High Temperature Mechanical Properties of 713LC Ni-based Superalloy

니켈기 초내열 713LC 합금의 고온 기계적 특성

  • 나영상 (한국기계연구원 표면연구부) ;
  • 김종엽 (삼성테크윈 소재개발센터) ;
  • 이종훈 (한국기계연구원 표면연구부) ;
  • 박노광 (한국기계연구원 공정연구부)
  • Published : 2003.12.30

Abstract

Alloy 713LC was developed to improve the tensile strength and ductility by reducing the carbon content of Alloy 713C. As Alloy 713LC was designed to minimize the mechanical property change with process conditions, it is generally utilized in the parts which have thick and thin sections simultaneously. In the thick and the thin sections, quite different properties are required. Consequently it is essential to crucially control the local mechanical properties of a parts by optimizing the process condition and heat treatment. In this research, high temperature mechanical properties including creep-rupture and strain-control low cycle fatigue were investigated together with the microstructural variations with heat treatment. Failure mechanism was also analyzed by observing the fracture surface to correlate the variation of mechanical properties with the microstructural change.

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