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Effects of Microstructure on the Strain Rate Sensitivity of Advanced Steels

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TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

The dependence of the strain rate sensitivity of advanced ~1 GPa tensile strength steels on the phases present in their microstructures was studied by testing different steels at 0.005 and 500 s−1. The high strain rate tests were performed using a Kolsky bar setup, while the quasi-static tests were performed using a universal testing machine. The two main steels of interest were the Ferrite-Martensite DP980 and the Ferrite-Martensite-Austenite QP980; the latter being a transformation induced plasticity (TRIP) assisted steel. For comparison, ferritic CR5 mild steel and austenitic stainless steel 201 were also tested under the same conditions. Though the differences in the steel chemistries were not taken into account, the results obtained here suggest a strong relationship between the phase-content of the steel and its response to the changes in the loading rate. The relationships between the observed mechanical behavior and the phases present in the microstructure are discussed.

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Acknowledgements

The authors greatly acknowledge the support of the Department of Energy, for funding this work. The support of General Motors, ThyssenKrupp Steel and AK Steel for supplying the materials used in this work is also acknowledged.

This material is based upon work supported by the Department of Energy under Cooperative Agreement Number DE-EE0005976, with United States Automotive Materials Partnership LLC (USAMP). 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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Authors and Affiliations

  1. Clemson University – International Center for Automotive Research (CU-ICAR), Greenville, SC, USA

    Rakan Alturk, Zeren Xu & Fadi Abu-Farha

  2. National Institute for Standards and Technology, Gaithersburg, MD, USA

    Steven Mates

Authors
  1. Rakan Alturk
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  2. Steven Mates
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  3. Zeren Xu
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  4. Fadi Abu-Farha
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Corresponding authors

Correspondence to Rakan Alturk or Fadi Abu-Farha .

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  1. Pittsburgh, Pennsylvania, USA

    The Minerals, Metals & Materials Society TMS

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Alturk, R., Mates, S., Xu, Z., Abu-Farha, F. (2017). Effects of Microstructure on the Strain Rate Sensitivity of Advanced Steels. In: TMS, T. (eds) TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51493-2_24

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