Abstract：The hot-pressing diffusion bonding metallurgy was applied in the preparation study of ultrasonic simulation test blocks. Some rectangular defect array blocks containing different depths and widths were designed and prepared for the characterization studies. The axial deformation limit conditions of three test blocks with a gradient from 3 mm to 1 mm were realized using graphite limiting device to implement the hot-pressing diffusion bonding tests. The analysis results of the prepared test blocks showed that: the connection quality of the test blocks was good under all three deformation limit conditions, and the axial and radial deformations were restricted to different degrees. The defects of series with design depths of 2.0 mm, 1.0 mm and 0.5 mm could be retained, and the defects would not fuse when the width/depth ratio of the prefabricated defects was less than 3.6. The most completed prefabricated defect conditions could be obtained at deformation limit of 1 mm. The nondestructive testing results showed that the prefabricated rectangular defect of the test block had a clear boundary under various deformation conditions. The microstructure morphology indicated that the diffusion and fusion of the bonding interface area were sufficient, and there was no self-generated harmful defect that obviously affected the prefabricated defect. There was no obvious difference in metallographic structure between the bonding interface area and the substrate, and the distribution of chemical elements was uniform. The method of hot-pressing diffusion bonding metallurgy could be applied for the development of nondestructive testing simulation test blocks.
张亮, 唐凌天, 王海舟. 扩散连接冶金技术制备无损检测模拟试块的应用研究[J]. 冶金分析, 2022, 42(8): 20-28.
ZHANG Liang, TANG Lingtian, WANG Haizhou. Application study on the preparation of nondestructive testing simulated test blocks by diffusion bonding metallurgy. , 2022, 42(8): 20-28.
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