Correlation of Tensile Properties and Fracture Toughness with Microstructural Features for Al–Li 8090 Alloy Processed by Cryorolling and Post-rolled Annealing

Gairola, Saurabh; Joshi, Amit; Gangil, Brijesh; Rawat, Pankaj; Verma, Raviraj

doi:10.1007/s12666-019-01641-z

Cited by 17 publications

(7 citation statements)

References 35 publications

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“…This leads to higher dislocation density in the cryorolled samples. High dislocation density along with the ultrafine grain formed in the rolling are responsible for the increase in strength and fracture toughness in cryorolled samples [5].…”

Section: Processingmentioning

confidence: 99%

“…These roll bonded sheets were then cut into half, and this cycle is repeated with any lubricant for up to seven cycles [29]. Both CR and ARB do not require any sophisticated dies or machine and can be performed on a conventional rolling mill [5].…”

Section: Processingmentioning

confidence: 99%

“…A three-point bend test specimen was modelled as per ASTM E1820−09e1 with a predefined crack length of 1.5 mm [5]. The specifications of the three-point bend test specimen are shown in Figure 3.…”

Section: Three-point Bend Test Simulationmentioning

confidence: 99%

“…When the stress intensity factor attains a critical value, the crack starts propagating. The critical SIF for three-point bend test specimen is calculated according to ASTM standard E399 by [5]:…”

Section: Three-point Bend Testmentioning

confidence: 99%

“…[4]. Severe plastic deformation (SPD) consists of a group of metal forming processes such as cryorolling (CR) [5][6][7], accumulative roll bonding (ARB) [8], swagging [9] used to produce ultrafine-grained (UFG) materials from the bulk materials. Grain size is a primary microstructural feature that affects the mechanical behavior of materials.…”

Section: Introductionmentioning

confidence: 99%

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XFEM Simulation of Tensile and Fracture Behavior of Ultrafine-Grained Al 6061 Alloy

Gairola

Jayaganthan

2021

Metals

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In the present work, the tensile and fracture behavior of ultra-fine grained (UFG) Al 6061 alloy was simulated using extended finite element method (XFEM). UFG Al 6061 alloy processed by cryorolling (CR) and accumulative roll bonding (ARB) was investigated in this work. Numerical simulations of two-dimensional and three-dimensional models were performed in “Abaqus 6.14” software using an elastic-plastic approach, and the results obtained were validated with the experimental results. The specimens corresponding to the three-point bend test, compact tension test with center crack, and double edge cracks were analyzed using XFEM (eXtended Finite Element Method) approach. In XFEM, the partition of unity (PU) was used to model a crack in the standard finite element mesh. The tensile and fracture properties obtained from the simulation were in tandem with the experimental data. UFG Al alloy showed higher tensile strength and fracture toughness compared to their bulk solution treated counterparts. Fracture toughness was measured in terms of stress intensity factor and J integral. In CR Al alloys, with increasing thickness reduction, an increase in stress intensity factor and a decrease in the J integral was observed. This behavior is attributed to the increase in strength and decrease in ductility of CR samples with increasing thickness reduction. In ARB Al alloys, the strength and ductility have increased with an increase in number of cycles. It also revealed an increase in both the stress intensity factor and J integral in ARB processed Al alloys with increase in number of cycles, as evident from XFEM simulation results.

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Section: Processingmentioning

confidence: 99%

Section: Processingmentioning

confidence: 99%

Section: Three-point Bend Test Simulationmentioning

confidence: 99%

Section: Three-point Bend Testmentioning

confidence: 99%