circumferential notch

The frac'ture mechanics analysis testing data show that the method of measureing frac'ture toughness of cemented carbide with three-point bend specimen with a breach in mountain shape is reliable.

断裂力学分析及测试数据表明,采用山形缺口三点弯曲试样测定硬质合金断裂韧性的方法是可靠的,数据离散性小,试验可重复性强,并符合硬质合金组织结构—机械性能变化规律。