Predicting the Warm Forming Behavior of WE43 and AA5086 Alloys

I. Kapoor, R.G. Narayanan, S. Taylor, Vit Janik, Richard Dashwood

Research output: Contribution to journalConference article

2 Citations (Scopus)
33 Downloads (Pure)

Abstract

In the present work, we have studied the formability behaviour of two types of magnesium alloys, WE43 hot rolled and WE43 cold rolled by carrying out uniaxial tensile test at elevated temperatures of 350 °C to 500 °C both experimentally and numerically at a constant strain rate of 10-3s-1. Finite element (FE) model is simulated in ABAQUS/CAE 6.7-6 using coupled temperature-displacement step at higher temperature considering material's property to be isotropic in nature. The effect of temperature on maximum flow stress and major strain at onset of necking is discussed. The true stress-strain behaviour and necking evolution through strain mapping are predicted from FE model and compared with the experimental results. The results show that with increase in temperature, the maximum flow stress decreases and necking delays with increase in limiting major strain for the Magnesium alloys. The work has been extended to predict the forming limit strains of Al 5086 alloy only on the negative minor strain region using M-K (Marciniak and Kuczynski) concept. An FE model based on M-K concept is simulated at 20 °C, 150 °C and 200 °C using coupled temperature-displacement step considering anisotropic sheet material. A groove is created in the middle of the model with an optimizedf value of 0.99, after much iteration. The forming limit strains from such FE simulations are compared with the available experimental data. The results are encouraging providing scope for further improvements in modelling.
Original languageEnglish
Pages (from-to)897-904
Number of pages8
JournalProcedia Engineering
Volume173
Early online date22 Feb 2017
DOIs
Publication statusPublished - 1 Mar 2017
Event11th International Symposium on Plasticity and Impact Mechanics - New Delhi, India
Duration: 11 Dec 201614 Dec 2016
Conference number: 11

Bibliographical note

This paper was given at the 11th International Symposium on Plasticity and Impact Mechanics, Implast 2016, New Delhi, 11-14 December 2016
Under a creative commons license (CC BY-NC-ND 4.0)

Keywords

  • Magnesium alloys
  • Warm sheet forming
  • Tensile test
  • Formability
  • Necking

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