Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

Microstructures and Mechanical Properties of DA Alloy 718

직접시효 처리된 Alloy718 합금의 미세조직과 기계적 특성

  • 엄칠용 (한국기계연구원 재료기술연소 공정연구부 소성응용그룹) ;
  • 염종택 (한국기계연구원 재료기술연소 공정연구부 소성응용그룹) ;
  • 박노광 (한국기계연구원 재료기술연소 공정연구부 소성응용그룹)
  • Published : 2004.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

Alloy 718 is normally used for the stationary and rotating parts of gas turbines due to its excellent combination of high temperature mechanical properties, formability and weldability. The mechanical properties of the Alloy 718 depend very much on grain size, as well as the strengthening phases, ${\gamma}'\;and\;{\gamma}'$. Direct aging is normally used to enhance tensile strengths at high temperatures. The grain structure of the superalloy components is mainly controlled during thermo-mechanical process by the dynamic, meta-dynamic recrystallization and grain growth. In this study, the influence of grain structure and heat treatment on tensile properties of direct-aged Alloy 718 was evaluated.

Keywords