Effects of lattice orientation and crack tip constraint on ductile fracture initiation in Mg single crystals

Prasad, N. Subrahmanya; Narasimhan, R.; Suwas, Satyam

doi:10.1016/j.ijplas.2017.06.004

Cited by 20 publications

(3 citation statements)

References 47 publications

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“…This study presents one of the very few investigations of the void growth in an HCP single crystal of titanium alloy at higher stress triaxialities in a 3D RVE containing spherical void, using CPFEM framework, in an HCP single crystal of titanium alloy at higher stress triaxialities. However, iIt must be emphasized that there have been previous void growth studies using crystal plasticity on magnesium alloys which also has HCP crystal structure, but their application is limited by the fact that they have been carried out in 2D which loses complex effects of crystal orientation, void shape and orientation (Prasad et al, 2017(Prasad et al, , 2016Thakare et al, 2009). Also, the plastic slip in HCP crystal structure has very limited symmetry and out of plane behaviour can prove to be crucial to make right estimation.…”

Section: Introductionmentioning

confidence: 99%

A CPFEM based study to understand the void growth in high strength dual-phase titanium alloy (Ti-10V-2Fe-3Al)

Asim

Siddiq

Kartal

2019

International Journal of Plasticity

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Section: Introductionmentioning

confidence: 99%

A CPFEM based study to understand the void growth in high strength dual-phase titanium alloy (Ti-10V-2Fe-3Al)

Asim

Siddiq

Kartal

2019

International Journal of Plasticity

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“…Hama et al [74] incorporated twinning into the CPFE framework to model the anisotropy of Mg alloy sheets subjected to a two-step loading. Prasad et al [75] simulated the ductile fracture in pure Mg by adding the twinning to plane strain CPFE. [41]).…”

Section: Introductionmentioning

confidence: 99%

Crystal Plasticity Simulation of Magnesium and Its Alloys: A Review of Recent Advances

2021

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Slip and extension twinning are the dominant deformation mechanisms in Magnesium (Mg) and its alloys. Crystal plasticity is a powerful tool to study these deformation mechanisms. Different schemes have incorporated crystal plasticity models to capture different properties, which vary from the simple homogenization Taylor model to the full-scale crystal plasticity finite element model. In the current study, a review of works available in the literature that addresses different properties of Mg and its alloys using crystal plasticity modes is presented. In addition to slip and twinning, detwinning is another deformation mechanism that is activated in Mg and its alloys. The different models that capture detwinning will also be addressed here. Finally, the recent experimental frameworks, such as in-situ neutron diffraction, 3D high energy synchrotron X-ray techniques, and digital image correlation under scanning electron microscopy (SEM-DIC), which are incorporated along crystal plasticity models to investigate the properties of Mg and its alloys, are addressed. Future research directions towards improving the deformation response of Mg and its alloys are identified, which can lead to increased deployment of the lightest structural metal in engineering applications.

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“…Thus far, the research on the surface sliding phenomenon of nickel-based single crystals under multi-axial stress has been mainly focused on the notched and CT specimens. Relevant experiments on CT specimens were performed by Floriot [11], [12], and the plastic strain field at the crack tip was analyzed combining the crystal plasticity theory and numerical simulation [13]- [16]. Previous researchers analyzed the slip band in the deformation process using the three-dimensional elastic anisotropy theory combined with experiments, revealing the plastic evolution law of the double-notched nickel-based single crystal under different random orientations [17]- [21].…”

Section: Introductionmentioning

confidence: 99%

Surface Slip Deformation Characteristics of Nickel-Base Single Crystal Thin Plates With Film Cooling Holes

Zhang

et al. 2020

IEEE Access

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In this study, tensile tests at room temperature and observations of slip bands on the free surface of a nickel-based single-crystal thin plate with densely distributed film cooling holes were performed. The deformation of the slip system at the edge of the cooling hole and between the holes was analyzed. Numerical simulation predictions were conducted based on the plasticity theory of crystals, and the comparison with the experimental results showed good consistency. Based on the simulation and experimental results, the nucleation and propagation direction of the edge cracks were analyzed by means of crystallography. The results showed that the fracture surface was mainly attributed to slipping, and the slip traces were approximately in two directions, namely [011] and [01-1], both of which were 45 • to the stress axis. The maximum values of the resolved shear stress around the cooling hole were attained at 82.5 • , 112.5 • , 247.5 • , and 277.5 • , which corresponded to τ 2 , τ 8 , τ 10 , and τ 6 . INDEX TERMSNi-based single crystal, film cooling holes, crystal plasticity, slip deformation, micro crack initiation.

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Effects of lattice orientation and crack tip constraint on ductile fracture initiation in Mg single crystals

Cited by 20 publications

References 47 publications

A CPFEM based study to understand the void growth in high strength dual-phase titanium alloy (Ti-10V-2Fe-3Al)

A CPFEM based study to understand the void growth in high strength dual-phase titanium alloy (Ti-10V-2Fe-3Al)

Crystal Plasticity Simulation of Magnesium and Its Alloys: A Review of Recent Advances

Surface Slip Deformation Characteristics of Nickel-Base Single Crystal Thin Plates With Film Cooling Holes

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