کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10142000 | 1646089 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of Ni on the microstructural evolution of high Cu reactor pressure vessel steel welds after thermal ageing for up to 100,000â¯h
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
To understand the contribution of the long term thermal ageing to Reactor Pressure Vessel embrittlement a series of weld materials containing systematic variations of Ni has been thermally aged for times up to 100,000â¯h at 330â¯Â°C and 365â¯Â°C. Microstructural characterisation using Atom Probe Tomography was performed. Thermal ageing produced a high number density of nano-scale Cu-enriched clusters. Ni has a strong influence on Cu precipitation, enhancing the homogeneous nucleation of Cu clusters. The nanometre size Cu clusters have a Ni-Mn-Si rich interface which was found to be wider in steels with higher bulk Ni content. This interface reduces the interfacial energy of the Cu-enriched clusters through a combination of the minimising of unfavourable Fe-Cu bonds and reduction in lattice strain. Matrix Cu levels after ageing for 90,000-100,000â¯h were found to be around 0.06-0.08â¯at%, close to the expected solubility limits for Cu in Fe.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 736, 24 October 2018, Pages 111-119
Journal: Materials Science and Engineering: A - Volume 736, 24 October 2018, Pages 111-119
نویسندگان
Paul D. Styman, Jonathan M. Hyde, Andrew Morley, Keith Wilford, Nick Riddle, George D.W. Smith,