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논문 기본 정보

자료유형
학술저널
저자정보
Kyu‑Sik Kim (Inha University) Tae‑Hoon Kang (Inha University) Man‑Ho Park (Inha University) Kee‑Ahn Lee (Inha University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.5
발행연도
2021.1
수록면
1,138 - 1,146 (9page)

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초록· 키워드

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Large unique block Ni–Cr–Al superalloy foam was fabricated using a combination method of powder-alloying, multi-sheetstacking, and hot compression processes. Subsequently, the compressive properties and deformation behaviors of multi-sheetstacked block metallic foam were investigated from room temperature to 1073 K. The analysis of the resulting structuralcharacteristics of the block foam showed that the interfaces between the sheets have complex strut interactions, such ascontacted (deformed) and intersected struts. The relative density was measured as 2.93% for sheet foam and 4.90% for blockfoam. The compressive deformation of sheet and block Ni–Cr–Al foams showed the typical compressive stress–strain curvesof plastically deformable metallic foams regardless of foam type. However, different deformation behaviors in the plateauregions were detected based on the type of foam. It is noteworthy that the yield strength of block foam showed a relativelylower value than that of sheet foam, even though the block foam had higher relative density. The existence of unique interfacesin the multi-sheet stacked block foam may have affected strength and plastic deformation. Finally, distinct compressivebehaviors related to the structural and microstructural characteristics of block Ni–Cr–Al foam are discussed.

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