Impact toughness of an ultrafine-grained Al–11mass%Si alloy processed by rotary-die equal-channel angular pressing

Ma, Aibin; Suzuki, Ken; Nishida, Yoshihiro; Saito, Naobumi; Shigematsu, Ichinori; Takagi, Makoto; Iwata, Hiroyuki; Watazu, Akira; Imura, Toru

doi:10.1016/j.actamat.2004.09.017

Cited by 127 publications

(53 citation statements)

References 19 publications

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“…These particles are progressively refined and become smaller and more equiaxed with increasing number of passes ( Fig. 3c and d) [18][19][20]. Fig.…”

Section: Microstructurementioning

confidence: 99%

Influence of microstructural stability on the creep mechanism of Al–7wt% Si alloy processed by equal channel angular pressing

Orozco‐Caballero¹,

Menon

Cepeda-Jiménez³

et al. 2014

Materials Science and Engineering: A

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“…These particles are progressively refined and become smaller and more equiaxed with increasing number of passes ( Fig. 3c and d) [18][19][20]. Fig.…”

Section: Microstructurementioning

confidence: 99%

Influence of microstructural stability on the creep mechanism of Al–7wt% Si alloy processed by equal channel angular pressing

Orozco‐Caballero¹,

Menon

Cepeda-Jiménez³

et al. 2014

Materials Science and Engineering: A

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“…9,21,22) Consequently, these microstructural changes result in the significant improvement of mechanical properties. Ma et al [23][24][25][26] studied the influence of ECAP processing on the tensile properties and impact toughness of Al-Si casting alloys. The results indicated that the ductility and the impact toughness were significantly improved by ECAP processing because of the refinement of the primary -Al and the homogeneous distribution of the eutectic Si particles.…”

Section: Introductionmentioning

confidence: 99%

Effect of Eutectic Si Particle Morphology on ECAP Formability and Mechanical Properties of AC4CH Aluminum Casting Alloys

Nakayama

Miyazaki

2011

Mater. Trans.

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AC4CH casting alloys were subjected to the 2-step preheating and the ECAP processing at room temperature. Microstructure change was investigated in terms of size and globularity of the eutectic Si particles and hardness of the primary and the eutectic -Al. The effects of 2-step preheating, ECAP processing and standard T6 heat treatment on the hardness and the tensile properties were also investigated. The results of this study are as follows. The ECAP formability was significantly improved by the optimum 2-step preheating (1st-step preheating at 560 C and 2nd-step preheating at 350 C). More than 12-times ECAP pressing (equivalent strain of about 5.6) could be made without cracking. The hardness distribution in the primary -Al suggested that the accumulated plastic strain during the ECAP processing increased gradually toward the eutectic cell regions. The hardness measurement also showed that the accumulated plastic strain of the eutectic -Al around less-globular Si particles was higher than that around globular Si particles. Concentration of the plastic strain may promote cracking in the eutectic cell regions and deteriorate the ECAP formability. Successive processing by the 2-step preheating, the ECAP processing and the standard T6 heat treatment brought about globularity and homogeneous distribution of the eutectic Si particles. During the tensile deformation, these microstructural features might lead to homogeneous distribution of the plastic strain, suppressions of the cracking of Si particles and the delamination between the Si particle and the matrix. As a result, the 0.2% proof stress and the fracture strain increased about 11% and 47% respectively compared with those of the standard T6 treated sample.

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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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Impact toughness of an ultrafine-grained Al–11mass%Si alloy processed by rotary-die equal-channel angular pressing

Cited by 127 publications

References 19 publications

Influence of microstructural stability on the creep mechanism of Al–7wt% Si alloy processed by equal channel angular pressing

Influence of microstructural stability on the creep mechanism of Al–7wt% Si alloy processed by equal channel angular pressing

Effect of Eutectic Si Particle Morphology on ECAP Formability and Mechanical Properties of AC4CH Aluminum Casting Alloys

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

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