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- W2784528603 abstract "For cemented carbide, classified as a brittle material, very little plastic deformation will occur preceding the initiation of a crack and ultimate failure. It is well known that compressive residual stress (CRS) helps to counteract the inherent brittle nature of cemented carbide. By focusing on rock drill inserts, a new method was used that significantly increase the depth of CRS. WC- Co composites with 11wt% Co and a mean tungsten carbide grain size of 4 micrometers were treated at different accelerations. The hardness, toughness and compressive strength were measured. A significant increase in coercivity (Hc) was recorded in the treated samples which directly related to the kinetic energy applied to the system. In samples exposed to treatment at 40G acceleration, compressive stresses were measured as deep as 6mm. In compressive strength tests, these samples showed an increase of 61% of the compressive strength. These samples have the maximum hardness increase of approximately 100 HV30 close to the treated surface. No Palmqvist cracks could be observed even at HV100. EBSD analysis showed no correlation between the Hc increase and grain refinement due to the treatment process. TEM and XRD revealed a large number of dislocations in the WC phase and Cobalt phase." @default.
- W2784528603 created "2018-02-02" @default.
- W2784528603 creator A5039949961 @default.
- W2784528603 date "2017-12-01" @default.
- W2784528603 modified "2023-09-27" @default.
- W2784528603 title "The effect of compressive residual stresses on the properties of tumbled-processed cemented carbide" @default.
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