Thursday, March 20, 2008 - 8:50 AM
Convention Center, Second Level, 210 (Ernest N. Morial Convention Center)
08591

Effect of Metallurgical Factors on PWSCC Growth Rate of Ni Based Alloys

Nobuo Totsuka, Takumi Terachi, and Takuyo Yamada, Inst of Nuclear Safety Sys Inc; Masayoshi Ozawa, Japan Nuclear Energy Safety; Kiyotomo Nakata, Japan Nuclear Energy Safety Organization

ABSTRACT

It is known that Ni based alloy suffered SCC in primary water of PWR.  It has been clarified that the SCC crack growth rate of weld metal is faster than that of base metal of alloy 600(UNS N06600) and the SCC cracks hardly propagate in both weld and base metal of alloy 690(UNS N06690).  In this study, four base metals and two weld metals of alloy 600 and one base metal and two weld metals of alloy 690 have been examined to clarify the metallurgical factors which affect on the SCC propagation behavior.

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