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Metals 2018, 8(1), 34; https://doi.org/10.3390/met8010034

Ab Initio-Based Modelling of the Yield Strength in High-Manganese Steels

Steel Institute, RWTH Aachen University, Intzestraße 1, 52072 Aachen, Germany
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Received: 15 November 2017 / Revised: 16 December 2017 / Accepted: 3 January 2018 / Published: 5 January 2018
(This article belongs to the Special Issue First-Principles Approaches to Metals, Alloys, and Metallic Compounds)
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Abstract

An ab initio-based model for the strength increase by short-range ordering of C-Mn-Al clusters has been developed. The model is based on ab initio calculations of ordering energies. The impact of clusters on the yield strength of high-manganese austenitic steels (HMnS) is highly dependent on the configurational structure of the cells that carbon atoms will position themselves as interstitial atoms. The impact of the alloying elements C, Mn, and Al on the potential and actual increase in yield strength is analyzed. A model for the calculation of yield strengths of HMnS is derived that includes the impact of short-range ordering, grain size refinement, and solid solution strengthening. The model is in good agreement with experimental data and performs better than other models that do not include strengthening by short-range ordering. View Full-Text
Keywords: short-range ordering; yield strength; high-manganese steel short-range ordering; yield strength; high-manganese steel
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Sevsek, S.; Bleck, W. Ab Initio-Based Modelling of the Yield Strength in High-Manganese Steels. Metals 2018, 8, 34.

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