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Cryogenic treatment–driven toughening and relaxation behaviour in WC–Co cemented carbides
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DOI：10.1016/j.ijrmhm.2026.107908.png)
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Abstract
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• Cryogenic treatment (−196 °C, 24 h) studied in three WC–Co grades. • ~9.6% Palmqvist toughness gain only in WC–10Co–0.75Cr₃C₂/VC–0.3Mo₂C. • Toughness enhancement decays over 1–3 weeks of room-temperature relaxation. • Transgranular cracking peaks after cryogenic treatment and decays during relaxation. • XRD shows no bulk CoFCC → CoHCP transformation; effect is binder/interface-localised.
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