Microstructure Evolution in High Purity Aluminum Single Crystal Processed by Equal Channel Angular Pressing (ECAP)

Dong, Jianwei; Dong, Qing; Dai, Yong; Xing, Hui; Han, Yanfeng; Ma, Jianbo; Zhang, Jiao; Wang, Jun; Sun, Baode

doi:10.3390/ma10010087

Cited by 8 publications

(5 citation statements)

References 31 publications

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“…Severe plastic deformation (SPD) techniques have been extensively reported to effectively enhance the mechanical properties of metallic materials [17,18,19,20,21]. For instance, excellent tensile properties (including high yield or ultimate stress and elongation), as well as extremely high impact toughness, can be obtained in Al alloys using equal-channel angular pressing (ECAP), especially via the multipass ECAP process [22,23]. The primary reason for the remarkable improvement in mechanical properties by ECAP processing is the effective microstructure refinement induced by imposed severe strain, which offers significant strengthening via grain boundary strengthening [24].…”

Section: Introductionmentioning

confidence: 99%

Promoted Anodizing Reaction and Enhanced Coating Performance of Al–11Si Alloy: The Role of an Equal-Channel-Angular-Pressed Substrate

et al. 2019

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In this paper, the effect of the equal-channel-angular-pressed (ECAPed) substrate on the coating formation and anticorrosion performance of the anodized Al–11Si alloy was systematically investigated. The ECAP process dramatically refines both Al and Si phases of the alloy. The parallel anodizing circuit is designed to enable a comparative study of anodizing process between the cast and the ECAPed alloys by tracking their respective anodizing current quota. The optimum coatings of both alloys were obtained after anodization for 30 min. The ECAPed alloy attained a thicker, more compact, and more uniform coating. Energetic crystal defects in the fine Al grains of the ECAPed substrate promote the anodizing reaction and lead to the thicker coating. Fragmented and uniformly distributed fine Si particles in the ECAPed alloy effectively suppress the coating cracks, enhancing the compactness of the coating. Overall, the ECAP-coated sample exhibits the best anticorrosion performance, which is evidenced by the concurrently enhanced prevention of coating and improved corrosion resistance of the substrate.

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Section: Introductionmentioning

confidence: 99%

Promoted Anodizing Reaction and Enhanced Coating Performance of Al–11Si Alloy: The Role of an Equal-Channel-Angular-Pressed Substrate

et al. 2019

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“…For both ECAP and HPT, the saturation of grain size occurs whenever there is a balance between the formation of dislocation structure and its recovery [37,45,46]. Moreover, for both ECAP and HPT, the evolution of the grain size with the strain follows the same trend: at lower stains, the grain size is rapidly decreased with increasing the strain, then it slows down and finally remains constant with further straining [46-48]. In fact, although the limiting grain sizes may be different for ECAP and HPT, steps that eventually lead to these limiting grain sizes are the same. Such a power law relation is also in accordance with previous experimental findings [38].…”

Section: Resultsmentioning

confidence: 99%

Limiting grain size through high-pressure torsion of different materials

Parvin

Kazeminezhad

2020

Materials Science and Technology

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The main goal of high-pressure torsion (HPT) process is to reduce the grain size. Experiments have shown that this aim is achievable, but there is a limit in reducing the grain size. The present paper investigates this limit through a thermodynamics-based model. However, this was investigated by other researches through dislocation density-based model. At first, the validity of the model in description of the limiting grain size obtainable by HPT of different materials is examined. Then, the influence of inherent material parameters is investigated. Finally, the present results are compared with those obtained by equal channel angular pressing.

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“…8c also shows the fine intermetallics in Alloy 3. It is also observed that the intermetallics are extremely refined by the fast cooling in the high Fe and Si containing alloys (Alloy 2 and Alloy 3) [33].…”

Section: Optical Micrographsmentioning

confidence: 95%

Fractional Recrystallization Behavior of Impurity-Doped Commercially Pure Aluminum

Kaiser

2020

JEMMME

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This manuscript reports the effects of trace impurities on the fractional recrystallization behavior of commercially pure aluminum. To allow the recrystallization cold rolled by 75% alloy samples are annealed isothermally at 700ºK for different time up to 60 minutes. Recrystallization kinetics is evaluated from the micro hardness variation of the different annealed samples. The JMAK type analysis is also used to study the recrystallization behavior as well as to observe the correlation with the experimental results. The behavior of the fraction recrystallization between two methods the trace impurities added alloys is evidence for the higher variation as to form GP zones and metastable phases during annealing. Higher addition shows the more variation as the formation of higher fraction phases. The microstructural study reveals that annealing at 700ºK for 30 minutes the alloys attain almost fully re-crystallized state.

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Microstructure Evolution in High Purity Aluminum Single Crystal Processed by Equal Channel Angular Pressing (ECAP)

Cited by 8 publications

References 31 publications

Promoted Anodizing Reaction and Enhanced Coating Performance of Al–11Si Alloy: The Role of an Equal-Channel-Angular-Pressed Substrate

Promoted Anodizing Reaction and Enhanced Coating Performance of Al–11Si Alloy: The Role of an Equal-Channel-Angular-Pressed Substrate

Limiting grain size through high-pressure torsion of different materials

Fractional Recrystallization Behavior of Impurity-Doped Commercially Pure Aluminum

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