Investigation on high-temperature mechanical properties of Al–7Si–0.6Mg alloy by wire + arc additive manufacturing

Li, Chengde; Gu, Hui; Wang, Wei; Wang, Shuai; Ren, Lingling; Zhu, Ming; Zhai, Yuchun; Wang, Zhenbiao

doi:10.1080/02670836.2020.1799136

Cited by 12 publications

(2 citation statements)

References 30 publications

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“…The Al-7Si-0.6Mg (4220) alloy is suitable for melting-based processing without tendency to crack [ 128 ]. Thus, these alloys are well-suited for WAAM combined with artificial aging [ 129 , 130 ]. Yang et al showed that 4220 in as-deposited state has a relatively poor tensile strength of 130

, but can be raised to 350

in T6 state [ 131 , 132 ].…”

Section: Aluminum Alloys For Waammentioning

confidence: 99%

Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing

et al. 2021

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Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low investment and operational expenses, WAAM is well-suited for implementation in a range of industries. The process nature involves fusion melting of a feedstock wire by an electric arc where metal droplets are strategically deposited in a layer-by-layer fashion to create the final shape. The inherent fusion and solidification characteristics in WAAM are governing several aspects of the final material, herein process-related defects such as porosity and cracking, microstructure, properties, and performance. Coupled to all mentioned aspects is the alloy composition, which at present is highly restricted for WAAM of aluminum but received considerable attention in later years. This review article describes common quality issues related to WAAM of aluminum, i.e., porosity, residual stresses, and cracking. Measures to combat these challenges are further outlined, with special attention to the alloy composition. The state-of-the-art of aluminum alloy selection and measures to further enhance the performance of aluminum WAAM materials are presented. Strategies for further development of new alloys are discussed, with attention on the importance of reducing crack susceptibility and grain refinement.

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, but can be raised to 350

in T6 state [ 131 , 132 ].…”

Section: Aluminum Alloys For Waammentioning

confidence: 99%

Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing

et al. 2021

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“…Studies have reported that the arc energy influences the microstructure and mechanical properties [18]. With an increase in temperature, the internal porosity and grain size of the aluminium alloy increase, and its tensile and yield strengths gradually decrease [19]. e actively cooled deposition wall has lower surface roughness than the freely cooled deposition wall [20].…”

Section: Introductionmentioning

confidence: 99%

Development of a New Cold Metal Transfer Arc Additive Die Manufacturing Process

Zhang

Xing

Yang

et al. 2021

Advances in Materials Science and Engineering

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Due to its high efficiency, cold metal transfer (CMT) arc additive manufacturing presents considerable potential in the aluminium alloy additive manufacturing industry. However, during CMT arc additive manufacturing, the surrounding air environment promotes the lateral flow of liquid aluminium and the instability of the molten pool, reduces the surface quality and material utilisation of deposition walls, and causes internal hydrogen pores and coarse columnar grains, which negatively affect the structure and mechanical properties of the deposition walls. This study developed a CMT arc additive die manufacturing process to control the substrate material and deposition path to improve the physical properties of the deposition wall. The experimental results indicated that the copper plates can affect molten pool flow and material formation in the additive process, minimise hydrogen pores, and refine columnar grains. The porosity dropped from 2.03% to 0.93%, and the average grain size decreased from 16.2 ± 1.4 to 13.6 ± 1.3 μm, thereby enhancing the structure and mechanical properties of the deposition wall to attain standard additive manufacturing products.

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