Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

Optimization of Friction Welded Joint Conditions in Alloy718 and the Nondestructive Evaluation

Alloy718 마찰접합조건의 최적화와 비파괴 평가

  • Kwon, Sang-Woo (Graduate School of Mechanical Engineering, Pukyong National University) ;
  • Kong, Yu-Sik (School of Mechanical Engineering, Pukyong National University) ;
  • Kim, Seon-Jin (School of Mechanical Engineering, Pukyong National University)
  • 권상우 (부경대학교 기계공학부 대학원) ;
  • 공유식 (부경대학교 기계공학부) ;
  • 김선진 (부경대학교 기계공학부)
  • Published : 2008.02.28
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Abstract

Friction welding was performed to investigate mechanical properties for Ni-base superalloy with 15 mm diameter solid bar. The main friction welding parameters were selected to endure good quality welds on the basis of visual examination, tensile tests, impact energy test, Vickers hardness surveys of the bond of area and heat affected zone. And then, the nondestructive technique to evaluate the weld quality was carried out by acoustic emission(AE) and ultrasonic attenuation coefficient. The tensile strength of the friction welded joint was shown up to 90 % of the Alloy718 base metal under the condition of the heating time over 5 sec. The optimal welding conditions were n=2,000 rpm, $P_1=200$ MPa, $P_2=200$ MPa, $t_1=8$ sec and $t_2=5$ sec when the total upset length was 4.4 mm.

Keywords

References

  1. 대한용접학회 (1998). 용접.접합편람, pp 663-664
  2. 오세규, 김부안, 김선진, 남상훈 (1988). “S45C와 SCM4의 마찰용접 및 피로특성에 관한 연구”, 한국해양공학회지, 제2권, 제2호, pp 312-321
  3. 이배섭, 공유식, 김선진 (2005). “해양차량 쇽업소버용 강재의 이종 마찰용접과 AE 평가”, 한국해양공학회지, 제19권, 제1호, pp 44-48
  4. Adams, D.F. and Taylor, S.K. (1969). 'Detection of Faults in Friction Welded studs by Ultrasonics”, Welding and Metal Fabrication, pp 412-421
  5. AWS(1981). Welding Handbook-VoL.1, Fundamentals of Welding, 7th edition, Vol 1, pp 153-220
  6. Cho, B.S. and Suh, S.J. (1997). 'Friction Welding of Inconel 713C and SCM440”, Journal of KWS, Vol 15, No 6, pp 78-84
  7. Jeong, H.S. and Shinoda, T. (1997). “Fundamental and Basic Application of Friction Welding”, Journal of KWS, Vol 15, No 6, pp 1-12
  8. Kong, Y.S. and Kim, S.J. (2006). “Mechanical Properties of Dissimilar Friction Welded Steel Bars in Relation to Post Weld Heat Treatment”, Trans. of the KSME(A), Vol 30, No 4, pp 402-408 https://doi.org/10.3795/KSME-A.2006.30.4.402
  9. Mary, C. and Jahazi, M. (2006). “Linear Friction Welding of IN718 Process Optimization and Microstructure Evolution”, Advanced Materials Research, Vols 15-17, pp 357-362 https://doi.org/10.4028/www.scientific.net/AMR.15-17.357
  10. Oh, S.K., Kong, Y.S., Yoo, I.J. and Kim, I.S. (2000). “Creep Life Prediction for Dissimilar Friction-Welded-Joints of Turbine Impeller Heat Resisting Steels and AE Evaluation(l)-FRW and AE Evaluation”, Proc. of International Offshore and Polar Eng. Conf., pp 203-207