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测定了结构弛豫阶段退火温度ＴＲ对非晶态Ｆｅ４６Ｎｉ３２Ｖ２Ｓｉ１４ Ｂ６合金条带室温断裂韧性（Ｋｃ）的影响．ＴＲ小于２００℃时，ＫＣ大致不变，平均值约８ＭＰａｍ１／２；随着ＴＲ由２００℃增加至３５０℃，ＫＣ值逐渐下降至２ＭＰａｍ１／２；相应地断裂剖面形貌由不规则特征（分形的）逐渐变为平直的或光滑的特征．用垂直截面法测定断裂剖面裂纹轮廓线的分形维数Ｄｆ．实验结果表明，在准二维脆性断裂条件下，Ｋｃ值与分形维数增量的平方根成正比，并讨论不同结构弛豫阶段断裂特征长度ａｃ与断裂机制
The effect of annealing temperature TR on the room temperature fracture toughness (Kc) of amorphous Fe46Ni32V2Si14B6 alloy strip was measured. When TR is less than 200 ℃, KC is approximately constant and the average value is about 8MPam1 / 2. With the increase of TR from 200 ℃ to 350 ℃, the KC value gradually decreases to 2MPam1 / 2. Correspondingly, the fracture surface morphology is characterized by irregular features ) Gradually become flat or smooth features. The Fractal Dimension Df of Fracture Profile in Fracture Profile Measured by Vertical Section Method. The experimental results show that under the condition of quasi-two-dimensional brittle fracture, the Kc value is proportional to the square root of the increment of fractal dimension, and the fracture characteristic length ac and fracture mechanism