The effect of ageing time on the microstructure and properties of a warm-rolled Ni-W-Co-Ta medium–heavy alloy

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-10-03 DOI:10.1016/j.msea.2025.149225

Jin-jin Tang , Yi Xiong , Yong Li , Xiao-qin Zha , Shao-ru Zhang , Feng-zhang Ren , Shubo Wang

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Abstract

Ageing treatments were performed on a 50 % warm-rolled Ni-W-Co-Ta medium–heavy alloy for different time (1, 2, 4, 8,16 h) at 725 °C. The effects of ageing time on the microstructure and mechanical properties of the alloy were investigated. The results showed that after ageing treatment, a long-range ordered D1a-type Ni₄W strengthening phase precipitated in the alloy. As the ageing time increased, the size of the Ni₄W phase grew slightly, and the Ni₄W particles presented an approximately spherical shape, and the strength of the alloy first increased and then exhibited a slight decrease, and the elongation after fracture increased. When the ageing time was 8 h, the alloy exhibited a yield strength of 1903 MPa, and the tensile strength remained 2147 MPa, and the elongation after fracture reached 18 %, respectively. Under the combined action of precipitation strengthening, static recovery, and twinning strengthening, the alloy exhibited good overall mechanical properties.

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时效时间对热轧Ni-W-Co-Ta中重合金组织和性能的影响

对50%热轧Ni-W-Co-Ta中重合金在725℃下进行不同时效处理时间（1、2、4、8、16 h）。研究了时效时间对合金组织和力学性能的影响。结果表明：时效处理后，合金中析出长程有序的d1a型Ni4W强化相；随着时效时间的延长，Ni4W相的尺寸略有增大，Ni4W颗粒呈近似球形，合金的强度先增大后略有减小，断后伸长率增大。时效8 h时，合金的屈服强度为1903 MPa，抗拉强度为2147 MPa，断后伸长率达到18%。在析出强化、静态恢复和孪晶强化的共同作用下，合金具有良好的综合力学性能。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.