Crystal plasticity modeling of the slip systems activity in Mg alloys at higher temperatures

Mohsen Shahi, James Nemes

Research output: Contribution to conferencePaper

Abstract

Understanding the role of the slip systems and their evolution with temperature is critical to the correct simulation of the mechanical behavior of magnesium alloys. In this paper, relations are proposed for evolution of the CRSS values of different slip systems and strain-rate sensitivity factor, stating them as functions of temperature and strain-rate. These relations are used in conjunction with the Crystal Plasticity Finite Element (CPFE) model for prediction of stress-strain curves and r-values at elevated temperatures (75°C to 250°C). The new relations can predict the decrease in stress level, the anisotropy of the material, and the decrease in the difference between the r-values in the RD and the TD with the increase in temperature. The results confirm the trends predicted with Taylor-type and VPSC models. In particular, they confirm the high activity of the <c+a> slip systems at higher temperatures.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 2007
Event2007 World Congress - Detroit, MI, United States
Duration: Apr 16 2007Apr 19 2007

Other

Other2007 World Congress
CountryUnited States
CityDetroit, MI
Period4/16/074/19/07

Fingerprint

Plasticity
Crystals
Strain rate
Temperature
Stress-strain curves
Magnesium alloys
Anisotropy

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Shahi, Mohsen ; Nemes, James. / Crystal plasticity modeling of the slip systems activity in Mg alloys at higher temperatures. Paper presented at 2007 World Congress, Detroit, MI, United States.
@conference{d367c33a2e87417390e9e7407293b36b,
title = "Crystal plasticity modeling of the slip systems activity in Mg alloys at higher temperatures",
abstract = "Understanding the role of the slip systems and their evolution with temperature is critical to the correct simulation of the mechanical behavior of magnesium alloys. In this paper, relations are proposed for evolution of the CRSS values of different slip systems and strain-rate sensitivity factor, stating them as functions of temperature and strain-rate. These relations are used in conjunction with the Crystal Plasticity Finite Element (CPFE) model for prediction of stress-strain curves and r-values at elevated temperatures (75°C to 250°C). The new relations can predict the decrease in stress level, the anisotropy of the material, and the decrease in the difference between the r-values in the RD and the TD with the increase in temperature. The results confirm the trends predicted with Taylor-type and VPSC models. In particular, they confirm the high activity of the slip systems at higher temperatures.",
author = "Mohsen Shahi and James Nemes",
year = "2007",
month = "12",
day = "1",
doi = "10.4271/2007-01-1030",
language = "English (US)",
note = "2007 World Congress ; Conference date: 16-04-2007 Through 19-04-2007",

}

Shahi, M & Nemes, J 2007, 'Crystal plasticity modeling of the slip systems activity in Mg alloys at higher temperatures' Paper presented at 2007 World Congress, Detroit, MI, United States, 4/16/07 - 4/19/07, . https://doi.org/10.4271/2007-01-1030

Crystal plasticity modeling of the slip systems activity in Mg alloys at higher temperatures. / Shahi, Mohsen; Nemes, James.

2007. Paper presented at 2007 World Congress, Detroit, MI, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Crystal plasticity modeling of the slip systems activity in Mg alloys at higher temperatures

AU - Shahi, Mohsen

AU - Nemes, James

PY - 2007/12/1

Y1 - 2007/12/1

N2 - Understanding the role of the slip systems and their evolution with temperature is critical to the correct simulation of the mechanical behavior of magnesium alloys. In this paper, relations are proposed for evolution of the CRSS values of different slip systems and strain-rate sensitivity factor, stating them as functions of temperature and strain-rate. These relations are used in conjunction with the Crystal Plasticity Finite Element (CPFE) model for prediction of stress-strain curves and r-values at elevated temperatures (75°C to 250°C). The new relations can predict the decrease in stress level, the anisotropy of the material, and the decrease in the difference between the r-values in the RD and the TD with the increase in temperature. The results confirm the trends predicted with Taylor-type and VPSC models. In particular, they confirm the high activity of the slip systems at higher temperatures.

AB - Understanding the role of the slip systems and their evolution with temperature is critical to the correct simulation of the mechanical behavior of magnesium alloys. In this paper, relations are proposed for evolution of the CRSS values of different slip systems and strain-rate sensitivity factor, stating them as functions of temperature and strain-rate. These relations are used in conjunction with the Crystal Plasticity Finite Element (CPFE) model for prediction of stress-strain curves and r-values at elevated temperatures (75°C to 250°C). The new relations can predict the decrease in stress level, the anisotropy of the material, and the decrease in the difference between the r-values in the RD and the TD with the increase in temperature. The results confirm the trends predicted with Taylor-type and VPSC models. In particular, they confirm the high activity of the slip systems at higher temperatures.

UR - http://www.scopus.com/inward/record.url?scp=84877438282&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877438282&partnerID=8YFLogxK

U2 - 10.4271/2007-01-1030

DO - 10.4271/2007-01-1030

M3 - Paper

ER -