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 tha...
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