ARB (Accumulative Roll‐Bonding) and Other New Techniques to Produce Bulk Ultrafine Grained Materials

Tsuji, Nobuhiro; Saito, Yoshihiro; Lee, Seong-Hee; Minamino, Yoritoshi

doi:10.1002/3527602461.ch9a

Cited by 15 publications

(20 citation statements)

References 29 publications

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“…In order to obtain the UFG structures, the severe plastic deformation (SPD) process [4,5], for example accumulative roll-bonding (ARB) [6 -10] equal channel angular pressing (ECAP) [11 -13] high pressure torsion (HPT) [14,15] and mechanical milling [16] is occasionally used. These processes have successfully achieved ultra grain refinement [6 -16].…”

Section: Introductionmentioning

confidence: 99%

Effect of rolling reduction on ultrafine grained structure and mechanical properties of low-carbon steel thermomechanically processed from martensite starting structure

Ueji

Tsuji

Minamino

et al. 2004

Science and Technology of Advanced Materials

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109

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The present authors have invented a novel and simple thermomechanical processing to realize the ultrafine grained microstructure in carbon steels. The key of the process is to start from martensite structure. In the previous study, it has been clarified that conventional coldrolling to a reduction in thickness of only 50% (equivalent strain of 0.8) and subsequent annealing at warm temperature around 500 8C fabricates the multi-phased ultrafine grained structure composed of the ultrafine ferrite grains with mean grain size of 180 nm, uniformly precipitated nano cementite and tempered martensite. In this study, the effect of the rolling reduction ranging from 25 to 70% (equivalent strains of 0.3-1.5) on the ultrafine grained structure and the mechanical properties of the plain low-carbon steel (Fe -0.13 wt% C) processed from martensite starting structure was studied. In the as-deformed specimen, the area fraction of the region showing the lamellar structure, which is typical for severely rolled metals, increased with increasing the rolling reduction and the strength also increased. After annealing at warm temperature around 500 8C, the multi-phased ultrafine grained microstructures were obtained in all the examined rolling reductions. The area fraction of the region showing the ultrafine ferrite grains increased with increasing the rolling reduction. At higher temperature, conventional recrystallization took place, and the recrystallization temperature became lower with increasing the reduction. Tensile test exhibited that the specimen rolled to the intermediate reduction (50%) performed the best strength-ductility balance (870 MPa of tensile strength and 9% of uniform elongation). The reason for the good strength-ductility balance of the specimen rolled to the intermediate reduction was discussed on the basis of the observed microstructures. q

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Section: Introductionmentioning

confidence: 99%

Effect of rolling reduction on ultrafine grained structure and mechanical properties of low-carbon steel thermomechanically processed from martensite starting structure

Ueji

Tsuji

Minamino

et al. 2004

Science and Technology of Advanced Materials

Self Cite

109

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“…The ultrafine-grained pure copper samples reach UTS between 400 and 450 MPa, which is typically achieved by accumulative roll bonding on pure copper [2,[24][25][26][27]. Aluminum particle reinforcement leads to a slight strengthening, which may be based on local straining and onset of dissolution of aluminum in copper and therewith slight solid solution strengthening due to processing at 125 °C.…”

Section: Copper Reinforced With Aluminummentioning

confidence: 99%

“…The accumulative roll bonding (ARB) process is a method of severe plastic deformation for sheet production and has been studied extensively regarding the evolution of microstructure and mechanical properties [1][2][3]. Besides the formation of an ultrafine-grained microstructure, this process offers a OPEN ACCESS high potential for tailoring properties of ultrafine-grained materials [4,5].…”

Section: Introductionmentioning

confidence: 99%

Particle Based Alloying by Accumulative Roll Bonding in the System Al-Cu

Schmidt

Knödler

Höppel

et al. 2011

Metals

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Abstract:The formation of alloys by particle reinforcement during accumulative roll bonding (ARB), and subsequent annealing, is introduced on the basis of the binary alloy system Al-Cu, where strength and electrical conductivity are examined in different microstructural states. An ultimate tensile strength (UTS) of 430 MPa for Al with 1.4 vol.% Cu was reached after three ARB cycles, which almost equals UTS of the commercially available Al-Cu alloy AA2017A with a similar copper content. Regarding electrical conductivity, the UFG structure had no significant influence. Alloying of aluminum with copper leads to a linear decrease in conductivity of 0.78 µΩ·cm/at.% following the Nordheim rule. On the copper-rich side, alloying with aluminum leads to a slight strengthening, but drastically reduces conductivity. A linear decrease of electrical conductivity of 1.19 µΩ·cm/at.% was obtained.

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“…Other SPD techniques include High Pressure Torsion (HPT) [10], Multi-Directional Forging (MDF) [11], Cyclic Extrusion and Compression (CEC) [12], and so on. The details of these SPD techniques are reviewed in various publications, e.g., [7,[13][14][15][16][17], and will not be elaborated on here.…”

Section: Introductionmentioning

confidence: 99%

The Cyclic Deformation Behavior of Severe Plastic Deformation (SPD) Metals and the Influential Factors

Kwan

Wang

2012

Metals

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Abstract:A deeper understanding of the mechanical behavior of ultra-fine (UF) and nanocrystalline (NC) grained metals is necessary with the growing interest in using UF and NC grained metals for structural applications. The cyclic deformation response and behavior of UF and NC grained metals is one aspect that has been gaining momentum as a major research topic for the past ten years. Severe Plastic Deformation (SPD) materials are often in the spotlight for cyclic deformation studies as they are usually in the form of bulk work pieces and have UF and NC grains. Some well known techniques in the category of SPD processing are High Pressure Torsion (HPT), Equal Channel Angular Pressing (ECAP), and Accumulative Roll-Bonding (ARB). In this report, the literature on the cyclic deformation response and behavior of SPDed metals will be reviewed. The cyclic response of such materials is found to range from cyclic hardening to cyclic softening depending on various factors. Specifically, for SPDed UF grained metals, their behavior has often been associated with the observation of grain coarsening during cycling. Consequently, the many factors that affect the cyclic deformation response of SPDed metals can be summarized into three major aspects: (1) the microstructure stability; (2) the limitation of the cyclic lifespan; and lastly (3) the imposed plastic strain amplitude.

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ARB (Accumulative Roll‐Bonding) and Other New Techniques to Produce Bulk Ultrafine Grained Materials

Cited by 15 publications

References 29 publications

Effect of rolling reduction on ultrafine grained structure and mechanical properties of low-carbon steel thermomechanically processed from martensite starting structure

Effect of rolling reduction on ultrafine grained structure and mechanical properties of low-carbon steel thermomechanically processed from martensite starting structure

Particle Based Alloying by Accumulative Roll Bonding in the System Al-Cu

The Cyclic Deformation Behavior of Severe Plastic Deformation (SPD) Metals and the Influential Factors

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