Nuclear Engineering and Technology

  • 제34권6호
  • /
  • Pages.574-585
  • /
  • 2002
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지

Evaluation of Mechanical Properties of RPV Clad by Small Punch Tests

  • Lee, Joo-Suk (Korea Advanced Institute of Science and Technology) ;
  • Kim, In-Sup (Korea Advanced Institute of Science and Technology)
  • 발행 : 2002.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The microstructural characteristics and its related mechanical properties of RPV cladding have been investigated using small punch (SP) tests. SA508 Cl.3 RPV steel plates were overlay cladded with the type ER309L welding consumables by submerged arc welding process. Although the RPV clad material had a small portion of 5 ferrite phase, it still showed the ductile to brittle transition behavior The transition temperature was determined by the SP test and it depended on the content of $\sigma$ phase, specimen size, and determination methods. The fracture appearance of SP specimen was changed from circumferential to radial cracking as test temperature became low, and below the transition temperature region, ER309L cladding usually fractured along the 6 ferrite by the low temperature failure of ferrite phase.

키워드

참고문헌

  1. M. G. Hortsten, W. P. A. Belcher, Fracture toughness and tensile properties of irradiated reactor pressure vessel cladding material, Effect of Radiation on Materials: 20th International Symposium, ASTM STP 1405, S.T. Rosinski et. al. Eds., ASTM, West Conshohocken, PA, (2001)
  2. F. M. Haggag, Degradation of mechanical properties of stainless steel cladding due to neutron irradiation and thermal aging, Effect of Radiation on Materials: 16th International Symposium, ASTM STP 1175, A. S. Kumar et. al. Eds. ASTM, Philadelphia, (1993)
  3. F. M. Haggag, W. R. Corwin, R. K. Nanstard, Effects of irradiation on the fracture properties of stainless steel weld overlay cladding, Nuclear Engineering and Design, 124, 129-141, (1990) https://doi.org/10.1016/0029-5493(90)90359-6
  4. J. K. Sharples, D. P. G. Lidgbury, M. G. Horsten, R. Pelli, State-of-the-art review of cladding materials data, Severe accidents and Other Topics in the RPV Design-2000, PVP-Vol. 403, ASME, 195-204, (2000)
  5. J. A. Brooks, A. W. Thompson, Microstructural development and solidification cracking susceptibility of austenitic stainless steel welds, International Materials Reviews, Vol. 36, No. 1, 16-44, (1991)
  6. K. M. Lee, H. S. Cho, D. C. Choi, Effect of isothermal treatment of SAF 2205 duplex stainless steel on migration of ${\delta}/{\gamma}$ interface boundary and growth of austenite, Journal of Alloys and Compounds, 285, 156-161, (1999) https://doi.org/10.1016/S0925-8388(99)00014-6
  7. X. Mao, H. Takahashi, Development of a further-miniaturized specimen of 3mm diameter for TEM disk small punch tests, Journal of Nuclear Materials, 150, 42-52, (1987) https://doi.org/10.1016/0022-3115(87)90092-4
  8. X. Mao, T. Shoji, H. Takahashi, Characterization of fracture behavior in small punch test by combined recrystallization-etch method and rigid plastic analysis, Journal of Testing and Evaluation, Vol. 15, No. 1, 30-37, (1987) https://doi.org/10.1520/JTE11549J
  9. T. Misawa, S. Nagata, N. Aoki, J. Ishizaka, Y. Hamaguchi, Fracture toughness evaluation of fusion reactor structural steels ay low temperatures by small punch tests, Journal of Nuclear Materials, 169, 225-232, (1989) https://doi.org/10.1016/0022-3115(89)90538-2
  10. J. S. Cheon and I. S. Kim, Evaluation of thermal aging embrittlement in CF8 duplex stainless steel by small punch test, Journal of Nuclear Materials, 278, 96-103, (2000) https://doi.org/10.1016/S0022-3115(99)00213-5
  11. C. C. Tseng, Y. Shen, S. W. Thompson, M. C. Mataya, G. Krauss, Fracture and the formation of sigma phase , $M_{23}C_6$,and austenite from delta-ferrite in an AISI 304L Stainless steel, Matallurgical and Materials Transactions A, 25A, 1147-1158, (1994) https://doi.org/10.1007/BF02652290
  12. A. V. Kington and F. W. Noble, ${\sigma}$ phase embrittlement of a type 310 stainless steel, Materials Science and Engineering, A138, 259-266, (1991) https://doi.org/10.1016/0921-5093(91)90695-J
  13. T. S. Byun, E. H. Lee, J. D. Hunn, K. Farrell, L. K. Mansur, Characterization of plastic deformation in a disk bend test, Journal of Nuclear Materials, 294, 256-266, (2001) https://doi.org/10.1016/S0022-3115(01)00484-6
  14. A. K. Chosh, S. S. Hecker, Failure in thin sheets stretched over rigid punches, Matallurgical Transactions A, 6A, 1065-1074, (1975) https://doi.org/10.1007/BF02661361
  15. W. R. Cowin, R. G. Berggren, R. K. Nanstad, R. J. Gray, Fracture behavior of a neutron-irradiated stainless steel submerged arc weld cladding overlay, Nuclear Engineeing and Design, 89, 199-221, (1985) https://doi.org/10.1016/0029-5493(85)90155-4