Journal of Welding and Joining

  • 제13권1호
  • /
  • Pages.78-88
  • /
  • 1995
  • /
  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지

인공해수의 pH에 따른 강 용접부의 응력 부식균열거동에 관한 연구

A Study on the Stress Corrosion Cracking Behaviors for Weld Joint of Steel with Various pH Values in Synthetic Sea Water

  • 발행 : 1995.03.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This paper was performed to study the utility of the SP(small punch) test and the AE(acoustic emission) test in the evaluation of SCC(stress corrosion cracking) susceptibility for parent metal and bond line of HT80 steel-weld joint by SAW(submerged arc welding) with the various pH values. The loading rate used was 3*10$^{-4}$ mm/min and the corrosive environment used was synthetic sea water during the SP test and the AE test. According to the test results, the SCC susceptibility of the parent metal was increased in the order of pH6.0, pH8.2 and pH10.0. On the other hand, the bond line showed almost the same high SCC susceptibility in all pH concentrations. Synthetically, from the results of the SCC susceptibility, the macro- and micro-SEM observation, the microfracture behaviors by AE test and the relationship between SCC susceptibility and displacement at incipient failure, .delta.$_{i.f-AE}$, it can be concluded that the SP test and the AE test are the good test methods to evaluate the SCC susceptibility for parent metal and bond line of the weld joint with the change of environmental factors.

키워드

참고문헌

  1. 總合材料强度學講座 v.7 環境 高溫强度學 駒井謙治郞
  2. Corrosion v.28 Hydrogen Sulfide Stress Corrosion Cracking of high Strength Steel Wire H.E.Townsend.
  3. Corrosion v.37 no.11 The Effects of Alloying Additions Cracking Resistance R.N.Parkins.;P.W.Slattery.;B.S.Poulson.
  4. Naval Research Laboratory Stress Corrosion Cracking in High Strength Steels and in Titanium and in Aluminium Alloys M.J.Blackburn.;W.H.Smyrl.;J.A.Sweeny.
  5. 日本溶接學會誌 v.61 no.4 溶接部の應力腐食割れと對策, 溶接部の腐食(Ⅳ) 松島嚴
  6. ASTM STP 665 Evaluation of Slow Strain-Rate Stress Corrosion Tests Results J.H.Payer.;W.E.Berry.;W.K.Boyd.
  7. STP 821 Slow-St-rain-Rate Stress Corrosion Testing of Aluminum Alloys N.J.H.Holroyd.;G.M.Scamans.
  8. 대한용접학회지 v.12 no.4 미소시험편에 의한 강용접부의 응력부식균열 평가에 관한 연구 유효선.;임재규.;정세희.
  9. 대한기계학회지 v.17 no.8 소형펀치시험법에 의한 응력부식균열평가에 관한 연구 유효선.;이송인.;임재규.;정세희.
  10. ASTM-D1141 Standard Specification for Substitute Ocean Water
  11. ASTM STP 656 Comparative Methods for Measuring Degree of Sensitization in Stainless Steel W.L.Clarke.;R.L.Cowan.;W.L.Walker.
  12. Corrosion v.23 Sulfide Stress Corrosion of Some Medium and Low Alloy Steels E.Snape.
  13. NACE-5 Environmental Aspects of Stress Corrosion Cracking in Low Strength Ferritic Steels R.N.Parkins.
  14. Res. Mech. v.13 Mechanism of Intergranular Stress Corrosion Cracking in Mild Steels W.Frank.;L.Graf.
  15. Arch. Eisenhuttenwessen v.39 Embrittlement of Various Steels by Absorption of Hydrogen from Wet Hydrogen Sulfide E.E.Hofmann.;E.Martin.;H.Kupper.
  16. 한국재료학회지 v.3 no.4 음향방출시험에 의한 고장력강의 응력부식균열전파거동에 관한 연구 유효선.;정세희.