In this section, you can access to the latest technical information related to the FUTURE project topic.

Effect of surface scratch depth on microstructure change and stress corrosion cracking behavior of alloy 690TT steam generator tube

Samples with six different scratch depths were prepared on Alloy 690TT tube, and the scratch induced microstructure change and stress corrosion cracking (SCC) behavior were studied in detail. The scratched area could be divided into four regions based on the microstructure, residual strain and micro-mechanical property. With the increasing of scratch depth, the density of slip steps increased at scratched area. After a 1000?h corrosion test, both the number and the length of cracks increased with the increasing of scratch depth, indicating the increasing of SCC sensitivity. In addition, the plastic accumulation zone had the highest SCC sensitivity.

» Author: Bin Wu, Hongliang Ming, Zhiming Zhang, Fanjiang Meng, Yifeng Li, Jianqiu Wang, En-Hou Han

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