Imperial College London

ProfessorFionnDunne

Faculty of EngineeringDepartment of Materials

Chair in Micromechanics
 
 
 
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Contact

 

+44 (0)20 7594 2884fionn.dunne

 
 
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Location

 

104Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

141 results found

Chen B, Jiang J, Dunne FPE, 2018, Is stored energy density the primary meso-scale mechanistic driver for fatigue crack nucleation?, International Journal of Plasticity, Vol: 101, Pages: 213-229, ISSN: 0749-6419

© 2017 The Authors Fatigue crack nucleation in a powder metallurgy produced nickel alloy containing a non-metallic inclusion has been investigated through integrated small-scale bend testing, quantitative characterisation (HR-DIC and HR-EBSD) and computational crystal plasticity which replicated the polycrystal morphology, texture and loading. Multiple crack nucleations occurred at the nickel matrix-inclusion interface and both nucleation and growth were found to be crystallographic with highest slip system activation driving crack direction. Local slip accumulation was found to be a necessary condition for crack nucleation, and that in addition, local stress and density of geometrically necessary dislocations are involved. Fatemi-Socie and dissipated energy were also assessed against the experimental data, showing generally good, but not complete agreement. However, the local stored energy density (of a Griffith-Stroh kind) identified all the crack nucleation sites as those giving the highest magnitudes of stored energy.

JOURNAL ARTICLE

Chen B, Jiang J, Dunne FPE, 2018, Is stored energy density the primary meso-scale mechanistic driver for fatigue crack nucleation?, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 101, Pages: 213-229, ISSN: 0749-6419

JOURNAL ARTICLE

Zheng Z, Waheed S, Balint DS, Dunne FPEet al., 2018, Slip transfer across phase boundaries in dual phase titanium alloys and the effect on strain rate sensitivity, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 104, Pages: 23-38, ISSN: 0749-6419

JOURNAL ARTICLE

Ashton PJ, Jun T-S, Zhang Z, Britton TB, Harte AM, Leen SB, Dunne FPEet al., 2017, The effect of the beta phase on the micromechanical response of dual-phase titanium alloys, INTERNATIONAL JOURNAL OF FATIGUE, Vol: 100, Pages: 377-387, ISSN: 0142-1123

JOURNAL ARTICLE

Chen B, Jiang J, Dunne FPE, 2017, Microstructurally-sensitive fatigue crack nucleation in Ni-based single and oligo crystals, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, Vol: 106, Pages: 15-33, ISSN: 0022-5096

JOURNAL ARTICLE

Collins DM, Erinosho T, Dunne FPE, Todd RI, Connolley T, Mostafavi M, Kupfer H, Wilkinson AJet al., 2017, A synchrotron X-ray diffraction study of non-proportional strain-path effects, ACTA MATERIALIA, Vol: 124, Pages: 290-304, ISSN: 1359-6454

JOURNAL ARTICLE

Cuddihy MA, Stapleton A, Williams S, Dunne FPEet al., 2017, On cold dwell facet fatigue in titanium alloy aero-engine components, INTERNATIONAL JOURNAL OF FATIGUE, Vol: 97, Pages: 177-189, ISSN: 0142-1123

JOURNAL ARTICLE

Guan Y, Chen B, Zou J, Ben Britton T, Jiang J, Dunne FPEet al., 2017, Crystal plasticity modelling and HR-DIC measurement of slip activation and strain localization in single and oligo-crystal Ni alloys under fatigue, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 88, Pages: 70-88, ISSN: 0749-6419

JOURNAL ARTICLE

Jiang J, Dunne FPE, Ben Britton T, 2017, Toward Predictive Understanding of Fatigue Crack Nucleation in Ni-Based Superalloys, JOM, Vol: 69, Pages: 863-871, ISSN: 1047-4838

JOURNAL ARTICLE

Zhang Z, Dunne FPE, 2017, Microstructural heterogeneity in rate-dependent plasticity of multiphase titanium alloys, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, Vol: 103, Pages: 199-220, ISSN: 0022-5096

JOURNAL ARTICLE

Zheng Z, Balint DS, Dunne FPE, 2017, Investigation of slip transfer across HCP grain boundaries with application to cold dwell facet fatigue, ACTA MATERIALIA, Vol: 127, Pages: 43-53, ISSN: 1359-6454

JOURNAL ARTICLE

Zheng Z, Balint DS, Dunne FPE, 2017, Mechanistic basis of temperature-dependent dwell fatigue in titanium alloys, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, Vol: 107, Pages: 185-203, ISSN: 0022-5096

JOURNAL ARTICLE

Erinosho TO, Collins DM, Wilkinson AJ, Todd RI, Dunne FPEet al., 2016, Assessment of X-ray diffraction and crystal plasticity lattice strain evolutions under biaxial loading, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 83, Pages: 1-18, ISSN: 0749-6419

JOURNAL ARTICLE

Erinosho TO, Dunne FPE, 2016, Lattice strains at cracks in single crystal titanium: Elastic distortion and GND contributions, INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, Vol: 80, Pages: 237-245, ISSN: 0020-7683

JOURNAL ARTICLE

Jiang J, Yang J, Zhang T, Zou J, Wang Y, Dunne FPE, Britton TBet al., 2016, Microstructurally sensitive crack nucleation around inclusions in powder metallurgy nickel-based superalloys, ACTA MATERIALIA, Vol: 117, Pages: 333-344, ISSN: 1359-6454

JOURNAL ARTICLE

Jiang J, Zhang T, Dunne FPE, Ben Britton Tet al., 2016, Deformation compatibility in a single crystalline Ni superalloy, PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 472, ISSN: 1364-5021

JOURNAL ARTICLE

Jun T-S, Sernicola G, Dunne FPE, Britton TBet al., 2016, Local deformation mechanisms of two-phase Ti alloy, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 649, Pages: 39-47, ISSN: 0921-5093

JOURNAL ARTICLE

Jun T-S, Zhang Z, Sernicola G, Dunne FPE, Britton TBet al., 2016, Local strain rate sensitivity of single alpha phase within a dual-phase Ti alloy, ACTA MATERIALIA, Vol: 107, Pages: 298-309, ISSN: 1359-6454

JOURNAL ARTICLE

Peng Z, Tian G, Jiang J, Li M, Chen Y, Zou J, Dunne FPEet al., 2016, Mechanistic behaviour and modelling of creep in powder metallurgy FGH96 nickel superalloy, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 676, Pages: 441-449, ISSN: 0921-5093

JOURNAL ARTICLE

Wan VVC, Cuddihy MA, Jiang J, MacLachlan DW, Dunne FPEet al., 2016, An HR-EBSD and computational crystal plasticity investigation of microstructural stress distributions and fatigue hotspots in polycrystalline copper, ACTA MATERIALIA, Vol: 115, Pages: 45-57, ISSN: 1359-6454

JOURNAL ARTICLE

Wan VVC, Jiang J, MacLachlan DW, Dunne FPEet al., 2016, Microstructure-sensitive fatigue crack nucleation in a polycrystalline Ni superalloy, INTERNATIONAL JOURNAL OF FATIGUE, Vol: 90, Pages: 181-190, ISSN: 0142-1123

JOURNAL ARTICLE

Wan VVC, MacLachlan DW, Dunne FPE, 2016, Integrated experiment and modelling of microstructurally-sensitive crack growth, INTERNATIONAL JOURNAL OF FATIGUE, Vol: 91, Pages: 110-123, ISSN: 0142-1123

JOURNAL ARTICLE

Zhang T, Jiang J, Britton B, Shollock B, Dunne FPEet al., 2016, Crack nucleation using combined crystal plasticity modelling, high-resolution digital image correlation and high-resolution electron backscatter diffraction in a superalloy containing non-metallic inclusions under fatigue, PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 472, ISSN: 1364-5021

JOURNAL ARTICLE

Zhang Z, Eakins DE, Dunne FPE, 2016, On the formation of adiabatic shear bands in textured HCP polycrystals, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 79, Pages: 196-216, ISSN: 0749-6419

JOURNAL ARTICLE

Zhang Z, Jun T-S, Britton TB, Dunne FPEet al., 2016, Determination of Ti-6242 alpha and beta slip properties using micro-pillar test and computational crystal plasticity, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, Vol: 95, Pages: 393-410, ISSN: 0022-5096

JOURNAL ARTICLE

Zhang Z, Jun T-S, Britton TB, Dunne FPEet al., 2016, Intrinsic anisotropy of strain rate sensitivity in single crystal alpha titanium, ACTA MATERIALIA, Vol: 118, Pages: 317-330, ISSN: 1359-6454

JOURNAL ARTICLE

Zheng Z, Balint DS, Dunne FPE, 2016, Rate sensitivity in discrete dislocation plasticity in hexagonal close-packed crystals, ACTA MATERIALIA, Vol: 107, Pages: 17-26, ISSN: 1359-6454

JOURNAL ARTICLE

Zheng Z, Balint DS, Dunne FPE, 2016, Dwell fatigue in two Ti alloys: An integrated crystal plasticity and discrete dislocation study, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, Vol: 96, Pages: 411-427, ISSN: 0022-5096

JOURNAL ARTICLE

Zheng Z, Balint DS, Dunne FPE, 2016, Discrete dislocation and crystal plasticity analyses of load shedding in polycrystalline titanium alloys, INTERNATIONAL JOURNAL OF PLASTICITY, Vol: 87, Pages: 15-31, ISSN: 0749-6419

JOURNAL ARTICLE

Britton TB, Dunne FPE, Wilkinson AJ, 2015, On the mechanistic basis of deformation at the microscale in hexagonal close-packed metals, PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 471, ISSN: 1364-5021

JOURNAL ARTICLE

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