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用一种新的高温云纹干涉法实验研究镍基合金在高温下的断裂韧性。采用光刻制版技术将高密度正交零厚度光栅直接刻到依在低偏析定向镍基合金单边切口（ＳＥＮ）薄试件表面，试件放置在带石英窗口可传送光信息的加热炉内。此外，为同时获取垂直和水平位移场的云纹条纹图，在光路公安置了Ｕ—Ｖ装置。按实验经扫描及数字化处理后的数据自动提供给计算机进行Ｊ积分并按相应的本构关系计算，最后输出断裂判据Ｊ１ｃ。
Fracture Toughness of Nickel Base Alloy at Elevated Temperature by a New High Temperature Moiré Interferometry. Using lithography plate technology, the high-density Orthogonal zero-thickness grating was inscribed directly on the surface of a thin specimen with low segregation oriented nickel-base alloy single-side incision (SEN), and the specimen was placed in a furnace with a quartz window to transmit optical information . In addition, U-V devices were installed in the optical path in order to obtain moire fringe patterns for vertical and horizontal displacement fields simultaneously. According to the experiment, the scanned and digitized data are automatically provided to the computer for J-point integration and calculated according to the corresponding constitutive relationship. Finally, the fracture criterion J1c is output.