摘要
将断裂韧性测试的压痕方法与压痕弯曲方法相结合，独立地分离出了压痕残余应力因子ｘ，使其成为可测参量，并建立了压痕一压痕弯曲的断裂韧性测试方法．将这种方法应用于一种可切削玻璃陶瓷的测试，获得的Ｋ１ｃ值为Ｋ１ｃ＝２．０３ＭＰａ·ｍ１／２，与单边切口法（ＳＥＮＢ）获得的Ｋ１ｃ值有较好的一致性．测得的残余应力因子Ｘ＝０．０９３，符合Ａｎｓｔｉｓ经验公式的预测．
As combined of vickers indentstion ted method with indentation-bend strength test mathed, a new method (IIB) for measuring fracture toughness was developed. Both toughness Kc and residual-stress factor x can be independently determined. This method was applied to a Mchinable barium-mica-containing glass-ceramic. The fracture toughness K1c=2.03MPa·m1/2 from IIB method was much the same as that from SENB method. The residual stress factor X=0.093 for the machindble glass-ceramic, was basically agreed with that from Anstis' experience formula.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第2期169-174,共6页
Journal of Inorganic Materials
关键词
断裂韧性
残余应力因子
玻璃陶瓷
切削
vickers indentation, fracture toughness, residual-stress factor, glass-ceramic
