Mechanical Properties and Microstructure of Thin-Walled Al-Cu Alloy Casting

This study aimed to investigate the tensile properties and microstructure of Al-Cu alloy casting with a dimension of ∅500 mm × 700 mm and a 5mm-thick wall at room temperature and 200°C. The results indicated that the strength and elongation of Al-Cu alloy casting at room temperature were excellent,...

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Bibliographic Details
Published in:Strength of materials 2022-03, Vol.54 (2), p.302-308
Main Authors: Xiang, L., Tao, J. Q., Chen, Q., Zhao, G. Z., Zhang, F. Y., Chai, S. X., Xing, Z. H., Li, M., Yang, E. C., Li, F.
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Copper
Dimpling
Dynamic recrystallization
Elongation
Grains
Materials Science
Mechanical properties
Microstructure
Room temperature
Solid Mechanics
Specialty metals industry
Tensile properties
Tensile tests
Thick walls
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Summary:This study aimed to investigate the tensile properties and microstructure of Al-Cu alloy casting with a dimension of ∅500 mm × 700 mm and a 5mm-thick wall at room temperature and 200°C. The results indicated that the strength and elongation of Al-Cu alloy casting at room temperature were excellent, exceeding 425 MPa and 8%, respectively. Such a good performance was attributed to the tiny equiaxed grains. However, the occurrence of acicular θ phase distributed around the α-Al matrix grains was disadvantageous to strength and especially to elongation. Moreover, no dynamic recrystallization was observed in the tensile tests at 200°C. Besides, numerous dimples were found in the fracture morphology, which were beneficial to the elongation.
ISSN:0039-2316
1573-9325
DOI:10.1007/s11223-022-00406-2