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CMSX-10 단결정 초내열합금에서 거시편석에 따른 γ/γ' 응고조직 형성 KCI 등재 SCOPUS

Investigation of γ/γ' Growth by Macro Segregation in the Ni-Base Single Crystal Superalloy, CMSX-10

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  • URLhttps://db.koreascholar.com/Article/Detail/307015
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한국재료학회지 (Korean Journal of Materials Research)
한국재료학회 (Materials Research Society Of Korea)
초록

The γ/γ´ two-phases, commonly known as a eutectic structure, are observed in the γ interdendritic region of a Nibase superalloy. However, the growth behavior of the γ/γ´ two-phases, whether it is of eutectic or peritectic nature, has not been decidedly established. Directional solidifications were, thus, performed with the planar interface at a low growth rate of 0.5 μm/s in order to promote macro segregation. Directional solidification started with the γ planar interface and the γ´ phase nucleated on the γ planar interface at the solidification fraction of 0.75. The γ/γ´ two-phases showed the γ´ rod structure as major phase and the γ minor phase between γ´ rods, and the volume fraction of the γ phase changed continuously with an increasing solidification fraction. The two-phase γ/γ´ is seen as the coupled peritectic.

저자
  • 윤혜영(창원대학교 신소재공학부) | Hyeyoung Yoon
  • 성창훈(창원대학교 신소재공학부) | Changhoon Sung
  • 신종호(두산중공업(주)) | Jongho Shin
  • 한승전(재료연구소 소재실용화센터) | Seong Zeon Han
  • 이재현(창원대학교 신소재공학부) | Jehyun Lee Corresponding author