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Characterization of Hot Isostatically Pressed Ni-Based Superalloy IN 713C

열간 등압 성형된 니켈기 초내열 합금 IN 713C 분말 소결체의 특성 평가

  • Kim, Youngmoo (Defense Materials and Evaluation Technology Directorate, Agency for Defense Development) ;
  • Kim, Eun-Pyo (Defense Materials and Evaluation Technology Directorate, Agency for Defense Development) ;
  • Chunga, Seong-Taek (Cetatech. Co. GTIC) ;
  • Lee, Seong (Defense Materials and Evaluation Technology Directorate, Agency for Defense Development) ;
  • Noh, Joon-Woong (Defense Materials and Evaluation Technology Directorate, Agency for Defense Development) ;
  • Lee, Sung Ho (Defense Materials and Evaluation Technology Directorate, Agency for Defense Development) ;
  • Kwon, Young-Sam (Cetatech. Co. GTIC)
  • 김영무 (국방과학연구소 국방소재기술부) ;
  • 김은표 (국방과학연구소 국방소재기술부) ;
  • 정성택 ((주)쎄타텍) ;
  • 이성 (국방과학연구소 국방소재기술부) ;
  • 노준웅 (국방과학연구소 국방소재기술부) ;
  • 이성호 (국방과학연구소 국방소재기술부) ;
  • 권영삼 ((주)쎄타텍)
  • Received : 2013.08.12
  • Accepted : 2013.08.21
  • Published : 2013.08.28

Abstract

Nickel-based superalloy IN 713C powders have been consolidated by hot isostatic pressing (HIPing). The microstructure and mechanical properties of the superalloys were investigated at the HIPing temperature ranging from $1030^{\circ}C$ to $1230^{\circ}C$. When the IN 713C powder was heated above ${\gamma}^{\prime}$ solvus temperature (about $1180^{\circ}C$), the microstructure was composed of the austenitic FCC matrix phase ${\gamma}$ plus a variety of secondary phases, such as ${\gamma}^{\prime}$ precipitates in ${\gamma}$ matrix and MC carbides at grain boundaries. The yield and tensile strengths of HIPed specimens at room temperature were decreased while the elongation and reduction of area were increased as the processing temperature increased. At $700^{\circ}C$, the strength was similar regardless of HIPing temperature; however, the ductility was drastically increased with increasing the temperature. It is considered that these properties compared to those of cast products are originated from the homogeneity of microstructure obtained from a PM process.

Keywords

References

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