Microstructure evolution and mechanical behavior of Cu-7Ni-7Al-4Fe-2Mn alloy via a quenching-aging heat treatment

被引：4
作者：
Jiang, Hao [1 ]
Zhang, Xuebin [1 ,2 ,3 ]
Yang, Ran [2 ,3 ,4 ]
Zhou, Yanjun [1 ,2 ,3 ]
Huang, Shuhui [5 ]
Yu, Yan [6 ]
Yang, Wenhao [1 ]
Yu, Bo [1 ]
Liu, Dongdong [1 ]
Jiang, Kaixuan [1 ]
Huang, Kuan [1 ]
机构：
[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China
[2] Prov & Ministeral Coconstruct Collaborat Innovat C, Luoyang 471023, Peoples R China
[3] Henan Key Lab Adv Nonferrous Mat, Luoyang 471023, Peoples R China
[4] Henan Univ Sci & Technol, Sch Med Technol & Engn, Luoyang 471023, Peoples R China
[5] GRIMAT Engn Inst Co Ltd, Beijing 101407, Peoples R China
[6] Luoyang Ship Mat Res Inst, Luoyang 471023, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2024年 / 38卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Cu-7Ni-7Al-4Fe-2Mn alloy; Heat treatment; Microstructure; Mechanical properties; NICKEL-ALUMINUM BRONZE; CORROSION-RESISTANCE; FRACTURE-BEHAVIOR; NIAL BRONZE; DEFORMATION;
D O I：
10.1016/j.mtcomm.2024.108152
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of solution and aging treatment on the microstructure and mechanical properties of Cu-7Ni-7Al-4Fe-2Mn alloy were studied by means of optical microscope(OM), scanning electron microscope(SEM), transmission electron microscope(TEM) and an electronic tensile testing machine. The results show that the microstructure of the as-cast alloy is mainly composed of an alpha-Cu matrix, Fe3Al particles and NiAl phase distributed at the grain boundaries. After solution treatment, the distribution of bean-shaped Fe3Al particles in the microstructure of the alloy is more uniform than that of the as-cast state, and the larger square Fe3Al phase is redissolved and disappears. During the aging process, the NiAl phase is continuously precipitated in the grains. The strength and hardness of the alloy first increase and then decrease with the extension of the aging time. After aging treatment at 500 degrees C x 6 h, the hardness of the alloy is 231.4 HV, and the tensile strength is 538.5 MPa. The hardness is 78.8% higher than that of the as-cast state, and the tensile strength is 41.9% higher than that of the as-cast state.
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页数：11
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