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Experimental and Computational Approach to Fatigue Behavior of Polycrystalline Tantalum. METALS 2021. [DOI: 10.3390/met11030416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This work provides an experimental and computational analysis of low cycle fatigue of a tantalum polycrystalline aggregate. The experimental results include strain field and lattice rotation field measurements at the free surface of a tension–compression test sample after 100, 1000, 2000, and 3000 cycles at ±0.2% overall strain. They reveal the development of strong heterogeneites of strain, plastic slip activity, and surface roughness during cycling. Intergranular and transgranular cracks are observed after 5000 cycles. The Crystal Plasticity Finite Element simulation recording more than 1000 cycles confirms the large strain dispersion at the free surface and shows evidence of strong local ratcheting phenomena occurring in particular at some grain boundaries. The amount of ratcheting plastic strain at each cycle is used as the main ingredient of a new local fatigue crack initiation criterion.
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Bataille A, Magnin T. Surface damage accumulation in low-cycle fatigue: Physical analysis and numerical modelling. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0956-7151(94)90447-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Brechet Y, Louchet F, Marchionni C, Verger-Gaugry JL. Experimental (TEM and STEM) investigation and theoretical approach to the fatigue-induced dissolution of δ′ precipitates in a 2.5 wt% Al-Li alloy. ACTA ACUST UNITED AC 1987. [DOI: 10.1080/01418618708214391] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Magnin T, Rieux P. The relation between corrosion fatigue and stress corrosion cracking in AlZnMG alloys. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/0036-9748(87)90124-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mobilite des dislocations lors de la sollicitation cyclique de l'aluminium polycristallin. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0001-6160(86)90161-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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