Microstructure and properties of QAl10-4-4 alloy fabricated by rheological squeeze casting

• Published in: Journal of materials research Vol. 38; no. 9; pp. 2453 - 2462
• Main Authors: Yin, Xinhua, Li, Yongkun, Zhou, Rongfeng, Xiong, Wentao, Wen, Ke, Liu, Chengxiang, Zhang, Yazhen
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 14-05-2023; Springer Nature B.V
• Subjects: Aluminum bronzes; Applied and Technical Physics; Biomaterials; Castings; Chemistry and Materials Science; Dispersion strengthening; Elongation; Inorganic Chemistry; Materials Engineering; Materials research; Materials Science; Mechanical properties; Microstructure; Nanotechnology; Phase composition; Rheological properties; Squeeze casting; Tensile strength; Nickel-aluminum bronze; Microstructure; Properties; Rheological squeeze casting
• ISSN: 0884-2914; 2044-5326
• DOI: 10.1557/s43578-023-00975-1

Nickel-aluminum bronze (NAB) has a complex phase composition, which will lead to different properties through different preparation processes. By rheological squeeze, the microstructure and mechanical properties of the QAl10-4-4 alloy were investigated in this paper. The results show that the α phase, β′ phase and к phase are present in as-cast, liquid squeeze and rheo-squeeze conditions. However, no к
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phase was not found in the rheo-squeeze part due to the inhibition of the enclosed cooling slope channel (ECSC). In addition, the tensile strength and elongation of rheo-squeeze part are 777.9 MPa and 3.39%, respectively. The tensile strength and elongation of rheo-squeeze castings are increased by 24.8 and 124.5%, respectively, compared to liquid squeeze castings. This improvement is primarily attributable to the uniform and fine microstructure, fine grain strengthening, and dispersion strengthening.
Graphical abstract