Rotary-die equal-channel angular pressing of an Al – 7 mass% Si – 0.35 mass% Mg alloy

Nishida, Yoshihiro; Arima, Hiroaki; Kim, Jin-Chun; Ando, Teiichi

doi:10.1016/s1359-6462(01)00985-x

Cited by 110 publications

(45 citation statements)

References 14 publications

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“…Nishida et al [4] developed rotary-die ECAP (RD-ECAP), a procedure that effectively circumvents the limitation of the removing and re-inserting procedure. The billet can be continuously pressed by rotating the die during passes.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, multiple passes of ECAP can be rapidly and easily carried out on the samples without removing them from the die. RD-ECAP processing is categorized into route A in the conventional ECAP process, by which the sample is pressed without rotation between passes [4]. However, it should be noted that the front and rear parts of samples were alternated in RD-ECAP, while the pressing direction was the same in the conventional ECAP process by route A.…”

Section: Introductionmentioning

confidence: 99%

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Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing

Jiang

et al. 2017

Metals

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Pure titanium was efficiently processed up to four passes at 420 • C by rotary-die equal-channel angular pressing (RD-ECAP). The deformation structure and mechanical properties of pure titanium with various RD-ECAP passes were subsequently investigated. Microstructure evolution revealed that plastic deformation was accommodated mainly by twins during the first and second passes, while the predominant deformation mechanism was dislocation slip during the third and fourth passes. {1012} twins were detected in the first pass, and {1011} twins occurred in the second pass of RD-ECAP. The ultimate tensile strength of pure titanium increased from 450 MPa in the as-received state to 627 MPa with a fracture elongation of 29% after four passes of RD-ECAP.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing

Jiang

et al. 2017

Metals

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“…RD-ECAP was performed at 573 K, 623 K or 673 K for 4, 8 and 16 times, respectively. As described in the literature, 11) RD-ECAP can permit a continuous pressing cycle without billet removal.…”

Section: Methodsmentioning

confidence: 99%

“…In order to make this process more efficient, Nishida developed a new ECAP process by attaching a rotary die, namely RD-ECAP. 11) Using this RD-ECAP equipment, the pressing time for up to 16 pressings was performed in 8 minutes on aluminum and magnesium alloys which obtained a fine-grained microstructure. 12,13) It is known that the cast Al-11mass%Si eutectic alloys are usually used for automobile engine pistons because of their good mechanical properties, which include good wear resistance and low expansion coefficient at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Impact Toughness of Aluminum Silicon Eutectic Alloy Processed by Rotary-Die Equal-Channel Angular Pressing

Saito

Shigematsu

et al. 2004

Mater. Trans.

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A Rotary-die equal-channel angular pressing (RD-ECAP) process was applied to improve the impact toughness of Al-11mass%Si eutectic alloy (AC8A). RD-ECAP was effective at improving impact toughness: the impact toughness increased as the number of pressings increased. In addition, the effects of heat treatments on impact toughness were investigated. When samples were heat-treated under the T6 condition before the RD-ECAP process, they exhibited a higher impact toughness than the samples without T6 treatments. The absorbed energy of the heattreated samples followed by RD-ECAP 4 times was 4.32 J/cm 2 , which was much higher than that of the non-heat-treated samples, 2.89 J/cm 2 , and three times higher than the value of the heat-treated but non-processed samples, 1.08 J/cm 2 . The results show that the combination of the T6 treatment and the RD-ECAP process is more effective at improving the impact toughness, compared to applying the RD-ECAP process alone.

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“…Recently, a new ECAP process method called rotary-die ECAP (RD-ECAP) 6) was developed by the author's group to form fine-grained bulk materials such as aluminium alloys, magnesium alloy and aluminium composites, [7][8][9][10][11][12] all of which can be processed under conditions of 573-673 K, at about a 0.9-2.4 mm/s punch speed of 300 MPa or lower. Schematic diagrams of the RD-ECAP are shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Commercial Purity Titanium Processed by Rotary-Die Equal Channel Angular Pressing Method

Watazu

Shigematsu

et al. 2005

Mater. Trans.

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Commercial purity titanium cylindrical samples with a diameter of 11.5 mm and a length of 24 mm were processed under the condition of 773 K, 2.4 mm/s punch, 1-4 equal channel angular pressing passes by a new severe plastic deformation process called the rotary-die equal channel angular pressing (RD-ECAP) process. Using this process, it was possible to conduct an ECAP process of 2 passes or over without sample removal, and the temperature of the commercial purity titanium could be controlled. Following the RD-ECAP process, the commercial purity titanium contained no cracks, and fine-grained microstructures were observed in the samples.

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Rotary-die equal-channel angular pressing of an Al – 7 mass% Si – 0.35 mass% Mg alloy

Cited by 110 publications

References 14 publications

Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing

Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing

Effect of Heat Treatment on Impact Toughness of Aluminum Silicon Eutectic Alloy Processed by Rotary-Die Equal-Channel Angular Pressing

Commercial Purity Titanium Processed by Rotary-Die Equal Channel Angular Pressing Method

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