한국분말재료학회지 (Journal of Powder Materials)

  • 제29권1호
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  • Pages.8-13
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  • 2022
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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직접 에너지 적층방식으로 제조된 V과 17-4PH 스테인리스강 이종재료의 접합계면 분석

Joint Interface Observation of V and 17-4PH Stainless Steel Dissimilar Materials Manufactured by Direct Energy Deposition

  • 투고 : 2022.02.08
  • 심사 : 2022.02.23
  • 발행 : 2022.02.28
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초록

In this study, we have prepared a Ti-6Al-4V/V/17-4 PH composite structure via a direct energy deposition process, and analyzed the interfaces using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The joint interfaces comprise two zones, one being a mixed zone in which V and 17-4PH are partially mixed and another being a fusion zone in the 17-4PH region which consists of Fe+FeV. It is observed that the power of the laser used in the deposition process affects the thickness of the mixed zone. When a 210 W laser is used, the thickness of the mixed zone is wider than that obtained using a 150 W laser, and the interface resembles a serrated shape. Moreover, irrespective of the laser power used, the expected σ phase is found to be absent in the V/17-4 PH stainless steel joint; however, many VN precipitates are observed.

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참고문헌

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