In situ composites processed by simple shear

Segal, V. M.; Hartwig, K. T.; Goforth, R.E.

doi:10.1016/s0921-5093(96)10539-6

Cited by 98 publications

(68 citation statements)

References 10 publications

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“…[7][8][9] Realizing these outstanding material properties in structural applications requires methods of fabricating nanomaterials in the bulk form. Over the past few decades, severe plastic deformation (SPD) techniques, such as wire drawing, [10,11] high-pressure torsion (HPT), [12][13][14][15] equal channel angular pressing (ECAP), [16,17] and accumulative roll bonding (ARB), [18][19][20][21][22][23] have been employed to successfully make nanomaterials and nanolayered materials. The last two processes, ECAP and ARB, can potentially produce nanomaterials in sheets and rods in both sizes and quantities suitable for structural applications.…”

mentioning

confidence: 99%

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

Carpenter

Nizolek

McCabe

et al. 2014

Materials Research Letters

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mentioning

confidence: 99%

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

Carpenter

Nizolek

McCabe

et al. 2014

Materials Research Letters

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“…Equal channel angular extrusion (ECAE), also called equal channel angular pressing (ECAP) has been used to produce ultrafine-grained materials [10][11][12]. ECAP is a convenient forming procedure to extrude material by the use of specially designed channel dies without a substantial change in geometry [13].…”

Section: Equal Channel Angular Extrusion (Ecae) Processmentioning

confidence: 99%

Equal Channel Angular Extrusion Characteristics on Mechanical Behavior of Aluminum Alloy

Abioye¹,

Fayomi²,

Popoola³

et al. 2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

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Materials strengthened by conventional methods such as strain hardening, solute additions, precipitation and grain size refinement are often adopted in industrial processes. But there is limitation to the amount of deformation that these conventional methods can impact to a material. This study focused on the review of major mechanical properties of aluminum alloys in the presence of an ultrafine grain size into polycrystalline materials by subjecting the metal to an intense plastic straining through simple shear without any corresponding change in the cross-sectional dimensions of the sample. The effect of the heavy strain rate on the microstructure of aluminum alloys was in refinement of the coarse grains into ultrafine grain size by introducing a high density of dislocations and subsequently re-arranging the dislocations to form an array of grain boundaries. Hence, this investigation is aimed at gathering contributions on the influence of equal channel angular extrusion toward improving the mechanical properties of the aluminum alloys through intense plastic strain.

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“…The process involves the extrusion of a well lubricated billet through two intersecting channels of identical cross-section. Deformation is achieved by simple shear along the intersecting plane of the two channels [59]. Fig.…”

Section: Ecae Processmentioning

confidence: 99%

“…4 passes with no rotation between multiple passes) at 300ºC. The ECAE process spreads out grain boundaries (i.e., elongates the grains as if the material were rolled) and therefore disperses the zirconium particles over a larger volume [59].…”

Section: Ecae Processing Of the Original Magnesium-15 Wt% Zirconium Mmentioning

confidence: 99%

An Analysis of the Grain Refinement of Magnesium by Zirconium

Saha

Viswanathan

2011

Magnesium Technology 2011

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A Design of Experiments (DOE) approach was used to conduct a systematic study of the grain refinement of magnesium by zirconium; variables included the amount of zirconium, the pouring temperature, and the settling time prior to casting. Samples were poured into a special "hockey puck" mold designed to reproduce the conditions in permanent mold casting. Optical and scanning electron microscopy (SEM) was utilized to measure the grain size in the final microstructure. Sample dissolution followed by SEM was used to characterize zirconium particle size and morphology both in the master alloy and grain refined samples, while an AccuSizer 770 Photozone/Light Obscuration instrument was used to measure total particle size distributions in the master alloy and grain refined samples. Transmission Electron Microscopy (TEM) was used to identify particles that likely act as suitable heterogeneous nucleation sites for grain refinement.The TEM results show that a range of particle sizes are likely substrates and that only zirconium particles which are faceted are likely nucleation sites. It is apparent that only 1 to 3% of the total particles serve as nucleation sites, but a comparison of the grain density vs. faceted particle density shows close agreement. Equal Channel Angular Extrusion (ECAE) processing of the magnesium-15wt% zirconium master alloy to increase the number of faceted particles resulted in improved grain refinement efficacy. This work suggests that there is a tremendous potential to engineer a more efficient grain refiner.iii

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In situ composites processed by simple shear

Cited by 98 publications

References 10 publications

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

Equal Channel Angular Extrusion Characteristics on Mechanical Behavior of Aluminum Alloy

An Analysis of the Grain Refinement of Magnesium by Zirconium

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