Yield asymmetry design of magnesium alloys by integrated computational materials engineering

Dongsheng Li, Vineet Joshi, Curt Lavender, Mohammad Khaleel, Said Ahzi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Deformation asymmetry of magnesium alloys is an important factor on machine design in the automobile industry. Represented by the ratio of compressive yield stress (CYS) against tensile yield stress (TYS), deformation asymmetry is strongly related to texture and grain size. A polycrystalline viscoplasticity model, modified intermediate φ-model, is used to predict the deformation behavior of magnesium alloys with different grain sizes. Validated with experimental results, integrated computational materials engineering is applied to find out the route in achieving desired asymmetry via thermomechanical processing. For example, CYS/TYS in rolled texture is smaller than 1 under different loading directions. In other textures, such as extruded texture, CYS/TYS is large along the normal direction. Starting from rolled texture, asymmetry will increase to close to 1 along the rolling direction after being compressed to a strain of 0.2. Our modified φ-model also shows that grain refinement increases CYS/TYS. Along with texture control, grain refinement also can optimize the yield asymmetry. After the grain size decreases to a critical value, CYS/TYS reaches to 1 because CYS increases much faster than TYS. By tailoring the microstructure using texture control and grain refinement, it is achievable to optimize yield asymmetry in wrought magnesium alloys.

Original languageEnglish
Pages (from-to)448-455
Number of pages8
JournalComputational Materials Science
Volume79
DOIs
Publication statusPublished - 5 Aug 2013

Fingerprint

Magnesium Alloy
Yield Stress
magnesium alloys
Magnesium alloys
Asymmetry
Yield stress
asymmetry
engineering
Engineering
Texture
Textures
textures
tensile stress
Grain refinement
Grain Size
Refinement
grain size
Design
Optimise
Viscoplasticity

Keywords

  • Grain refinement
  • Integrated computational materials engineering φ-Model
  • Magnesium
  • Yield asymmetry

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)
  • Computer Science(all)
  • Physics and Astronomy(all)
  • Computational Mathematics
  • Mechanics of Materials

Cite this

Yield asymmetry design of magnesium alloys by integrated computational materials engineering. / Li, Dongsheng; Joshi, Vineet; Lavender, Curt; Khaleel, Mohammad; Ahzi, Said.

In: Computational Materials Science, Vol. 79, 05.08.2013, p. 448-455.

Research output: Contribution to journalArticle

Li, Dongsheng ; Joshi, Vineet ; Lavender, Curt ; Khaleel, Mohammad ; Ahzi, Said. / Yield asymmetry design of magnesium alloys by integrated computational materials engineering. In: Computational Materials Science. 2013 ; Vol. 79. pp. 448-455.
@article{65605a99bce143b58907d06efe6e4205,
title = "Yield asymmetry design of magnesium alloys by integrated computational materials engineering",
abstract = "Deformation asymmetry of magnesium alloys is an important factor on machine design in the automobile industry. Represented by the ratio of compressive yield stress (CYS) against tensile yield stress (TYS), deformation asymmetry is strongly related to texture and grain size. A polycrystalline viscoplasticity model, modified intermediate φ-model, is used to predict the deformation behavior of magnesium alloys with different grain sizes. Validated with experimental results, integrated computational materials engineering is applied to find out the route in achieving desired asymmetry via thermomechanical processing. For example, CYS/TYS in rolled texture is smaller than 1 under different loading directions. In other textures, such as extruded texture, CYS/TYS is large along the normal direction. Starting from rolled texture, asymmetry will increase to close to 1 along the rolling direction after being compressed to a strain of 0.2. Our modified φ-model also shows that grain refinement increases CYS/TYS. Along with texture control, grain refinement also can optimize the yield asymmetry. After the grain size decreases to a critical value, CYS/TYS reaches to 1 because CYS increases much faster than TYS. By tailoring the microstructure using texture control and grain refinement, it is achievable to optimize yield asymmetry in wrought magnesium alloys.",
keywords = "Grain refinement, Integrated computational materials engineering φ-Model, Magnesium, Yield asymmetry",
author = "Dongsheng Li and Vineet Joshi and Curt Lavender and Mohammad Khaleel and Said Ahzi",
year = "2013",
month = "8",
day = "5",
doi = "10.1016/j.commatsci.2013.06.045",
language = "English",
volume = "79",
pages = "448--455",
journal = "Computational Materials Science",
issn = "0927-0256",
publisher = "Elsevier",

}

TY - JOUR

T1 - Yield asymmetry design of magnesium alloys by integrated computational materials engineering

AU - Li, Dongsheng

AU - Joshi, Vineet

AU - Lavender, Curt

AU - Khaleel, Mohammad

AU - Ahzi, Said

PY - 2013/8/5

Y1 - 2013/8/5

N2 - Deformation asymmetry of magnesium alloys is an important factor on machine design in the automobile industry. Represented by the ratio of compressive yield stress (CYS) against tensile yield stress (TYS), deformation asymmetry is strongly related to texture and grain size. A polycrystalline viscoplasticity model, modified intermediate φ-model, is used to predict the deformation behavior of magnesium alloys with different grain sizes. Validated with experimental results, integrated computational materials engineering is applied to find out the route in achieving desired asymmetry via thermomechanical processing. For example, CYS/TYS in rolled texture is smaller than 1 under different loading directions. In other textures, such as extruded texture, CYS/TYS is large along the normal direction. Starting from rolled texture, asymmetry will increase to close to 1 along the rolling direction after being compressed to a strain of 0.2. Our modified φ-model also shows that grain refinement increases CYS/TYS. Along with texture control, grain refinement also can optimize the yield asymmetry. After the grain size decreases to a critical value, CYS/TYS reaches to 1 because CYS increases much faster than TYS. By tailoring the microstructure using texture control and grain refinement, it is achievable to optimize yield asymmetry in wrought magnesium alloys.

AB - Deformation asymmetry of magnesium alloys is an important factor on machine design in the automobile industry. Represented by the ratio of compressive yield stress (CYS) against tensile yield stress (TYS), deformation asymmetry is strongly related to texture and grain size. A polycrystalline viscoplasticity model, modified intermediate φ-model, is used to predict the deformation behavior of magnesium alloys with different grain sizes. Validated with experimental results, integrated computational materials engineering is applied to find out the route in achieving desired asymmetry via thermomechanical processing. For example, CYS/TYS in rolled texture is smaller than 1 under different loading directions. In other textures, such as extruded texture, CYS/TYS is large along the normal direction. Starting from rolled texture, asymmetry will increase to close to 1 along the rolling direction after being compressed to a strain of 0.2. Our modified φ-model also shows that grain refinement increases CYS/TYS. Along with texture control, grain refinement also can optimize the yield asymmetry. After the grain size decreases to a critical value, CYS/TYS reaches to 1 because CYS increases much faster than TYS. By tailoring the microstructure using texture control and grain refinement, it is achievable to optimize yield asymmetry in wrought magnesium alloys.

KW - Grain refinement

KW - Integrated computational materials engineering φ-Model

KW - Magnesium

KW - Yield asymmetry

UR - http://www.scopus.com/inward/record.url?scp=84880887211&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880887211&partnerID=8YFLogxK

U2 - 10.1016/j.commatsci.2013.06.045

DO - 10.1016/j.commatsci.2013.06.045

M3 - Article

AN - SCOPUS:84880887211

VL - 79

SP - 448

EP - 455

JO - Computational Materials Science

JF - Computational Materials Science

SN - 0927-0256

ER -