Materials Map

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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Naji, M.
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Connolley, T.

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Publications (38/38 displayed)

  • 2024Grain-level effects on in-situ deformation-induced phase transformations in a complex-phase steel using 3DXRD and EBSDcitations
  • 2023Hoop strain measurement during a SiC/SiC ceramic composite tube burst test by digital volume correlation of X-ray computed tomographs8citations
  • 20233-Dimensional analysis of fatigue crack fields and crack growth by in situ synchrotron X-ray tomography13citations
  • 20233D correlative imaging of lithium ion concentration in a vertically oriented electrode microstructure with a density gradient.12citations
  • 2022Hoop Strain Measurement During a SiC/SiC Ceramic Composite Tube Burst Test by Digital Volume Correlation of X-Ray Computed Tomographs8citations
  • 2022Correlative full field X-ray Compton scattering imaging and X-ray computed tomography for in situ observation of Li ion batteries14citations
  • 2022Probing interdendritic flow and hot tearing during solidification using real time X-ray imaging and droplet tracking11citations
  • 2021Synchrotron X-ray imaging of directed energy deposition additive manufacturing of titanium alloy Ti-624262citations
  • 2020In situ measurement of elastic and total strains during ambient and high temperature deformation of a polygranular graphite18citations
  • 2020Unifying the effects of in and out-of-plane constraint on the fracture of ductile materials28citations
  • 2020In-situ X-ray radiography of primary Fe-rich intermetallic compound formation43citations
  • 2020Measurement of strain evolution in overloaded roller bearings using time-of-flight neutron diffraction7citations
  • 2019Transgranular liquation cracking of grains in the semi-solid state76citations
  • 2019Revealing internal flow behaviour in arc welding and additive manufacturing of metals.195citations
  • 2019In situ characterization of work hardening and springback in grade 2 α-titanium under tensile load35citations
  • 2018Mapping of axial plastic zone for roller bearing overloads using neutron transmission imaging11citations
  • 2017In-situ observation of fragmentation of primary crystals by ultrasonic cavitation in watercitations
  • 2017A synchrotron X-radiography study of the fragmentation and refinement of primary intermetallic particles in an Al-35Cu alloy induced by ultrasonic melt processingcitations
  • 2017On the occurrence of a eutectic-type structure in solidification of Al-Zr alloys24citations
  • 2017On the occurrence of a eutectic-type structure in solidification of Al-Zr alloys24citations
  • 2017A synchrotron X-ray diffraction study of non-proportional strain-path effects33citations
  • 2016Polycrystal deformation analysis by high energy synchrotron X-ray diffraction on the I12 JEEP beamline at Diamond Light Source16citations
  • 2016A synchrotron X-ray diffraction study of non-proportional strain-path effects.33citations
  • 2016Polycrystal deformation analysis by high energy synchrotron X-ray diffraction on the 112 JEEP beamline at Diamond Light Source16citations
  • 2016Time-resolved synchrotron tomographic quantification of deformation during indentation of an equiaxed semi-solid granular alloy42citations
  • 2016A synchrotron X-ray diffraction study of non-proportional strain-path effects33citations
  • 2015Transgranular liquation cracking of grains in the semi-solid state76citations
  • 2015A synchrotron X-ray diffraction study of in situ biaxial deformation54citations
  • 2015Time-resolved synchrotron diffractometry of phase transformations in high strength nickel-based superalloys37citations
  • 2014Dark-field hyperspectral X-ray imaging21citations
  • 2014Development of EM-CCD-based X-ray detector for synchrotron applications2citations
  • 2014Influence of Fe-rich intermetallics on solidification defects in Al-Si-Cu alloys144citations
  • 2013Residual stresses in Linear Friction Welding of aluminium alloys62citations
  • 2013A new parameter for modelling three-dimensional damage evolution validated by synchrotron tomography22citations
  • 2012Quantifying damage accumulation during the hot deformation of free-cutting steels using ultra-fast synchrotron tomography8citations
  • 2011In situ X-ray observation of semi-solid deformation and failure in Al-Cu alloys74citations
  • 2000A study of the role of (Nb,Ti)C carbides in fatigue crack initiation in IN718 at 20oC and 600oCcitations
  • 2000Effect of oxidation on high temperature fatigue crack initiation and short crack growth in Inconel 718citations

Places of action

Chart of shared publication
Wright, Jp
1 / 3 shared
Slater, C.
1 / 6 shared
Ball, Jad
1 / 1 shared
Davis, C.
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Michalik, S.
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Said, M.
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Vashishtha, H.
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Steinhilber, F.
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Collins, Dm
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Hébrard, L.
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Zhao, S.
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Saucedo-Mora, L.
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Marrow, Tj
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Chen, Y.
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Vo, Nt
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Réthoré, J.
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Koko, A.
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Fu, Y.
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Wigger, T.
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Barhli, S.
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Singh, S.
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Liu, D.
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Lechambre, J.
1 / 1 shared
Buffiere, J-Y
1 / 1 shared
Collins, S.
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Van Assche, F.
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Boone, Mn
2 / 4 shared
Magdysyuk, Ov
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Suzuki, K.
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Liotti, E.
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Wilson, Md
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Wheater, R-M
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Huang, C.
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Veale, Mc
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Lui, A.
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Leung, Cla
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Marrow, Thomas
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Collins, Sp
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Grant, Ps
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Atwood, Rc
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Clark, Sj
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Todd, I.
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Marussi, S.
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Lee, Pd
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Baxter, Gj
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Jones, Ma
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Sinclair, L.
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Zillhardt, T.
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Earp, P.
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Kabra, S.
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Tonge, Sm
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Sherry, Ah
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Mostafavi, M.
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Reinhard, C.
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Simpson, Ca
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Cinar, Af
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Feng, S.
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Mathiesen, Rh
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Marshall, M.
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Mostafavi, Mahmoud
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Reid, A.
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Moorby, S.
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Martinez, I.
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Karagadde, S.
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Tsivoulas, D.
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Cai, B.
1 / 9 shared
Azeem, Ma
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Fife, Jl
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Puncreobutr, C.
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Kareh, Km
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Dong, H.
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Atkinson, Hv
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Gao, S.
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Kidess, A.
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Atwood, R.
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Kleijn, Cr
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Marsden, J.
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Richardson, Im
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Aucott, L.
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Drakopoulos, M.
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Browne, Dj
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Tong, M.
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Wen, S.
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Mirihanage, W.
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Swygenhoven, H. Van
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Petegem, S. Van
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Sofinowski, K.
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Marshall, M. B.
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Kockelmann, W.
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Minniti, T.
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Eskin, D.
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Mi, J.
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Wang, F.
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Tzanakis, I.
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King, A.
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Koe, B.
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Eskin, D. G.
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Khvan, A. V.
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Xie, M.
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Abbey, B.
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Connor, L.
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Cai, Biao
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Cernik, Robert J.
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Veale, M. C.
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Jacques, Sdm
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Warren, A.
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Holland, A. D.
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Evagora, A. M.
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Lee, P. D.
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Fife, J. L.
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Harding, S.
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Reinhard, Christina
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Korsunsky, Am
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Jun, Ts
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Kaye, M.
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Lin, J.
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Farrugia, D.
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Balint, D. S.
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Balint, D.
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Rockett, P.
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Fuloria, D.
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Chart of publication period
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Co-Authors (by relevance)

  • Wright, Jp
  • Slater, C.
  • Ball, Jad
  • Davis, C.
  • Michalik, S.
  • Said, M.
  • Vashishtha, H.
  • Steinhilber, F.
  • Collins, Dm
  • Hébrard, L.
  • Zhao, S.
  • Saucedo-Mora, L.
  • Marrow, Tj
  • Chen, Y.
  • Vo, Nt
  • Réthoré, J.
  • Koko, A.
  • Fu, Y.
  • Wigger, T.
  • Barhli, S.
  • Singh, S.
  • Liu, D.
  • Lechambre, J.
  • Buffiere, J-Y
  • Collins, S.
  • Van Assche, F.
  • Boone, Mn
  • Magdysyuk, Ov
  • Suzuki, K.
  • Liotti, E.
  • Wilson, Md
  • Wheater, R-M
  • Huang, C.
  • Veale, Mc
  • Lui, A.
  • Leung, Cla
  • Saucedo-Mora, Luis
  • Marrow, Thomas
  • Collins, Sp
  • Alex Leung, Cl
  • Grant, Ps
  • Atwood, Rc
  • Clark, Sj
  • Todd, I.
  • Marussi, S.
  • Lee, Pd
  • Baxter, Gj
  • Jones, Ma
  • Sinclair, L.
  • Zillhardt, T.
  • Earp, P.
  • Kabra, S.
  • Tonge, Sm
  • Sherry, Ah
  • Mostafavi, M.
  • Reinhard, C.
  • Simpson, Ca
  • Cinar, Af
  • Feng, S.
  • Mathiesen, Rh
  • Marshall, M.
  • Mostafavi, Mahmoud
  • Reid, A.
  • Moorby, S.
  • Martinez, I.
  • Karagadde, S.
  • Tsivoulas, D.
  • Cai, B.
  • Azeem, Ma
  • Fife, Jl
  • Puncreobutr, C.
  • Kareh, Km
  • Dong, H.
  • Atkinson, Hv
  • Gao, S.
  • Kidess, A.
  • Atwood, R.
  • Kleijn, Cr
  • Marsden, J.
  • Richardson, Im
  • Aucott, L.
  • Drakopoulos, M.
  • Browne, Dj
  • Tong, M.
  • Wen, S.
  • Mirihanage, W.
  • Swygenhoven, H. Van
  • Petegem, S. Van
  • Šmíd, M.
  • Sofinowski, K.
  • Rahimi, Salah
  • Marshall, M. B.
  • Kockelmann, W.
  • Minniti, T.
  • Eskin, D.
  • Mi, J.
  • Wang, F.
  • Tzanakis, I.
  • King, A.
  • Koe, B.
  • Wang, C.
  • Eskin, D. G.
  • Khvan, A. V.
  • Starodub, K. F.
  • Lim, J. J. H.
  • Burke, M. G.
  • Dunne, F. P. E.
  • Kupfer, H.
  • Todd, R. I.
  • Wilkinson, A. J.
  • Erinosho, T.
  • Korsunsky, A.
  • Xie, M.
  • Abbey, B.
  • Song, X.
  • Connor, L.
  • Hofmann, F.
  • Todd, Ri
  • Dunne, Fpe
  • Wilkinson, Aj
  • Cai, Biao
  • Crudden, D. J.
  • Alabort, E.
  • Reed, R. C.
  • Egan, C. K.
  • Wilson, M. D.
  • Cernik, Robert J.
  • Seller, P.
  • Veale, M. C.
  • Jacques, Sdm
  • Warren, A.
  • Holland, A. D.
  • Evagora, A. M.
  • Tutt, J. H.
  • Soman, Matthew
  • Hall, David
  • Lee, P. D.
  • Kareh, K. M.
  • Fife, J. L.
  • Phillion, A. B.
  • Harding, S.
  • Reinhard, Christina
  • Korsunsky, Am
  • Jun, Ts
  • Kaye, M.
  • Lin, J.
  • Farrugia, D.
  • Balint, D. S.
  • Balint, D.
  • Rockett, P.
  • Fuloria, D.
  • Leung, A. C. L.
  • Hamilton, R. W.
  • Starink, M. J.
  • Reed, Philippa A. S.
OrganizationsLocationPeople

document

A study of the role of (Nb,Ti)C carbides in fatigue crack initiation in IN718 at 20oC and 600oC

  • Starink, M. J.
  • Connolley, T.
  • Reed, Philippa A. S.
Abstract

It is generally accepted that primary carbides can act as fatigue crack initiation sites in nickel-based superalloys. Oxidation of primary carbides is suggested as one cause of fatigue crack initiation at elevated temperatures, though little has been published about the precise mechanism by which this occurs. This paper presents the results of preliminary studies on high temperature fatigue crack initiation in Inconel 718, a material used extensively for components in gas turbines. Comparisons are made between material taken from an extruded bar and a turbine disc forging. <br/>Fatigue tests were performed in air at 600oC on U-notch specimens, designed to simulate the stress concentration factor of a blade root fixing. Fatigue lives using 1-1-1-1 and 1-30-1-1 trapezoidal waveforms are compared. Differences in lifetimes between the extruded bar and disc material are discussed with reference to their different microstructures. Post-fracture analysis using optical and scanning electron microscopy indicates that swelling and eruption of oxidising (Nb,Ti)C carbides is a significant cause of fatigue crack initiation.<br/>To further investigate the role of erupted carbides in crack initiation, some tests were performed at room temperature, using a 10 Hz sinusoidal waveform. Characterisation of surface crack initiation behaviour in plain, polished bend bars is presented, comparing the as-polished condition with specimens thermally exposed for 4 hours at 600oC to induce carbide oxidation.<br/>The results of the high temperature and room temperature studies are discussed, concentrating on possible mechanisms of fatigue crack initiation caused by the oxidation of primary carbides.

Topics
  • impedance spectroscopy
  • microstructure
  • surface
  • nickel
  • scanning electron microscopy
  • crack
  • carbide
  • fatigue
  • forging
  • superalloy
  • concentrating