Low-Density Steels: Complex Metallurgy for Automotive Applications
2014 (English)In: JOM: The Member Journal of TMS, ISSN 1047-4838, E-ISSN 1543-1851, Vol. 66, no 9, 1747-1758 p.Article in journal (Refereed) Published
The current aim in the development of third-generation steels for lightweighting automotive applications is to increase strength keeping at least the same formability as current steel concepts. In this philosophy, an optimal concept would be one that brings, in addition, a lower density. For this purpose, low-density steels have been designed with important aluminum additions obtaining density reductions of 8-10% or higher in comparison with low-carbon steels. At the levels required for lightweighting, aluminum introduces complex phenomena in steels. Here, some of the effects of aluminum in phase stability, CALPHAD-type modeling, and microstructure development are described, the latter in relation with mechanical properties. Finally, the potential of two families of lightweight steels for automotive applications is assessed by comparison with a steel currently present in automotive structures.
Place, publisher, year, edition, pages
2014. Vol. 66, no 9, 1747-1758 p.
Al-C System, Mechanical-Properties, Phase-Equilibria, Spinodal Decomposition, Thermodynamic Calculation, Ternary Alloys, Fe System, Aluminum, Carbide, Ferrite
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-154385DOI: 10.1007/s11837-014-1084-yISI: 000341916100032ScopusID: 2-s2.0-84920253175OAI: oai:DiVA.org:kth-154385DiVA: diva2:756970
QC 201410202014-10-202014-10-202015-05-06Bibliographically approved