The role of microstructure and texture in controlling mechanical properties of AZ31B magnesium alloy processed by I-ECAP

Michal Gzyl, Andrzej Rosochowski, Sonia Boczkal, Lech Olejnik

Research output: Contribution to journalArticle

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Abstract

Abstract Mechanical properties of AZ31B magnesium alloy were modified in this work by various processing routes of incremental equal channel angular pressing (I-ECAP) followed by heat treatment. Possible strategies for improving ductility and strength of the alloy were investigated. Processing by routes A and BC showed that texture plays predominant role in controlling mechanical properties at room temperature. Four passes of I-ECAP by route C followed by annealing enhanced ductility up to 0.35 of true strain. It was found that tensile twinning was important in accommodating strain during tensile testing, which resulted in a very good hardening behaviour. The yield strength was improved to 300 MPa by refining grain size to 0.8 µm in I-ECAP at 150 °C. The obtained structure and properties were shown to be stable up to 150 °C. True strain at fracture was increased to 0.2 after annealing at 150 °C without lowering strength.
Original languageEnglish
JournalMaterials Science and Engineering: A
Volume638
Early online date27 Apr 2015
DOIs
Publication statusPublished - 25 Jun 2015

Fingerprint

Equal channel angular pressing
magnesium alloys
pressing
Magnesium alloys
textures
Textures
routes
mechanical properties
ductility
Mechanical properties
microstructure
Microstructure
Ductility
Annealing
annealing
Twinning
Tensile testing
refining
yield strength
twinning

Keywords

  • magnesium alloys
  • equal channel angular pressing (ECAP)
  • severe plastic deformation (SPD)
  • ultra-fine grained (UFG) material
  • electron backscatter diffraction (EBSD)

Cite this

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title = "The role of microstructure and texture in controlling mechanical properties of AZ31B magnesium alloy processed by I-ECAP",
abstract = "Abstract Mechanical properties of AZ31B magnesium alloy were modified in this work by various processing routes of incremental equal channel angular pressing (I-ECAP) followed by heat treatment. Possible strategies for improving ductility and strength of the alloy were investigated. Processing by routes A and BC showed that texture plays predominant role in controlling mechanical properties at room temperature. Four passes of I-ECAP by route C followed by annealing enhanced ductility up to 0.35 of true strain. It was found that tensile twinning was important in accommodating strain during tensile testing, which resulted in a very good hardening behaviour. The yield strength was improved to 300 MPa by refining grain size to 0.8 µm in I-ECAP at 150 °C. The obtained structure and properties were shown to be stable up to 150 °C. True strain at fracture was increased to 0.2 after annealing at 150 °C without lowering strength.",
keywords = "magnesium alloys, equal channel angular pressing (ECAP), severe plastic deformation (SPD), ultra-fine grained (UFG) material, electron backscatter diffraction (EBSD)",
author = "Michal Gzyl and Andrzej Rosochowski and Sonia Boczkal and Lech Olejnik",
year = "2015",
month = "6",
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The role of microstructure and texture in controlling mechanical properties of AZ31B magnesium alloy processed by I-ECAP. / Gzyl, Michal; Rosochowski, Andrzej; Boczkal, Sonia; Olejnik, Lech.

In: Materials Science and Engineering: A, Vol. 638, 25.06.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The role of microstructure and texture in controlling mechanical properties of AZ31B magnesium alloy processed by I-ECAP

AU - Gzyl, Michal

AU - Rosochowski, Andrzej

AU - Boczkal, Sonia

AU - Olejnik, Lech

PY - 2015/6/25

Y1 - 2015/6/25

N2 - Abstract Mechanical properties of AZ31B magnesium alloy were modified in this work by various processing routes of incremental equal channel angular pressing (I-ECAP) followed by heat treatment. Possible strategies for improving ductility and strength of the alloy were investigated. Processing by routes A and BC showed that texture plays predominant role in controlling mechanical properties at room temperature. Four passes of I-ECAP by route C followed by annealing enhanced ductility up to 0.35 of true strain. It was found that tensile twinning was important in accommodating strain during tensile testing, which resulted in a very good hardening behaviour. The yield strength was improved to 300 MPa by refining grain size to 0.8 µm in I-ECAP at 150 °C. The obtained structure and properties were shown to be stable up to 150 °C. True strain at fracture was increased to 0.2 after annealing at 150 °C without lowering strength.

AB - Abstract Mechanical properties of AZ31B magnesium alloy were modified in this work by various processing routes of incremental equal channel angular pressing (I-ECAP) followed by heat treatment. Possible strategies for improving ductility and strength of the alloy were investigated. Processing by routes A and BC showed that texture plays predominant role in controlling mechanical properties at room temperature. Four passes of I-ECAP by route C followed by annealing enhanced ductility up to 0.35 of true strain. It was found that tensile twinning was important in accommodating strain during tensile testing, which resulted in a very good hardening behaviour. The yield strength was improved to 300 MPa by refining grain size to 0.8 µm in I-ECAP at 150 °C. The obtained structure and properties were shown to be stable up to 150 °C. True strain at fracture was increased to 0.2 after annealing at 150 °C without lowering strength.

KW - magnesium alloys

KW - equal channel angular pressing (ECAP)

KW - severe plastic deformation (SPD)

KW - ultra-fine grained (UFG) material

KW - electron backscatter diffraction (EBSD)

UR - http://www.sciencedirect.com/science/journal/09215093

U2 - 10.1016/j.msea.2015.04.055

DO - 10.1016/j.msea.2015.04.055

M3 - Article

VL - 638

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

ER -