Zr 합금의 기계적 특성에 미치는 Nb와 Sn의 영향

Effect of Niobium and Tin on Mechanical Properties of Zirconium Alloys

  • 김경호 (한국원자력연구소, 핵연료피복관개발팀) ;
  • 최병권 (한국원자력연구소, 핵연료피복관개발팀) ;
  • 백종혁 (한국원자력연구소, 핵연료피복관개발팀) ;
  • 김선재 (한국원자력연구소, 핵연료피복관개발팀) ;
  • 정용환 (한국원자력연구소, 핵연료피복관개발팀)
  • Kim, Gyeong-Ho (Advanced Zr Alloy Development Team, Korea Atomic Energy Research Institute) ;
  • Choe, Byeong-Gwon (Advanced Zr Alloy Development Team, Korea Atomic Energy Research Institute) ;
  • Baek, Jong-Hyeok (Advanced Zr Alloy Development Team, Korea Atomic Energy Research Institute) ;
  • Kim, Seon-Jae (Advanced Zr Alloy Development Team, Korea Atomic Energy Research Institute) ;
  • Jeong, Yong-Hwan (Advanced Zr Alloy Development Team, Korea Atomic Energy Research Institute)
  • 발행 : 1999.02.01

초록

2원계 (Zr-xNb, Zr-xSnl 와 3원계 (Zr-O.8Sn-xNb, Zr-O.4Nb-xSnl Zr합금의 기계적 특성에 미치는 Nb와 Sn의 영향올 조사하기 위하여 인장시험 빛 마세조직 분석을 실시하였다. Nb와 Sn량이 많이 첨가될수록 2원계와 3원계 합금의 강도는 정진적으로 증가하는 경향을 보이는데, Nb와 Sn이 고용도 이상으로 첨가될 때 강도중가는 더욱 두드러진 것으로 냐타났다. 강도 증가현상을 고용강화, 석출강화, 결정립 미세화에 의한 강화, 집합조직에 의한 강화효과 관정에서 분석한 결과, 고용강화 효과가 가장 두드러지며 Nb와 Sn이 고용도 이상에서는 석출강화가 강도에 기여하는 것으로 냐타났다. 합금원소 첨가에 따른 결정립미세화도 강도에 약간은 영향을 미치는 것으로 사료된다. 그러나 집합조직은 합금원소 변화에 따라서 거의 변화가 없는 것으로 냐타났으므로 집합조직은 강도증가에 기여하지 않는 것으로 생각된다.

To investigate the effect of niobium and tin on the mechanical properties of zirconium alloys, the tensile test and the microstructural analysis were performed on the Zr-based binary(Zr-xNb, Zr-xSn) and ternary(Zr-0.8Sn-xNb, Zr-0.4Nb-xSn) alloys. As the content of Nb or Sn element increased, the strengths of the Zr-based alloys tended to gradually increase. The increase of mechanical strength was remarkable strength was remarkable in the range more than the solubility of Nb and Sn. The strengthening effects were discussed on the basis of the solid solution hardening, the precipitate hardening, the grain size effect, and the texture effect. The mechanical strength is mainly controlled by the solid solution hardening and additionally by the precipitate hardening in the content more than solubility limit of Nb and Sn. The grain refinement also has a slight effect on the strength of the zirconium alloys with the addition of Nb and Sn. However, the texture effect can be excluded due to the same Kearns number regardless of the content of alloying elements.

키워드

참고문헌

  1. J. of Nucl. Mater. v.131 M.Pahutova(et al.)
  2. IAEA Technical Commitee Meeting on Fundamental Aspects of Zirconium Base Alloys in Water Reactor Environments Portland G.R.Kilp;D.R.Thornburg;R.J.Comstock
  3. ASTM STP v.1023 Zirconium in the Nuclear Industry G.P.Sabol;G.R.Kilp;M.G.Balfour;E.Roberts
  4. Ninth International Symposium on Zirconium on Zirconium in the Nuclear Industry F.Garzarolli;F.Schlemmer;E.Steinberg;H.G.Weidinger
  5. International Topical Meeting on LWR Fuel Performance H.P.Fuchs;F.Garzarolli;H.G.Weidinger;R.P.Bodmer;G.Meier
  6. Ninth International Symposium on Zirconium in the Nuclear Industry T.Isobe;Y.Matsuo
  7. ASTM STP v.1132 Zirconium in the Nuclear Industry, Ninth International Symposium M.Harada;M.Kimpara;K.A be
  8. Ninth International Symposium on Zirconium in the Nuclear Industry R.G.Reschetnikov;A.V.Nikulina
  9. ASTM STP v.1245 T.Isobe;Y.Matsuoand;Y.Mae
  10. 대한금속학회지 v.33 no.5 정용환;김창호
  11. Second International Conference on Peaceful Uses of Automic Energy v.5 O.S.Ivanov;U.K.Grigorovitch
  12. 한국재료학회지 v.7 no.9 연영명;정용환;위명용
  13. 대한금속학회지 v.55 no.11 연영명;정용환;위명용
  14. Can. Met. Q. v.11 K.Kallstrom
  15. Westinghous Co, Report, WAPD-TM- J.J.Kearns
  16. J.Nucl. Mat. v.78 W.R.Thorpe;I.O.Smith
  17. 한국재료학회지 v.6 no.6 정용환
  18. J.Nucl. Sci. and Tech. v.24 M.Nakatsuka;M.Nagai