranular strain evolution in

Neutron diffraction measurements of the residual intergranular strains generated by uniaxial plastic deformations of +5.6 and 6.0% in samples of Inconel-600 are presented as strain pole-figures ...

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The initiation of intergranular failure in inconel-600

1/9/1971· The nature of slip interaction with the grain boundaries was examined on the polished surface of Inconel-600 pulled in tension at 370 C and at the initial strain rate of 1.65 × 106 sec1. It was shown that the grain boundaries could not always accommodate slip ...

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Liquation Cracking during the Welding of Austenitic Stainless

traction stresses from cooling eventually result in tensile strains in the h.a.z., and if liquid films are present at this stage cracking may occur. It may thus be seen that, other things being equal, the lower the melting point of an intergranular film below that of the

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