THERMAL SHOCK FATIGUE BEHAVIORS OF CEMENTED CARBIDE YG20

来源期刊：中国有色金属学报(英文版)1997年第2期

论文作者：Liu Ning Xu Genying Xu Yudong Li Jian

文章页码：150 - 155

Key words：cemented carbide YG20; thermal shock fatigue; crack formation; microvoid

Abstract: The thermal shock fatigue behaviors of cemented carbide YG20 have been studied. The results show that the formation of thermal shock fatigue cracks is related to nucleation, growth and aggregation of microvoids distributed at the interfaces of WC/Co phases. The incubation period of crack formation decreases and the propagation rate of crack increases with increasing of the cyclic temperature and cooling rate in the cycles. The notch also has the same effect. The SEM examination has also denoted that there are some fatigue striae on the fracture morphologies of fracture surfaces.