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

IF 11.2 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science & Technology Pub Date : 2025-06-25 DOI:10.1016/j.jmst.2025.05.040

Jingwei Chen, Chuncheng Lu, Enhui Wang, Tao Yang, Chunyu Guo, Yan Fan, Yingnan Shi, Jinhui Wang, Xinmei Hou

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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.

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热振荡压制对FGH4095镍基高温合金组织和力学性能的影响

制备工艺对镍基粉末冶金高温合金的致密化具有重要意义。本文采用热振荡压制（HOP）的新方法制备了致密FGH4095高温合金（FGH4095）。为了比较，还应用了热压（HP）工艺。采用MSC Marc对HOP工艺的烧结参数进行了优化。振荡压力增强了FGH4095的晶界滑动和塑性变形，使FGH4095的二次γ′相析出比例更高，而热致孔隙率（TIP）和先前颗粒界（PPBs）析出相含量较低。室温屈服强度和极限抗拉强度分别达到1153和1433 MPa，伸长率为10.46%。为了进一步研究HOP工艺制备的FGH4095的力学性能，建立了延性损伤模型。基于ABAQUS仿真，对FGH4095的拉伸性能进行了预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Science & Technology 工程技术-材料科学：综合

CiteScore

20.00

自引率

11.00%

发文量

995

审稿时长

13 days

期刊介绍： Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.