کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9793692 | 1514277 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved cavitation resistance of structural materials in pulsed liquid metal targets by surface hardening
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Cavitation damage of structural materials due to pressure waves is expected to be one of the major life-time limiting factors in high power liquid metal spallation targets under pulsed operation. Two methods are developed for the European Spallation Source (ESS) to mitigate this damage: Introduction of gas bubbles to suppress the pressure pulse, and surface hardening of structural materials to reduce their vulnerability. Surface hardening of four 8-13% Cr martensitic steels was performed by thermal treatment with pulsed or scanned electron- and laser beams as well as by nitriding in a r.f. plasma. Parametric dependences of these processes were investigated and partially optimised. Thermal treatment with electrons reached HV-hardness values up to about 600, laser treatment up to 710, and nitriding above 1200. After mechanical and metallographical characterisation, specimens of 12% Cr steel were tested in liquid mercury under pulsed proton irradiation, and under mechanical pulse-loading. Surface damage was analysed by optical, confocal laser, and scanning-electron microscopy, showing in all tests much better resistance of the hardened material compared to standard condition. Application of these techniques to a spallation target is outlined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 343, Issues 1â3, 1 August 2005, Pages 92-100
Journal: Journal of Nuclear Materials - Volume 343, Issues 1â3, 1 August 2005, Pages 92-100
نویسندگان
T. Koppitz, P. Jung, G. Müller, A. Weisenburger, M. Futakawa, Y. Ikeda,