Microstructural evolution and wear characteristics of equal channel angular pressing processed semi-solid-cast hypoeutectic aluminum alloys

Thường, Nguyễn Văn; Hussain, Zuhailawati; Seman, Anasyida Abu; Huy, Tran Duc; Dhindaw, B. K.

doi:10.1016/j.matdes.2014.11.054

Cited by 58 publications

(15 citation statements)

References 27 publications

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“…Figure 6b displays the EDX map of the distribution of Si particles, after the ECAP process for the cooling slope sample. Due to the microstructural evolution, after the processes of semisolid casting, coupled with ECAP, it was expected that the finer formation and homogeneous distribution of α-Al and eutectic mixture phase enhanced the mechanical properties of the material [51]. Figure 7 reveals optical micrographs of the surface morphology, before and after the processes of ECAP, after immersion in 3.5% NaCl solution for ten days, for both the as-cast and cooling slope-cast samples.…”

Section: Surface Morphologymentioning

confidence: 99%

Microstructural Evaluation and Corrosion Resistance of Semisolid Cast A356 Alloy Processed by Equal Channel Angular Pressing

Gebril

Omar

Mohamed

et al. 2019

Metals

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As-cast and semisolid casting using a cooling slope A356 alloy were processed by equal channel angular pressing (ECAP) for Si and grain refinement. The ECAP was conducted at room temperature in a mold, with a channel angle of 120°, and this resulted in a significant size reduction of grain and Si particles from 170.5 and 4.22 to 23.12 and 0.71 µm, respectively, after six passes of heat-treated cooling slope casting, using the ECAP process. The hardness increased with ECAP processing, from 61 HV, for the as-cast alloy, to 134 Hv, after six passes of heat-treated cooling slope casting. The corrosion resistance of the alloy improved, from 0.042 to 0.0012 mmy−1, after the ECAP process. In this work both the strength and corrosion resistance of the ECAPed A356 alloys were improved with the application of the cooling slope process than without (i.e., from the as-cast condition).

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Section: Surface Morphologymentioning

confidence: 99%

Microstructural Evaluation and Corrosion Resistance of Semisolid Cast A356 Alloy Processed by Equal Channel Angular Pressing

Gebril

Omar

Mohamed

et al. 2019

Metals

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“…In eutectic nucleation, the silicon phase grows in a random direction to form flakes or needle type structure as shown in figure 2(b). Around this silicon phase, aluminium precipitates out to form the eutectic mixture [23,24]. Optical micrographs of SRC composites and RRC composites at 5 wt% and 15 wt% of reinforcement level are presented in figures 3(a)-(f).…”

Section: Microstructural Characterizationmentioning

confidence: 99%

A comparative study of dry sliding wear behaviour of sillimanite and rutile reinforced LM27 aluminium alloy composites

Gupta

Sharma

Nanda

et al. 2020

Mater. Res. Express

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The present work compares the dry sliding wear characteristics of sillimanite reinforced and rutile reinforced LM27 aluminium alloy based composites prepared by stir casting process. Particles in the size range of 1-32 μm were added in 5, 10, and 15 wt%. Microstructure, nanohardness, coefficient of friction, and wear rate characteristics were evaluated. Optical microscopy revealed uniform distribution of both sillimanite and rutile particles in the matrix. The hardness of sillimanite reinforced composites was higher than rutile reinforced composites. Further, the wear resistance of sillimanite reinforced composites was superior to rutile reinforced composites. However, coefficient of friction values of sillimanite particle reinforced composites were higher than the rutile particle reinforced composites. SEM-EDS analysis of wear track and wear debris revealed that abrasive wear and adhesion/delamination mechanisms were responsible for the wear of composites at low and high applied load conditions respectively.

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“…14(b). Thuong et al [27] pointed that the appearance of craters in the worn surface was due to the detachment of wear debris during the delamination wear. Then the detached debris may become abrasive material in the contact surface, thus leading to the formation of grooves [26].…”

Section: Hardnessmentioning

confidence: 99%

Flow mechanism of 9Cr18 steel during thixoforging and its properties for functionally graded material

Wang

Song

2015

Materials & Design

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Microstructural evolution and wear characteristics of equal channel angular pressing processed semi-solid-cast hypoeutectic aluminum alloys

Cited by 58 publications

References 27 publications

Microstructural Evaluation and Corrosion Resistance of Semisolid Cast A356 Alloy Processed by Equal Channel Angular Pressing

Microstructural Evaluation and Corrosion Resistance of Semisolid Cast A356 Alloy Processed by Equal Channel Angular Pressing

A comparative study of dry sliding wear behaviour of sillimanite and rutile reinforced LM27 aluminium alloy composites

Flow mechanism of 9Cr18 steel during thixoforging and its properties for functionally graded material

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