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Alloys of iron-chromium-aluminum-yttrium possess extraordinary oxidation and cyclic oxidation resistance and are attractive for automobile emission control hardware applications. They are, though, less tough than most ferritic stainless steels and care must be exercised in their general handling. Extensive practical use of light-gage strip is possible, however. This paper presents fundamental fracture mechanism observations on an Fe-15.9Cr-4.9Al-0.3Y alloy strip together with a detailed discussion of the fabrication of such Fecralloy strip en route to the manufacture of automobile emission control hardware. The implications for steel strip production practice are discussed and an assessment of light-gage strip fabrication latitude is presented.
toughness, fracture mechanisms, strip fabrication capability, catalytic converter applications, ferritic stainless steels, fracture toughness
Development chemist, Matthey-Bishop Inc., Malvern, Pa.
Rensselaer Polytechnic Institute, Troy, N. Y.