Recrystallization behavior of tungsten processed by equal channel angular extrusion at low homologues temperature: Microstructure, hardness, and texture

The initial coarse grains of Ti-50.9at%Ni alloy were refined into submicron grains, small than 0.5 um in size, after eight passes Equal Channel Angular Extrusion (ECAE) at 500°C. Optical microscopy and high temperature DSC tests were applied to investigate recrystallization behavior. It is found that the recrystallization start (Rs) and recrystallization peak (Rp) temperatures of Ti-50.9at%Ni specimens processed by eight passes ECAE are lower than that of the samples processed by one pass ECAE. Ti-50.9at%Ni specimens processed by eight passes ECAE with submicron grains are characterized by higher stability and need less energy to finish recrystallization process.

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EBSD Analysis of Deformed and Partially Recrystallized Microstructures in ECAE-Processed Copper

Materials Science Forum ◽

10.4028/www.scientific.net/msf.715-716.825 ◽

2012 ◽

Vol 715-716 ◽

pp. 825-830 ◽

Cited By ~ 2

Author(s):

O.V. Mishin ◽

J.R. Bowen ◽

Andrew Godfrey

Keyword(s):

Uniform Distribution ◽

Room Temperature ◽

Equal Channel Angular Extrusion ◽

Pure Copper ◽

Sample Thickness ◽

Ebsd Analysis ◽

Recrystallization Behavior ◽

Angular Extrusion

The deformed microstructure and recrystallization behavior of copper samples processed using equal channel angular extrusion (ECAE) have been investigated. The heavily deformed microstructure was found to be non-uniform through the sample thickness and to vary in a manner consistent with the non-uniform distribution of strain imposed by processing. The through-thickness heterogeneity of the deformed microstructure resulted in a different extent of recrystallization in different layers during annealing. Recrystallized grains were also observed in samples that were not annealed, but stored at room temperature, which indicates that the deformed microstructure of ECAE-processed pure copper is unstable even at room temperature. In each sample, recrystallization was found to initiate in regions containing predominantly large misorientations.

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Analysis of texture evolution in equal channel angular extrusion of copper using a new flow field

Acta Materialia ◽

10.1016/j.actamat.2003.12.027 ◽

2004 ◽

Vol 52 (7) ◽

pp. 1885-1898 ◽

Cited By ~ 150

Author(s):

László S. Tóth ◽

Roxane Arruffat Massion ◽

Lionel Germain ◽

Seung C. Baik ◽

Satyam Suwas

Keyword(s):

Flow Field ◽

Equal Channel Angular Extrusion ◽

Texture Evolution ◽

Angular Extrusion

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Tube Equal Channel Angular Extrusion (tECAE) of Mg-3Al-1Zn alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2021.141236 ◽

2021 ◽

pp. 141236

Author(s):

Abhinav Srivastava ◽

Matthew W. Vaughan ◽

Bilal Mansoor ◽

Wahaz Nasim ◽

Robert Barber ◽

...

Keyword(s):

Equal Channel Angular Extrusion ◽

Angular Extrusion

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Equal Channel Angular Extrusion of Tubular Aluminum Alloy Specimens—Analysis of Extrusion Pressures and Mechanical Properties

Journal of Manufacturing Processes ◽

10.1016/s1526-6125(06)80006-x ◽

2006 ◽

Vol 8 (2) ◽

pp. 112-120 ◽

Cited By ~ 11

Author(s):

A.V. Nagasekhar ◽

Uday Chakkingal ◽

P. Venugopal

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Equal Channel Angular Extrusion ◽

Angular Extrusion

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Shear induced simultaneous consolidation and alignment of silicon nanowires into ingots using equal channel angular extrusion (ECAE)

Materials Research Express ◽

10.1088/2053-1591/2/1/015013 ◽

2015 ◽

Vol 2 (1) ◽

pp. 015013 ◽

Cited By ~ 2

Author(s):

Venkata Vasiraju ◽

Lance Brockway ◽

Shreyas Balachandran ◽

Arun Srinivasa ◽

Sreeram Vaddiraju

Keyword(s):

Silicon Nanowires ◽

Equal Channel Angular Extrusion ◽

Angular Extrusion

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Mechanical Properties of Equal-Channel Angular Extrusion-Processed Al-20Zn Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.445.195 ◽

2012 ◽

Vol 445 ◽

pp. 195-200

Author(s):

Murat Aydin ◽

Yakup Heyal

Keyword(s):

Mechanical Properties ◽

Impact Toughness ◽

Equal Channel Angular Extrusion ◽

Considerable Change ◽

Fatigue Properties ◽

Dendritic Microstructure ◽

Two Phase ◽

Angular Extrusion ◽

Alloy Increase ◽

The Impact

The mechanical properties mainly tensile properties, impact toughness and high-cycle fatigue properties, of two-phase Al-20Zn alloy subjected to severe plastic deformation (SPD) via equal-channel angular extrusion (ECAE) using route A up to 2 passes were studied. The ECAE almost completely eliminated as-cast dendritic microstructure including casting defects such as micro porosities. A refined microstructure consisting of elongated micro constituents, α and α+η eutectic phases, formed after ECAE via route A. As a result of this microstructural change, mechanical properties mainly the impact toughness and fatigue performance of the as-cast Al-20Zn alloy increased significantly through the ECAE. The rates of increase in fatigue endurance limit are approximately 74 % after one pass and 89 % after two passes while the increase in impact toughness is 122 %. Also the yield and tensile strengths of the alloy increase with ECAE. However, no considerable change occurred in hardness and percentage elongation of the alloy. It was also observed that the ECAE changed the nature of the fatigue fracture characteristics of the as-cast Al-20Zn alloy.

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