JOM

, Volume 70, Issue 5, pp 706–713 | Cite as

On the Importance of Adiabatic Heating on Deformation Behavior of Medium-Manganese Sheet Steels

  • Radhakanta Rana
  • Emmanuel De Moor
  • John G. Speer
  • David K. Matlock
Characterization of Advanced High Strength Steels for Automobiles
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Abstract

The effects of adiabatic heating during deformation of a medium-manganese transformation-induced plasticity steel containing 10.1Mn-1.68Al-0.14C-0.2Si (wt.%) processed with initially 57 vol.% retained austenite were investigated over the temperature range from − 60°C to 100°C at strain rates from 0.002 s−1 to 0.2 s−1. Tensile tests were performed on specimens immersed in isothermal baths, which reduced but did not completely eliminate adiabatic heating. The specimen temperature depended on the extent of adiabatic heating, which increased with strain and strain rate. The measured properties primarily reflected the effects of temperature on austenite stability and the corresponding resistance of austenite transformation to martensite with strain. Changes in austenite stability were monitored by measurements of austenite fractions at a specific strain and observation of microstructures after deformation. The results of this study provide a basis to identify input material parameters required for numerical models applicable to sheet metal forming of medium-Mn steels.

Notes

Acknowledgement

The authors acknowledge support of the corporate sponsors of the Advanced Steel Processing and Products Research Center at the Colorado School of Mines. This material is based upon work supported by the Department of Energy National Energy Technology Laboratory under Award No. DE-EE0005976. This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Radhakanta Rana
    • 1
    • 2
  • Emmanuel De Moor
    • 1
  • John G. Speer
    • 1
  • David K. Matlock
    • 1
  1. 1.Advanced Steel Processing and Products Research Center (ASPPRC)Colorado School of MinesGoldenUSA
  2. 2.Tata SteelIJmuidenThe Netherlands

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