The Influence of Processing on Microstructural Development, Tensile Response and Fracture Behavior of Aluminum Alloy 5083

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In this paper, the specific influence of quasi-isostatic forging and rolling of cryomilled powder on microstructural development and resultant tensile deformation and fracture behavior of aluminum alloy 5083 is highlighted and comparison made with the coarse grained counterpart. The specific influence and contribution of strain hardening to enhancing strength of the ultra-fine grain microstructure of the aluminum alloy is presented and discussed. It is shown that the capability of the ultra fine grain microstructure to recover strength through the mechanism of work hardening is quite similar to the conventionally processed counterpart. The influence and role of intrinsic microstructural features in governing tensile deformation and fracture behavior is elaborated upon. The viable microscopic mechanisms governing final fracture behavior is discussed in light of the competing and mutually interactive influences of nature of loading, intrinsic microstructural effects, and deformation kinetics. Key Words: aluminum alloy 5083, processing, microstructure, tensile properties, fracture

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Periodical:

Edited by:

Alan K.T. Lau, T. S. Srivatsan, Debes Bhattacharyya, Ming Qiu Zhang and Mabel M. P. Ho

Pages:

175-186

DOI:

10.4028/www.scientific.net/AMR.410.175

Citation:

T. D. Topping et al., "The Influence of Processing on Microstructural Development, Tensile Response and Fracture Behavior of Aluminum Alloy 5083", Advanced Materials Research, Vol. 410, pp. 175-186, 2012

Online since:

November 2011

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Price:

$35.00

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25 Balance Table 2: Mechanical properties, grain size and dislocation density data for cryomilled, UFG plate and conventional AA 5083. ID With pct. COLD ROLLING.

2% YS (MPa) UTS (MPa) % EL Grain Size (nm) Dis. Dens. (ρ/m2) UFG, R0 372. 3 449. 4.

[16] 0 590.

[2] 1E+15 UFG, R20 428. 5 508. 2.

[11] 6 554.

[3] 7E+15 UFG, R30 468. 0 519. 6.

[7] 1 510.

[9] 1E+15 UFG, R40 473. 7 551. 2.

[7] 3 474.

[1] 3E+16 UFG, R50 515. 4 563. 8.

[6] 6 439.

[1] 5E+16 AA 5083-O 123 289.

[24] 7 - - AA 5083-H131 265 352.

[10] 2 - - Figure 2: A comparison of strength and ductility of the cold worked cryomilled, UFG plate and the conventional AA 5083 in the H131 and O tempers.

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