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Mechanical Properties and Magnetism: Stainless Steel Alloys from First-principles Theory

Published online by Cambridge University Press:  27 September 2011

L. Vitos ,
H. L. Zhang ,
N. Al-Zoubi ,
S. Lu ,
J.-O. Nilsson ,
S. Hertzman  and
B. Johansson
L. Vitos
Affiliation:
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden Division for Materials Theory, Department of Physics and Materials Science, Uppsala University, S-75120 Uppsala, Sweden Research Institute for Solid State Physics and Optics, P.O.Box 49, H-1525 Budapest, Hungary
H. L. Zhang
Affiliation:
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
N. Al-Zoubi
Affiliation:
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
S. Lu
Affiliation:
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
J.-O. Nilsson
Affiliation:
AB Sandvik Materials Technology, SE-811 81 Sandviken, Sweden
S. Hertzman
Affiliation:
Outokumpu Stainless Research Foundation, Royal Institute of Technology, Stockholm SE-100 44, Sweden
B. Johansson
Affiliation:
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden Division for Materials Theory, Department of Physics and Materials Science, Uppsala University, S-75120 Uppsala, Sweden
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Abstract

Stainless steels are among the most important engineering materials, finding their principal scope in industry, specifically in cutlery, food production, storage, architecture, medical equipment, etc. Austenitic stainless steels form the largest sub-category of stainless steels having as the main building blocks the paramagnetic substitutional disordered Fe-Cr-Ni-based alloys. Because of that, austenitic steels represent the primary choice for non-magnetic engineering materials. The presence of the chemical and magnetic disorder hindered any previous attempt to calculate the fundamental electronic, structural and mechanical properties of austenitic stainless steels from first-principles theories. Our ability to reach an ab initio atomistic level approach in this exciting field has become possible by the Exact Muffin-Tin Orbitals (EMTO) method. This method, in combination with the coherent potential approximation, has proved an accurate tool in the description of the concentrated random alloys. Using the EMTO method, we presented an insight to the electronic and magnetic structure, and micromechanical properties of austenitic stainless steel alloys. In the present contribution, we will discuss the role of magnetism on the stacking fault energies and elastic properties of paramagnetic Fe-based alloys.

Keywords

magnetic propertieselastic propertiessteel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1296: Symposium O – New Methods in Steel Design—Steel Ab Initio , 2011 , mrsf10-1296-o02-01
Copyright
Copyright © Materials Research Society 2011

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