【摘要】 研究压痕径向裂纹在压痕塑性区残余应力作用下的扩展特性，分别测定一种可切削玻璃陶瓷在水、空气中的应力腐蚀指数ｎ．结果表明：水显著加速裂纹扩展，使Ｖ～ＫＩ曲线左移，ｎ值下降。更多还原

【Abstract】 In this paper,growth behavior of indentation radial crack under the residual stress driving force from indentation plastic Zone is studied.The stress corrosion exponent of a machinable glass ceramic is measured in water and air.The results show that,water enhance crack growth velocity,makes V～K I curve move left and gives a smaller n value.更多还原