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Effect of Strain Rate and Loading Direction on the Mechanical Properties of Ni-Cr-Al Superalloy Foam Fabricated by Powder Alloying Method
분말 합금법으로 제조된 Ni-Cr-Al 초합금 다공체의 인장 특성에 미치는 변형률 속도 및 하중 방향 효과
Kyu-Sik Kim, Jung-Suk Bae, Jae-Sung Oh, Kee-Ahn Lee
김규식, 배정석, 오재성, 이기안
Korean J. Met. Mater. 2020;58(6):375-382.   Published online 2020 May 20
DOI: https://doi.org/10.3365/KJMM.2020.58.6.375

The powder-alloyed metallic sheet foam manufacturing process has the advantage of being able to control pore shape, size, and distribution more easily and homogeneously than conventional foam manufacturing processes. The effects of strain rate and tensile direction on the mechanical properties of Ni-Cr-Al superalloy foam fabricated by powder alloying method..... More

Asymmetry in the Mechanical Properties of Block Ni-Cr-Al Superalloy Foam Fabricated by the Combination of Powder Alloying and Hot Rolling Processes
분말 합금법 및 고온 압연 공정으로 제조된 대형 블록 Ni-Cr-Al 초합금 다공체의 기계적 특성 비대칭성
Kyu-Sik Kim, Min-Chul Shim, Man-Ho Park, Jung-Yeul Yun, Kee-Ahn Lee
김규식, 심민철, 박만호, 윤중열, 이기안
Korean J. Met. Mater. 2020;58(2):103-111.   Published online 2020 Jan 8
DOI: https://doi.org/10.3365/KJMM.2020.58.2.103

A block Ni-Cr-Al superalloy foam with dimensions of 300 mm (width direction, WD) × 500 mm (rolling direction, RD) × 60 mm (normal direction, ND) was fabricated using powder alloying, multi-sheet stacking, and hot rolling processes. The structural characteristics, microstructure, and mechanical asymmetry of the block Ni-based foam were investigated...... More

Microstructure and Room Temperature Wear Properties of a Ni-Cr-B-Si-C Coating Layer Manufactured by the Laser Cladding Process
Laser Cladding 공정으로 제조된 Ni-Cr-B-Si-C 코팅층의 미세조직 및 상온 마모 특성
Tae-Hoon Kang, Kyu-Sik Kim, Soon-Hong Park, Kee-Ahn Lee
강태훈, 김규식, 박순홍, 이기안
Korean J. Met. Mater. 2018;56(6):423-429.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.423

A Ni-Cr-B-Si-C coating layer was manufactured on a plate of Fe base alloy using a laser cladding process, and the microstructural and mechanical properties of the laser cladded coating layer and a Ni electroplating layer (used as a reference material) were investigated. To identify the microstructural and mechanical properties, scanning..... More

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