Effect of cold metal transfer mode and arc oscillation on the microstructure and properties of additive-manufactured 2319 aluminum alloy
This study examined cold metal transition (CMT) and arc oscillation effects on aluminum alloy additive manufacturing, addressing microstructure heterogeneity, anisotropy, and porosity. Comparative analysis of CMT, CMT + P (Plus), and CMT + O(Oscillation) revealed that CMT + O broadens the molten pool, enhances fluidity, reduces porosity to 0.42% (1.46% lower than non-oscillation), and promotes bubble escape. Microstructure analysis showed heterogeneous layers of equiaxed and columnar crystals. Arc oscillation improved homogeneity via secondary nucleation, reducing texture strength from 5.31 to 3.32 and weakening anisotropy. Mechanical tests indicated CMT + O achieved 77.9 HV 0.2 hardness, 7.6% higher tensile strength (216.7 MPa), and 26.4% increased elongation (13.4%), attributed to refined microstructure and ductile fracture characteristics.
Authors
- Jian Gou (ORCID: https://orcid.org/0000-0003-1894-2947)
- Jingshuai Zhu (ORCID: https://orcid.org/0009-0003-3686-8573)
- Dong Zhang (ORCID: https://orcid.org/0000-0001-7002-7661)
- Ju Gao (ORCID: https://orcid.org/0000-0001-7108-1192)
- Wenqiang Kou
Institutions
- Hong Kong Polytechnic University (HK)
- Shenyang University of Technology (CN)
- Beijing University of Technology (CN)
- Harbin Electric Corporation (China) (CN)
Publication Details
- Journal
- Materials Science and Technology
- Published
- 2025-09-29
- DOI
- https://doi.org/10.1177/02670836251383115
- Citations
- 5
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 3.57