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Hot Compression Behavior and Tensile Property of a Novel Ni-Co-Based Superalloy Prepared by electron beam smelting Layered Solidification Technology

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 283-292页

作者： Yong-Chao Gai Rui Zhang Chuan-Yong Cui Zi-Jian Zhou Yi Tan Yi-Zhou Zhou Xiao-Feng Sun Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The hot compression behavior and tensile strength after compression of a new Ni-Co-based superalloy produced using electron beam smelting layered(EBSL)solidification technology were *** compression tests were performed at temperatures of 1120℃and 1150℃,with strain rates of 1 s^(-1) and 0.01 s^(-1),reaching a true strain of *** strength was evaluated at room *** results revealed that this EBSL technology accelerates dynamic recrystallization(DRX),without compromising the strength of alloy.A significant correlation between the volume fraction of DRX and the strain rate was observed,with higher fractions at lower strain rates,leading to higher tensile ***,at the same strain rate,the specimens compressed at 1120℃exhibited higher tensile strength due to undissolvedγ′*** solution and aging heat treatment,the alloy maintained high tensile *** results suggested that the EBSL Ni-Co-based superalloy offers excellent prospects for practical applications.

关键词： Ni-Co-based superalloy Hot deformation electron beam smelting Tensile strength

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Recrystallization Behavior of the New Ni-Co-Based Superalloy with Fusion Structure Produced by electron beam smelting Layered Solidification Technology

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Acta Metallurgica Sinica(English Letters) 2023年第12期36卷 2013-2030页

作者： Hongyang Cui Yi Tan Rusheng Bai Lidan Ning Chuanyong Cui Xiaogang You Pengting Li School of Materials Science and Engineering Dalian University of TechnologyDalian 116024China Key Laboratory for Energy beam Metallurgy and Advanced Materials Preparation of Liaoning Province Dalian 116024.China Superalloys Division Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Zhongyuan Critical Metals Laboratory Zhengzhou UniversityZhengzhou 450001China

The new Ni-Co-based superalloy featuring a"fusion structure"was produced utilizing electron beam smelting layered solidification technology(EBSL).Experimental examination of hot compression deformation with varied settings for EBSL and conventional duplex process melting Ni-Co superalloys was *** per the study,EBSL-Ni-Co superalloys exhibited enhanced recrystallization susceptibility during hot ***,elevating deformation temperature,lowering strain rate,and augmenting strain collectively contribute to enlarging the volume fraction of dynamically recrystallized *** growth of grains occurred when the deformation temperature equaledγ′sub-solvus temperature and the strain rate was ***,exceeding theγ′solvus temperature during deformation significantly increases the particle size of dynamic recrystallization(DRX)***γ′phase can effectively modulate the DRX grain size through the pegging ***,it was revealed that the presence of the fusion structure aids in the generation of continuous dynamic recrystallization,discontinuous dynamic recrystallization,and twinning-induced dynamic recrystallization while the alloy undergoes hot *** mechanism promotes DRX granule formation and permits complete ***,the fusion structure was identified as playing a catalytic role in the dynamic recrystallization process of the new Ni-Co superalloy.

关键词： Dynamic recrystallization Hot deformation electron beam smelting Ni-Co-based superalloy Fusion structure

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