The purpose of this study is to investigate the following items focused on the microstructure near the fusion boundary of dissimilar weld joint with Ni-based weld metal and low alloy steel; (1) Microstructural characteristics near the fusion boundary, (2) Dominant factor that makes crack retardation near the fusion boundary. Main conclusions can be summarized as follows; (1) From the results of CBB tests, it has been understood that the low alloy s teel has no SCC susceptibility and that there is a differ...
英字タイトル:
SCC propagation and cessation behavior near the fusion boundary of dissimilar weld jointwith Ni-based weld metal and low alloy steel

SCC behavior near the fusion boundary of dissimilar weld joint with Ni-based weld metal and low alloy steel in high temperature water has been investigated with special attention on relation t o the characteristics of microstructure. From the results of CBB test (1.0 ppm-Na2SO4 and 8 ppm dissolved oxygen), it has been obvious that the LAS has no SCC susceptibility. On the other hand, Alloy182 in the weld samples have SCC susceptibility. Most of crack tips have located at the fusion boundary, and the penetr...
英字タイトル:
Characteristics of microstructure and SCC behavior near the fusion boundaryof Ni-base weld metal and low alloy steel