Microstructural and Hardness evolution of AZ80 alloy after ECAP and post-ECAP processes

Naik, Gajanan M.; Gote, Gopal; Narendranath, S.

doi:10.1016/j.matpr.2018.06.100

Cited by 17 publications

(5 citation statements)

References 7 publications

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“…Increasing the temperature of the ECAP process reduces the amount of strain hardening, which is related to the intense dislocation annihilation through thermally activated processes. For this reason, as the deformation temperature increases, the dislocation density decreases, which is confirmed by the works [22,23], as well as the GNDs density analysis shown in Fig. 11.…”

Section: Resultssupporting

confidence: 74%

“…8a), where a large share of high-angle boundaries can be observed. A strong extreme at ϴ = 60º according to the literature [22][23] confirms the presence of twin boundaries Σ3 (60º <111 >).…”

Section: Resultsmentioning

confidence: 63%

“…It should be mentioned that in Cu alloys, significant strengthening due to intense plastic deformation is not accompanied by a noticeable decrease in electrical conductivity [15][16][17]. The ECAP method is most often used for refinement of Al alloys [6,12,13,[18][19][20][21][22][23], Mg alloys [7,14,24], copper alloys [3,6,[15][16][17][25][26][27][28][29][30], titanium alloys [31,32], as well as mild steels [33,34]. In the case of copper alloys, this method is most often used for alloys containing such elements as Zn, Al, Mg and Co [15,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Effect of ECAP process on deformability, microstructure and conductivity of CuCoNi alloy

Grzegorczyk

Rusz

Snopiński

et al. 2023

J min metall B Metall

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The study concerns the influence of various variants of severe plastic deformation in the Equal Channel Angular Pressing (ECAP) process on the microstructure, microhardness and conductivity of the CuCoNi alloy. The evolution of the microstructure was investigated by microscopic observations and electron back-scattered diffraction (EBSD) in a scanning electron microscope (SEM). Using the Vickers method, tests of microhardness of samples were performed after various variants of the ECAP process. The conductivity was measured with an eddy current device for measuring electrical conductivity based on the complex impedance of the measuring probe. The results indicated the possibility of deformation of CuCoNi alloys in the process of pressing through the ECAP angular channel and developing their microstructure and properties. The method is an effective tool for strengthening the tested copper alloy by refinement of the microstructure. After the first pass, the grain size was reduced by 80%. Increasing the plastic deformation temperature did not significantly affect the obtained level of microstructure fragmentation - the average grain size is approx. 1.4-1.5 ?m. The fragmentation of the microstructure had a negligible effect on the conductivity of the CuCoNi alloy, which after the ECAP process oscillated at the value of 13 MS/m.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

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Effect of ECAP process on deformability, microstructure and conductivity of CuCoNi alloy

Grzegorczyk

Rusz

Snopiński

et al. 2023

J min metall B Metall

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“…This process is repeated by using route R, where the samples were inverted from its initial position between two successive passes as shown in Figure 5(a). The processed samples after ECAP operation is shown in Figure 5(b) [7][8][9][10][11][12].…”

Section: Equal Channel Angular Extrusionmentioning

confidence: 99%

“…Specimens for microstructure inspection were prepared by mechanical polishing with silicon carbide abrasive papers (grades of 400, 800, 1000, 1200, 1500, 2000) followed by cloth polishing using diamond paste and kerosene for obtaining mirror finish surface and finally cleaned with acetone. Further, Etching was carried on the polished surface for approximately 3 to 5 s, in a solution of 4.2 g picric acid, 10 ml acetic acid, 10 ml distilled water and 70 ml ethanol for 3-5 s [8][9][10][11][12]. So that sample turns light brown and washed with running distilled water and dried.…”

Section: Optical Microscopementioning

confidence: 99%

Effect of ECAE Die Angle on Microstructure Mechanical Properties and Corrosion Behavior of AZ80/91 Magnesium Alloys

Naik¹,

Bandadka²,

Manjaiah³

et al. 2022

Magnesium Alloys Structure and Properties

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Magnesium alloys have poor tensile strength, ductility and corrosion resistance properties associated with other engineering materials like aluminum alloys, steels and superalloys etc. Therefore, many researchers worked on equal channel angular pressing of magnesium alloys to improve the mechanical properties and corrosion resistance. In this work, the effect of channel angles on material properties was investigated during equal channel angular pressing of AZ80/91 magnesium alloy using processing route-R at 598 K processing temperature. Channel angles of 900 and 1100, common corner angle of 300 have been considered for the study. It has been revealed that the channel angle has a significant influence on deformation homogeneity, microhardness, ultimate tensile strength, ductility, and corrosion behavior of AZ80/91 magnesium alloys. Specifically, AZ80/91 Mg alloys processed through 900 channel angle i.e. die A is considered as optimal die parameter to improve above-said material properties. Investigation showing concerning as-received AZ80 and AZ91 Mg alloy indicates 11%, 14% improvement of UTS and 69%, 59% enhancement in ductility after processing through 4P through die A (90°) at 598 K respectively. Also, the corrosion rate reduces to 97% and 99% after processing the sample with 4P-ECAP die A (90°) at the same processing temperature for AZ80 and AZ91 Mg alloys respectively. This is mainly due to grain refinement and distribution of Mg17Al12 secondary phase during ECAP.

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The Role of Processing Temperature in Equal Channel Angular Extrusion: Microstructure Mechanical Properties and Corrosion Resistance

Naik

Narendranath

Kumar

2020

Lecture Notes in Mechanical Engineering

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Microstructural and Hardness evolution of AZ80 alloy after ECAP and post-ECAP processes

Cited by 17 publications

References 7 publications

Effect of ECAP process on deformability, microstructure and conductivity of CuCoNi alloy

Effect of ECAP process on deformability, microstructure and conductivity of CuCoNi alloy

Effect of ECAE Die Angle on Microstructure Mechanical Properties and Corrosion Behavior of AZ80/91 Magnesium Alloys

The Role of Processing Temperature in Equal Channel Angular Extrusion: Microstructure Mechanical Properties and Corrosion Resistance

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