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| INITIATION OF MICROCRACKS IN WC-Co ALLOYS |
| by SONG Shihong; LI Jianchun (Central-South University of Technology) (Manuscript received 10 December 1985; revised manuscript 14 June; 1986) |
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Cite this article:
by SONG Shihong; LI Jianchun (Central-South University of Technology) (Manuscript received 10 December 1985; revised manuscript 14 June; 1986). INITIATION OF MICROCRACKS IN WC-Co ALLOYS. Acta Metall Sin, 1987, 23(6): 521-526.
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Abstract The initiation of microcracks and its connection with microstructure of WC-Co hardmetals have been studied by STEM. The microcracks in specimens are induced by high-frequency compressive fatigue. The causes of microcrack initiation are explained by traverse of slipping dislocations across sub-grain and WC/WC grain boundaries and the pile-up of dislocations near the boundaries. The reduction of substructure dimension is required to improve the alloy quality.
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Received: 18 June 1987
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