... left to right) After the interlaminar fracture toughness tests, the fracture surfaces were examined by scanning electron microscopy (SEM) to identify the fracture characteristics. The fracture surface of DCB specimen tested at 4 K is shown in Fig. 15 . The dominant failure mode is fiber∕matrix...

... Interfaces ,” Acta Metall. , 37 , pp. 909 – 916 . fracture toughness testing fracture toughness interface phenomena thermal barrier coatings austenitic stainless steel plasma arc sprayed coatings porosity crack-edge stress field analysis ultrasonic materials testing crack detection voids...

... capacity of 10 kN, operates within a vacuum-insulated dewar. A schematic of the test facility is shown in Fig. 2 . The Mode I interlaminar fracture toughness tests were conducted at room, liquid nitrogen and liquid helium temperatures. Low temperature environments were achieved by immersing the loading...

.... G., Sha, G. T., Kohm, R. F., and Bucci, R. J., 1976, “Notch-Yield Ratio as a Quality Control Index for Plane-Strain Fracture Toughness,” ASTM STP, No. 601, pp. 169–190. austenitic stainless steel nickel alloys chromium alloys molybdenum alloys fracture toughness testing notch testing...