DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 최벽파 | - |
dc.contributor.author | Ryou, KenHee | - |
dc.contributor.author | 류건희 | - |
dc.date.accessioned | 2024-07-26T19:31:35Z | - |
dc.date.available | 2024-07-26T19:31:35Z | - |
dc.date.issued | 2023 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1052042&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/321146 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 신소재공학과, 2023.2,[vii, 105 p. :] | - |
dc.description.abstract | Additive manufacturing (AM) recently got the spotlight since AM can produce complex-shaped parts for every single need by overcoming the existing limitation of traditional machining techniques. Therefore, the application of AM to the Ni-based superalloy which is used for gas turbines in the power plant and jet engines for aircraft is gathering much interest these days. However, the thermal stress resulting from AM technique-driven thermal mismatch act as a limitation of application. In addition, Ni-based superalloy with superior mechanical properties usually shows poor weldability and hot cracking occurs frequently when that alloy was used by AM. Therefore, in this dissertation, the hot cracking mechanism of Ni-based superalloy in AM was investigated and the alloy design for hot cracking prevention was conducted. The clarification of the novel hot cracking mechanism which was not reported yet was tried by proceeding with the microstructural characterization to apply AM to the Ni-based superalloy. Besides, Hf was added to prevent the hot cracking and the hot cracking prevention mechanism was also investigated using advanced characterization techniques. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | 적층 제조▼a합금 설계▼a미세조직▼a고온 균열▼aNi계 초합금 | - |
dc.subject | Additive manufacturing▼aAlloy design▼aMicrostructure▼aHot cracking▼aNi-based superalloy | - |
dc.title | (A) study on the hot cracking mechanism and printability improving strategy for the direct energy deposited Ni-based 738 alloy | - |
dc.title.alternative | 적층 제조된 Ni계 738 초합금의 고온 균열 원인 규명 및 적층성 개선 방안 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :신소재공학과, | - |
dc.contributor.alternativeauthor | Choi, Pyuck-Pa | - |
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