Eight tungsten carbide (WC) materials containing different cobalt (Co) contents (3‒12 wt.%) and with different WC grain sizes (.4‒1.85 μm) were subjected to compressive loading under quasi-static and dynamic conditions using a dumbbell-shaped specimen geometry. The materials exhibited varying degrees of inelastic strain prior to final fracture under both loading conditions. Inelastic strain was consistent under dynamic loading but varied with Co content and WC grain size under quasi-static loading. The only material to exhibit a strain-rate-dependent compression strength was the material containing the highest level of Co (12%) and the largest WC grain size (1.85 μm) indicating a potential threshold level of Co content and/or WC grain size where the compressive strength is insensitive to the strain rate.

中文翻译：

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碳化钨-钴硬质合金的抗压强度

使用哑铃在准静态和动态条件下对八种含有不同钴 (Co) 含量 (3-12 wt.%) 和不同 WC 晶粒尺寸 (.4-1.85 μm) 的碳化钨 (WC) 材料进行压缩加载形试样的几何形状。在两种加载条件下，材料在最终断裂之前表现出不同程度的非弹性应变。非弹性应变在动态载荷下是一致的，但在准静态载荷下随 Co 含量和 WC 晶粒尺寸而变化。唯一表现出与应变率相关的抗压强度的材料是含有最高水平 Co (12%) 和最大 WC 晶粒尺寸 (1.85 μm) 的材料，表明 Co 含量和/或 WC 晶粒尺寸的潜在阈值水平其中抗压强度对应变率不敏感。