Evaluation of the microstructure and mechanical properties of the ultrafine grained thin-walled tubes processed by severe plastic deformation

Abdolvand, H.; Faraji, Ghader; Givi, Mohammad Kazem Besharati; Hashemi, Ramin; Riazat, M.

doi:10.1007/s12540-015-5261-5

Cited by 21 publications

(13 citation statements)

References 28 publications

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“…It means that the formability of the tubes under the hydro-bulge test is more than tensile-tested tubes. It is in agreement with the previous investigation on brass UFG tubes by the present authors [42].…”

Section: Mechanical Propertiessupporting

confidence: 94%

Microstructure and mechanical properties of fine-grained thin-walled AZ91 tubes processed by a novel combined SPD process

et al. 2017

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A combination of parallel tubular channel angular pressing (PTCAP) and tube backward extrusion (TBE) as a novel combined severe plastic deformation (SPD) was applied on AZ91 alloy to produce ultrafine-grained (UFG) thinwalled tubes. The effects of combined SPD process were investigated on the microstructure refinement and mechanical properties. Also, hydro-bulge test was carried out to reveal the mechanical properties. The results showed a notable increase in ultimate strength, yield strength and microhardness of the thin-walled UFG tube were achieved compared to that from PTCAP process. A remarkable grain refinement achieved. Applying three-passes-combined process refine the grain size to 8.8 μm from an initial value of ∼150 μm. For one pass-and two passes-processed thin-walled tubes, it was about 12.4 and 9.8 μm, respectively. Yield and ultimate strengths were increased notably to 150 and 354 MPa for 2P+TBE tube, from the initial values of 86 and 166 MPa, respectively. The maximum microhardness was increased to about 105 Hv for the 2P+TBE tube from the initial value of 56 Hv. Hydro-bulge test showed that the bursting pressure increased to 246 bar for 2 passes-thin-walled tube from the initial value of 160 bar. It was 220 and 195 bar for 1 pass-and 3 passes-thin-walled tubes, respectively.

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Section: Mechanical Propertiessupporting

confidence: 94%

Microstructure and mechanical properties of fine-grained thin-walled AZ91 tubes processed by a novel combined SPD process

et al. 2017

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“…hardening and grain refinement were larger at early cycles of SPD processing [40,41]. At the intermediate passes,…”

Section: Mechanical Propertiesmentioning

confidence: 93%

Microstructure and mechanical properties of Al/Cu/Mg laminated composite sheets produced by the ARB proces

Rahmatabadi

Tayyebi

Hashemi

et al. 2018

Int J Miner Metall Mater

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In the present study, Al/Cu/Mg multi-layered composite was produced by accumulative roll bonding (ARB) through seven passes, and the microstructure and mechanical properties were evaluated. The microstructure investigations showed that plastic instability occurred for the both copper and magnesium reinforcing at the primary sandwich. Also, a composite with the perfectly uniform distribution of copper and magnesium reinforcing layers were prepared at the last pass. By increasing the number of ARB cycles, the microhardness of the layers including aluminum, copper, and magnesium was significantly increased. The ultimate tensile strength of the sandwich was enhanced continually and reached to the maximum value of 355.5 MPa. This strength value was about 3.2, 2 and 2.1 times higher than that of the initial value of strength for aluminum, copper and magnesium sheets, respectively. Investigation of the tensile fracture surfaces during the ARB process indicated that by increasing the number of the ARB passes, the fracture mechanism changed to shear ductile at the seventh pass.

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“…Recently, Faraji et al and M. Mesbah et al used PTCAP to fabricate ultrafine-grain (UFG) and nonstructural (NS) materials. The advantages of PTCAP have led to an increase in its use in tube processing compared to the Tubular Channel Angular Pressing (TCAP) process [25][26][27][28][29][30][31]. Interestingly, most previous work with the PTCAP of Cu and Al-brass has been performed using die angles of 120 • to 150 • and pressing rates of 5 to 10 mm/min.…”

Section: Introductionmentioning

confidence: 99%

Parallel Tubular Channel Angular Pressing (PTCAP) Processing of the Cu-20.7Zn-2Al Tube

Aal

Gadallah

2022

Materials

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Commercial Al-brass tube was successfully processed by Parallel Tubular Channel Angular Pressing (PTCAP) in 2 passes under an imposed strain of 1.49 per pass. The effect of the number of PTCAP passes on the microstructure and the mechanical properties (hardness, tensile, and wear mass loss) of the Al-brass tubes was fully investigated. The average grain size of the as-received tube decreased to 1.28 μm after up to two passes of PTCAP with a mixture of ultrafine grain (UFG) and coarse grain (CG). The annealed tubes’ tensile strength and Vickers hardness increased by 237.65% and 175.6%, respectively, after two passes. In addition, a ductile fracture occurred with a clear necking. The fracture surface morphology indicated an apparent decrease in dimple size after PTCAP processing, combined with a decrease in ductility. Moreover, the wear mass loss decreased with increasing number of PTCAP passes due to the decrease in the grain size, and the increase of the hardness of the tubes was enhanced after PTCAP processing.

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Evaluation of the microstructure and mechanical properties of the ultrafine grained thin-walled tubes processed by severe plastic deformation

Cited by 21 publications

References 28 publications

Microstructure and mechanical properties of fine-grained thin-walled AZ91 tubes processed by a novel combined SPD process

Microstructure and mechanical properties of fine-grained thin-walled AZ91 tubes processed by a novel combined SPD process

Microstructure and mechanical properties of Al/Cu/Mg laminated composite sheets produced by the ARB proces

Parallel Tubular Channel Angular Pressing (PTCAP) Processing of the Cu-20.7Zn-2Al Tube

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