Strain softening, grain boundary migration and dynamic recrystallization of Ni during high temperature low cycle fatigue
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Cited by (17)
Influence of a mobile incoherent interface on the strain-gradient plasticity of a thin slab
2017, International Journal of Solids and StructuresCitation Excerpt :On the other hand, increase in the average strain-rate raises the maximum stress attained by the slab, thereby delaying the softening response. These findings are in confirmation with the available experimental observations (Morris et al., 2007; Chen and Gottstein, 1988; Legros et al., 2008). The earliest formulation to include strain gradients within a plasticity theory was proposed by Aifantis (1984; 1987) in an attempt to develop a microstructurally informed macroscopic theory of plastic flow.
A mechanism of grain growth-assisted intergranular fatigue fracture in electrodeposited nanocrystalline nickel-phosphorus alloy
2015, Acta MaterialiaCitation Excerpt :The traces of random boundaries were aligned at the angle inclined to slightly smaller than 45° to the stress axis, actually observed as shown in Fig. 1(B) set. The “diamond-shaped grain configuration” has been often observed on high temperature fatigue in ordinary polycrystalline materials [57–60]. In the case of nanocrystalline Ni–P alloy, the dynamic grain growth occurred during cyclic fatigue deformation even at room temperature, resulting in the changes in grain boundary microstructure and the evolution of the diamond-shaped grain structure, accompanying with the transformation of low-angle boundaries into high angle random boundaries, and their final positioning along shear bands.
Influence of overloads on dwell time fatigue crack growth in Inconel 718
2014, Materials Science and Engineering: ACitation Excerpt :Similar observations have been reported to occur during thermomechanical fatigue crack growth tests [9]. Other crack growth mechanisms, such as dynamic recrystallization, strain localization in persistent slip bands, deformation bands, and vacancy diffusion, have also been proposed in references [10–14]. The purpose of this study is to examine the effects of dwell times and overloads on the crack growth mechanisms in Inconel 718.
Motion of [1 0 0]-tilt grain boundaries under cyclic stresses
2007, Materials Science and Engineering: ANeural network approach to elevated temperature creep-fatigue life prediction
1999, International Journal of Fatigue