Microstructural Evolution and Mechanism of Grain Refinement During Annealing of Cold-Drawn Copper Clad Steel Wires

Multi-pass caliber rolling has proven its vast potential for ultrafine-scale grain refinement and mass production of various metals. Nevertheless, the studies related to Mg alloys have primarily focused only on a few commercial materials, such as AZ31 and ZK60 Mg alloys. This is the first study to investigate caliber-rolled Mg–1Sn (TM10) and Mg–1Sn–1Mn (TM11) alloys. Specifically, this work aims to elucidate the microstructural characteristics of these alloys, including grain refinement, recrystallization, and texture development. Such features were discussed from the viewpoints of alloying effects (i.e., Sn and Mn) and mechanical effects (i.e., caliber-rolling strains). The combination of the addition of Mn and high-redundant strain results in effective grain refinement of the caliber-rolled TM11 Mg alloys. In addition, both TM10 and TM11 Mg alloys exhibit a unique split basal texture, wherein the basal poles are tilted in the plane normal to the rolling direction.

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Microstructural Evolution and Grain Refinement in a Cu-Zr Alloy Processed by High-Pressure Torsion

Materials Science Forum ◽

10.4028/www.scientific.net/msf.783-786.2635 ◽

2014 ◽

Vol 783-786 ◽

pp. 2635-2640 ◽

Cited By ~ 5

Author(s):

Jittraporn Wongsa-Ngam ◽

Terence G. Langdon

Keyword(s):

High Pressure ◽

Grain Refinement ◽

Microstructural Evolution ◽

High Pressure Torsion ◽

Electron Backscatter Diffraction ◽

Grain Morphology ◽

Grain Structure ◽

Ultrafine Grain ◽

Refinement Mechanism ◽

Ultrafine Grain Structure

A copper alloy, Cu-0.1% Zr, was processed at room temperature by high-pressure torsion (HPT) in order to evaluate the microstructural evolution and grain refinement mechanism. Transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD) techniques were employed to measure the grain morphology, grain size distributions and the distribution of the misorientation angles. The results demonstrate that this processing procedure has a potential for producing an ultrafine-grain structure containing reasonably equiaxed grain with high-angle boundary misorientations. The grain refinement mechanism is primarily governed by dislocation activities.

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Effects of the Annealing Temperature and Time on the Microstructural Evolution and corresponding the Mechanical Properties of Cold-Drawn Steel Wires

Metals and Materials International ◽

10.3365/met.mat.2008.02.059 ◽

2008 ◽

Vol 14 (1) ◽

pp. 59-64 ◽

Cited By ~ 21

Author(s):

W. J. Nam

Keyword(s):

Mechanical Properties ◽

Microstructural Evolution ◽

Annealing Temperature ◽

Steel Wires

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Microstructural evolution of copper clad steel bimetallic wire

Materials Science and Engineering A ◽

10.1016/j.msea.2010.12.032 ◽

2011 ◽

Vol 528 (6) ◽

pp. 2974-2981 ◽

Cited By ~ 18

Author(s):

T.T. Sasaki ◽

M. Barkey ◽

G.B. Thompson ◽

Y. Syarif ◽

D. Fox

Keyword(s):

Microstructural Evolution ◽

Clad Steel

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Microstructure Evolution in Magnesium Alloy ZK60 during Cyclic Extrusion and Compression

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1035.259 ◽

2014 ◽

Vol 1035 ◽

pp. 259-262

Author(s):

Fei Han ◽

Hong Wei Liu ◽

Gang Chen

Keyword(s):

Grain Size ◽

Magnesium Alloy ◽

Grain Refinement ◽

Microstructural Evolution ◽

Microstructure Evolution ◽

Extrusion Ratio ◽

Technical Parameters ◽

Average Grain Size ◽

Zk60 Magnesium Alloy ◽

Refinement Effect

The microstructural evolution of of as-cast ZK60 magnesium alloy processed by cyclic extrusion and compression (CEC) were studied, and the effects of technical parameters on microstructural evolution were investigated. The results show that the grains of as-cast ZK60 magnesium alloy were obviously refined and uniformed by CEC, the average grain size was decreased from original 50 ~ 60 μm to about 2 μm when the extrusion ratio was 8 with 8-passes at 350°C, and the refinement effect was increased with the rising of extrusion ratio and passes. The effect of increasing passes on grain refinement was not obvious when it exceeds 8. Nevertheless, it is beneficial for the grain homogenization.

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