کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9638209 | 505049 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fatigue assessment of the ITER TF coil case based on JJ1 fatigue tests
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
The material of the TF coil case in the ITER requires to withstand cyclic electromagnetic forces applied up to 3Â ÃÂ 104 cycles at 4.2Â K. A cryogenic stainless steel, JJ1, is used in high stress region of TF coil case. The fatigue characteristics (S-N curve) of JJ1 base metal and welded joint at 4.2Â K has been measured. The fatigue strength of base metal and welded joint at 3Â ÃÂ 104 cycles are measured as 1032 and 848Â MPa, respectively. The design S-N curve is derived from the measured data taking account of the safety factor of 20 for cycle-to-failure and 2 for fatigue strength, and it indicates that an equivalent alternating stress of the case should be kept less than 516Â MPa for the base metal and 424Â MPa for the welded joint at 3Â ÃÂ 104 cycles. It is demonstrated that the TF coil case has enough margins for the cyclic operation. It is also shown the welded joint should be located in low cyclic stress region because a residual stress affects the fatigue life.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volumes 75â79, November 2005, Pages 87-91
Journal: Fusion Engineering and Design - Volumes 75â79, November 2005, Pages 87-91
نویسندگان
K. Hamada, H. Nakajima, K. Takano, Y. Kudo, F. Tsutsumi, K. Okuno, C. Jong,