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The fracture behaviour of two Co-Mo-Cr-Si wear resistant alloys (“Tribaloys”)
Authors:Alison Halstead  Rees D. Rawlings
Affiliation:(1) Department of Metallurgy and Materials Science, Imperial College, Prince Consort Road, SW7 2BP London, UK;(2) Present address: Department of Materials Technology, Brunel University, Kingston Lane, Uxbridge, Middlesex, UK
Abstract:The room temperature modulus of rupture (MOR) and the plane strain fracture toughness (KIC) of two Co-Mo-Cr-Si wear resistant alloys in various microstructure conditions have been determined. The modulus of rupture varied from 304 to 927 MN m–2 and as such was more structure sensitive thanKIC, which was in the range 15 to 26 MN m–3/2 for all conditions of the alloys. The best combination of room-temperature properties was associated with an f c c solid solution whereas h c p solid solution with a Widmanstätten precipitate produced the poorest properties. The industrial significance of these results are discussed.
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