Shear deformation and plate shape control of hot-rolled aluminium alloy thick plate prepared by asymmetric rolling process

Zuo, Yubo; Fu, Xing; Chen, Jianzhong; Tang, Xiangyu; Mao, Lu; Li, Lei; Zhu, Qingfeng

doi:10.1016/s1003-6326(14)63336-7

Cited by 14 publications

(8 citation statements)

References 11 publications

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“…The side with the smallest diameter has the lowest torque as it has smaller level arm [15]. Zuo et al [21] reported that in the case of aluminium hot rolling, the forces of the ASR were 5%-30% lower than those of symmetric rolling (Figure 7). Asymmetrical rolling was achieved with roll diameters with which velocity ratios of 1.07 and 1.20 were obtained.…”

Section: Rolling Force and Torquementioning

confidence: 99%

“…This can significantly change the metal deformation stream and can influence the microstructure evolution. Zuo et al [21] investigated the evolution of microstructures through the thickness of hotrolled aluminium plates for both conventional and ASR (Figure 9). In the case of CR, a finegrained microstructure at the upper and lower surfaces and a coarse microstructure in the centre are found.…”

Section: Microstructurementioning

confidence: 99%

“…Negligible numbers of scientific papers have been published until the beginning of the year 2000 when ASR became more interesting for research [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. A significant increase in publications has been noticed in the past few years [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. They deal with hot and cold rolling, rolling of steels [13], aluminium [2-6, 8, 12, 16, 20-22, 29, 31, 34], titanium [30], magnesium [16,23] and their alloys, as well as flat, wire [25] and rod rolling [28].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Asymmetric rolling process

Fajfar

Lah

Kraner

et al. 2017

Materials and Geoenvironment

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Asymmetric rolling is a novel technique used to control both the texture and the grain refinement of metallic materials. The aim of asymmetric rolling is to apply a large shear strain uniformly through the thickness of the plate, by maintaining a high degree of friction between the sheet and the rolls. It can be used to improve the formability of material. One of the advantages of asymmetrical rolling is that the rolling force and torque can be decreased. The methods used for the asymmetric rolling are single roll drive, different work roll speeds, different work roll diameters or different lubricated work roll surfaces. IzvlečekAsimetrično valjanje je novejša tehnika preoblikovanja, ki se uporablja za kontrolo teksture in za zmanjšanje zrnatosti valjanega materiala. Pri asimetričnem valjanju nastanejo zaradi velikega trenja na stiku valjanega materiala in valjev velike strižne deformacije po celotnem preseku valjanca. S to tehniko se lahko izboljšajo preoblikovalne lastnosti materiala. Ena od prednosti asimetričnega valjanja je tudi zmanjšanje sile in momenta valjanja. Asimetrično valjanje lahko izvajamo na naslednje načine: z le enim gnanim valjem, različnima hitrostima valjev, različnima premeroma valjev ali pa z (ne)uporabo različnih lubrikantov na površini valjev.

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Section: Rolling Force and Torquementioning

confidence: 99%

Section: Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Asymmetric rolling process

Fajfar

Lah

Kraner

et al. 2017

Materials and Geoenvironment

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“…Based on the results of asymmetric cold rolling, asymmetric hot rolling can be a good way to improve the uniformity of microstructure and properties of plate and strip [4,5,6]. Compared with the symmetric rolling, the asymmetric rolling can generate an additional shear deformation and significantly change the metal deformation stream, lead to the finer and more uniform microstructure of 5182 aluminum alloy thick plate after multi-pass hot rolling [7]. Using a combination of casting, asymmetric rolling, and subsequent T6 treatment, Al alloy sheet exhibited strength exceeding that of the commercial Al alloy sheets with similar compositions.…”

Section: Introductionmentioning

confidence: 99%

Grain Size Analysis of Hot-rolled Steel Sheet Produced by Multi-pass Alternate Asymmetric Rolling

Zhang¹,

Hong²,

Zhang³

et al. 2017

dtetr

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Abstract. In order to study the microstructural evolution of C45 sheet in during hot-rolling, several thermo mechanical coupled finite element models (FEM) are established. The effects of different speed ratio, friction coefficient, initial thickness, initial temperature, roll diameter and roll speed on the average grain size after finishing rolling are analyzed. In this work, a multi-pass alternate asymmetric rolling (MAAR) process is intended to refine the grain structure. The values of grain size are predicted by FEM. The results show that MAAR greatly reduced the initial grain, while the final grain size is significantly reduced by ascending of the initial thickness, speed ratio and roll diameter, but is expanded in a certain range by two enlarged or accelerated work rolls. This study indicates that under the appropriate process conditions, MAAR can refine the final grain better than the traditional multi-pass hot rolling.

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“…Plate rolling technology has progressed rapidly, and the developments of gauge control, 1,2) crown control 3) and plan view control 4,5) have contributed to decreasing the yield loss. Some noteworthy rolling methods for getting a better plan view pattern were applied in commercial producing and obtained a certain effect, such as MAS rolling (Mizushima Automatic plan view pattern System rolling) 6) and DBR (Dog-Bone Rolling).…”

Section: Introductionmentioning

confidence: 99%