Effect of hot oscillating pressing on microstructure and mechanical properties of FGH4095 nickel-based superalloy

doi:10.1016/j.jmst.2025.05.040

J. Mater. Sci. Technol. ›› 2026, Vol. 247: 279-288.DOI: 10.1016/j.jmst.2025.05.040

• Research article • Previous Articles Next Articles

Effect of hot oscillating pressing on microstructure and mechanical properties of FGH4095 nickel-based superalloy

Jingwei Chen^a,b,1, Chuncheng Lu^a,1, Enhui Wang^a,c,*, Tao Yang^a,c, Chunyu Guo^a,d, Yan Fan^b, Yingnan Shi^f, Jinhui Wang^e, Xinmei Hou^a,c,*

^aInstitute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, China;
^b608 Institute, Zhuzhou 412000, China;
^cInstitute of Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang 110000, China;
^dSchool of Materials, Sun Yat-sen University, Shenzhen 518107, China;
^eQinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, China;
^fGAONA Aero Material Co., Ltd., Beijing 100081, China

Received:2025-01-01 Revised:2025-05-08 Accepted:2025-05-23 Published:2026-03-10 Online:2026-03-23
Contact: ^*E-mail addresses: wangenhui@ustb.edu.cn (E. Wang), houxinmeiustb@ustb.edu.cn (X. Hou).
About author:¹These authors contributed equally to this work.

Abstract

Abstract: The preparation process is of great importance to the densification of nickel-based powder metallurgy superalloys. In this work, a novel approach of hot oscillating pressing (HOP) has been adopted to prepare dense FGH4095 superalloy (FGH4095). For comparison, the hot pressing (HP) process is also applied. MSC Marc is employed to optimize the sintering parameters of the HOP process. Benefited from the enhanced grain boundary sliding and plastic deformation resulting from the oscillation pressure, FGH4095 possesses a higher precipitation proportion of secondary γ′ phase with lower content of thermally induced porosity (TIP) and previous particle boundaries (PPBs) precipitated phases. Therefore, the room-temperature yield strength and ultimate tensile strength reach up to 1153 and 1433 MPa with an elongation of 10.46 %. A ductile damage model has been established to further investigate the mechanical properties of FGH4095 prepared by the HOP process. Based on the ABAQUS simulation, the tensile behavior of FGH4095 is predicted.

Key words: Hot oscillating pressing, Nickel-based powder superalloys, Microstructure, Mechanical properties, Simulation

Jingwei Chen, Chuncheng Lu, Enhui Wang, Tao Yang, Chunyu Guo, Yan Fan, Yingnan Shi, Jinhui Wang, Xinmei Hou. Effect of hot oscillating pressing on microstructure and mechanical properties of FGH4095 nickel-based superalloy[J]. J. Mater. Sci. Technol., 2026, 247: 279-288.

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Effect of hot oscillating pressing on microstructure and mechanical properties of FGH4095 nickel-based superalloy

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