Investigation on High Temperature Mechanical Behaviors of TiC-γ′ Reinforced Ni Composite

Wenqiang Hu; Zhenying Huang; Qun Yu; Yuanbo Wang; Yidan Jiao; Yang Zhou; Hongxiang Zhai

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자료유형: 학술저널

저자정보: Wenqiang Hu (Beijing Jiaotong University) Zhenying Huang (Beijing Jiaotong University) Qun Yu (Beijing Jiaotong University) Yuanbo Wang (Beijing Jiaotong University) Yidan Jiao (Beijing Jiaotong University) Yang Zhou (Beijing Jiaotong University) Hongxiang Zhai (Beijing Jiaotong University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.8

발행연도: 2021.1

수록면: 3,003 - 3,012 (10page)

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A duplex TiC and γ′-Ni3(Al,Ti) reinforced nickel composite was fabricated through hot-press sintering a 30 vol% Ti2AlC–Nimixtures followed by thermal treatment method. Detailed microstructural detection was performed by adopting the routeof high-resolution transmission electron microscopy. In situ generated submicron TiC particulate and nanosized L12-γ′were homogeneously distributed in a fcc γ-Ni matrix. The high temperature tensile and compression behaviors of the TiC-γ′/Ni composites were evaluated in the temperature range of 25–800 °C. The results indicated that ultimate tensile andcompression properties exhibited the dependence of temperatures. The tensile properties of the composite determined at600 °C was 945 MPa, decreasing by 28.1% and 23.0% for elongation, compared to those of measured at room temperature(UTS = 1305 MPa, elongation = 5.35%). However, the yield strength exhibited the temperature independent until to 600 °C. The yield strength of the TiC-γ′/Ni composite are comparable with conventional superalloy under 600 °C, proving that TiCand γ′ particles constitute efficient reinforcements for Ni matrix according to thermal expansion dislocations strengthening,load-transfer and coherent strengthening mechanisms. The monotonic temperature dependence of yield strength at600–800 °C indicates that plastic deformation of TiC-γ′/Ni composite follows the thermally activated mechanism. TheTiC-γ′/Ni composite exhibited superior mechanical properties both at room and high temperatures, which can be ascribedto the synergistic strengthening effect in term of dislocation density, Orowan, coherent and atomic ordering strengtheningmechanisms. The present work reveals the deformation behaviors of in situ TiC-γ′/Ni composite from room to high temperatures,which is critical to predict the failure and thereby optimize the microstructure to further enhance the high temperatureproperties of TiC-γ′/Ni composite.

#Ni-matrix composite · TiC · Ni3(Al #Ti) · Microstructure · High temperature mechanical properties

참고문헌 (2)

참고문헌 신청

김명진 / 2009 / Electro-Deposition of Oxide-Dispersed Nickel Composites and the Behavior of Their Mechanical Properties / Metals and Materials International 15(5):789~795

이홍기 / 2008 / Electrolytic Deposition Behaviors of Ni-SiC Composite Coatings Containing Submicron-Sized SiC Particles / Metals and Materials International 14(5):599~605

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