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  Effects of Mn additions on microstructure and properties of Fe–TiB2 based high modulus steels

Baron, C., Springer, H., & Raabe, D. (2016). Effects of Mn additions on microstructure and properties of Fe–TiB2 based high modulus steels. Materials and Design, 111, 185-191. doi:10.1016/j.matdes.2016.09.003.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-B28A-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-B28D-7
Genre: Journal Article

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 Creators:
Baron, Christian1, Author              
Springer, Hauke2, Author              
Raabe, Dierk1, Author              
Affiliations:
1Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
2Combinatorial Metallurgy and Processing, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863386              

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Free keywords: Alloy steel; Austenite; Density (specific gravity); Elastic moduli; Eutectics; High strength steel; Manganese; Martensite; Mechanical properties; Microstructure; Steel; Stiffness matrix, Alloy designs; Candidate materials; Matrix microstructure; Mechanical and physical properties; Mechanical performance; Microstructure and properties; Physical and mechanical properties; Structural applications, Steel metallurgy
 Abstract: We studied the effects of Mn additions from 0 to 30 wt. on microstructure, mechanical and physical properties of liquid metallurgy synthesised high modulus steels in hypo- and hyper-eutectic TiB2 concentrations. While Mn has little effect on density, both Young's modulus and mechanical properties were strongly affected by the achieved wide spectrum of matrix microstructures, ranging from ferrite to martensite, reverted austenite, ε-martensite and austenite. Mn additions of 20 and 30 wt. did not translate into enhanced mechanical performance despite the higher inherent ductility of the predominantly austenitic matrix, and instead eliminate the intended weight saving potential by significantly reducing the Young's modulus. Martensitic matrices of Mn concentrations of 10 wt., on the other hand, are favourable for improved matrix/particle co-deformation without sacrificing too much of the composites' stiffness. In hypo-eutectic Fe – TiB2 based steels, mechanical properties on the level of high strength dual phase steels could be achieved (~ 900 MPa UTS and 20 tensile elongation) but with an enhanced Young's modulus of 217 GPa and reduced density of 7460 kg m− 3. These significantly improved physical and mechanical properties render Mn alloyed high modulus steels promising candidate materials for next generation lightweight structural applications. © 2016 Elsevier Ltd

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Language(s): eng - English
 Dates: 2016-12-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.matdes.2016.09.003
BibTex Citekey: Baron2016185
 Degree: -

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Title: Materials and Design
  Other : Materials & Design
  Abbreviation : Mater. Des.
Source Genre: Journal
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Publ. Info: Reigate, Surrey, Eng. : Elsevier
Pages: - Volume / Issue: 111 Sequence Number: - Start / End Page: 185 - 191 Identifier: ISSN: 0264-1275
CoNE: /journals/resource/954926234428