Stainless steels, which are well known for their excellent corrosion resistance, also exhibit a combination of outstanding characteristics which make them particularly attractive in the automotive field. The strong strain hardening of the austenitic stainless steels (Fe-CR-Ni-(N) alloys) make them very well suited to produce high strengths by cold working. By adapting the degree of cold working, the change in ductility as well as in strength can be optimised for subsequent forming operations such as deep drawing, stretching, bending and roll forming. In most automotive applications, the combination of strength and formability is decisive; in other words, the ideal condition is a combination of strength and high ductility of stainless steels. In the intense competition between different structural materials, stainless steels exhibit properties that meet the very stringent requirements for crash energy management and pedestrian safety. These requirements based on large elongation percentages (ductility) linked to high strain rate sensitivities and high strength properties are typical of high strength stainless steels. It is these characteristics along with the other significant advantages with respect to corrosion resistance, fatigue resistance and ease of fabrication which make stainless steels ideal candidates for application in the field of crashworthy in passenger car structures.The article outlines the following issues: basic properties of stainless steel (corrosion resistance, resistance to pitting, crevice and galvanic corrosion); mechanical properties of stainless steels (response to cold work, material properties for structural design); crashworthiness; energy absorption (strain rate properties, energy absorption performance, energy absorbers).
A new structural material for passenger cars: stainless steel
Ein neuer Werkstoff für tragende Anwendungen im PKW-Bau: Nichtrostender Stahl
2001
16 Seiten, 2 Bilder, 8 Tabellen, 3 Quellen
Conference paper
English
A new structural material for passenger cars: stainless steel
Automotive engineering | 2001
|A new structural material for passenger cars: stainless steel
Automotive engineering | 2002
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