Hot Compression Behavior and Tensile Property of a Novel Ni-Co-Based Superalloy Prepared by Electron Beam Smelting Layered Solidification Technology
作者机构：Key Laboratory of Materials Modification by LaserIonand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shi-Changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang110016China
出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)
年 卷 期：2024年第37卷第2期
页 面：283-292页
核心收录：
学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：The authors appreciate the financial support from the National Key R&D Program of China(2019YFA0705300) the National Science and Technology Major Project(J2019-VI-0006-0120) the Youth Innovation Promotion Association,CAS(No.2023202) the Natural Science Foundation Project of Liaoning Province(No.2023-MS-024).
主 题：Ni-Co-based superalloy Hot deformation Electron beam smelting Tensile strength
摘 要：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 investigated.Isothermal 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 0.51.Tensile strength was evaluated at room temperature.The 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 strength.Additionally,at the same strain rate,the specimens compressed at 1120℃exhibited higher tensile strength due to undissolvedγ′precipitates.After solution and aging heat treatment,the alloy maintained high tensile strength.The results suggested that the EBSL Ni-Co-based superalloy offers excellent prospects for practical applications.
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