کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1568396 | 999893 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of δ phase precipitation on the stress corrosion cracking resistance of alloy 718 in PWR primary water Influence of δ phase precipitation on the stress corrosion cracking resistance of alloy 718 in PWR primary water](/preview/png/1568396.png)
The negative influence of δ phase on the intergranular stress corrosion cracking (IGSCC) resistance of alloy 718 is commonly taken for granted. In addition, δ phase formed at low temperature (about 1023 K) do not present the same characteristics than the one formed at higher temperatures (from 1173 to 1273 K). The aim of the present study is then to understand how δ phase precipitation could enhance crack initiation in alloy 718, whatever the form of δ phase is. For that purpose, several heat treatments leading to δ phase precipitation were realized on two alloy 718 heats, one sensitive to IGSCC and the second not. Specific slow strain rate tensile tests carried out on thin tensile specimens in simulated PWR primary medium at 633 K conclusively prove that δ phase has no effect on the intrinsic sensitivity to intergranular crack initiation of tested heats.
Journal: Journal of Nuclear Materials - Volume 382, Issue 1, 30 November 2008, Pages 70–75