Effect of laser power on formability, microstructure and mechanical properties of selective laser melted Mg-Al-Zn alloy

Wang, Xingcheng; Chen, Changjun; Zhang, Min

doi:10.1108/rpj-04-2019-0113

Cited by 15 publications

(6 citation statements)

References 33 publications

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“…The decreased mechanical response in the BD is likely due to oxidation and carbides from the graphite coatings on the feedstock rods becoming entrapped in layer interfaces [25], causing slight anisotropy in the bulk WE43 deposit. The observed anisotropy is similar to that reported in magnesium alloys created by beam-based AM methods [48]. Although the LD and BD do not perform as well as the WE43-T5 feedstock, the YS and UTS have a minimum increase of 41.6% and 3.5%, respectively, when compared to the WE43 as-cast material.…”

Section: Quasi-static Response Of Bulk We43 Depositsupporting

confidence: 83%

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Elucidating the Effect of Additive Friction Stir Deposition on the Resulting Microstructure and Mechanical Properties of Magnesium Alloy WE43

Williams

Robinson

Williamson

et al. 2021

Metals

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In this work, the effect of processing parameters on the resulting microstructure and mechanical properties of magnesium alloy WE43 processed via Additive Friction Stir Deposition (AFSD), a nascent solid-state additive manufacturing (AM) process, is investigated. In particular, a parameterization study was carried out, using multiple four-layer deposits, to identify a suitable process window for a structural 68-layers bulk WE43 deposition. The parametric study identified an acceptable set of parameters with minimal surface defects and excellent consolidation for the fabrication of a bulk WE43 deposition. Microstructural, tensile, and fatigue life characterization was conducted on the bulk WE43 deposition and compared to commercially available wrought material to elucidate the process-structure-property-performance (PSPP) relationship of the AFSD process. This study shows that the bulk WE43 deposit exhibited a refined homogenous microstructure and a texture shift relative to the wrought material. However, a reduction in hardness and tensile behavior was observed in the as-deposited WE43 compared to the wrought control. Additionally, fatigue specimens extracted from the bulk deposition exhibited a decrease in life in the low-cycle regime but performed comparably to the wrought plate in the high-cycle regime. The outcomes of this study illustrate the potential of the AFSD process in additively manufactured structural load-bearing components made with magnesium alloy WE43 in the as-built condition.

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Section: Quasi-static Response Of Bulk We43 Depositsupporting

confidence: 83%

“…Future research should investigate a deposition made in an inert atmosphere to mitigate oxidation effects and the strength regained when a T5 temper is applied to an as-deposited WE43 build. [48] 137 217 WE43 LPBF [14] 214.4 ± 3.54 250.9 ± 2.92 2.62 ± 0.29 * *-ASTM E8M-3856.…”

Section: Quasi-static Response Of Bulk We43 Depositmentioning

confidence: 99%

Elucidating the Effect of Additive Friction Stir Deposition on the Resulting Microstructure and Mechanical Properties of Magnesium Alloy WE43

Williams

Robinson

Williamson

et al. 2021

Metals

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“…Also, a large fluctuation in hardness and elongation for LB-PBF parts was observed, which could be attributed to the inhomogeneous distribution of mechanical properties (Khorasani et al, 2017a(Khorasani et al, , 2017b(Khorasani et al, , 2017cChoi et al, 2017;Khorasani et al, 2017aKhorasani et al, , 2017bKhorasani et al, , 2017c. The effect of laser power on the mechanical properties of AZ61 alloy was studied by Wang et al (Wang et al, 2020). They found that higher laser power leads to an increase in the ultimate strength, but the best relative density was achieved with a laser power of 80 W. In this sense, for LB-PBF methods, the mechanical properties are a function of process parameters, powder particle size, printing strategy, preprocessing and the placement position of the components being built.…”

Section: Mechanical Properties Of Laser-based Powder Bed Fusionmentioning

confidence: 99%

Laser subtractive and laser powder bed fusion of metals: review of process and production features

Khorasani¹,

Gibson

Ghasemi³

et al. 2023

RPJ

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Purpose The purpose of this study is, to compare laser-based additive manufacturing and subtractive methods. Laser-based manufacturing is a widely used, noncontact, advanced manufacturing technique, which can be applied to a very wide range of materials, with particular emphasis on metals. In this paper, the governing principles of both laser-based subtractive of metals (LB-SM) and laser-based powder bed fusion (LB-PBF) of metallic materials are discussed and evaluated in terms of performance and capabilities. Using the principles of both laser-based methods, some new potential hybrid additive manufacturing options are discussed. Design methodology approach Production characteristics, such as surface quality, dimensional accuracy, material range, mechanical properties and applications, are reviewed and discussed. The process parameters for both LB-PBF and LB-SM were identified, and different factors that caused defects in both processes are explored. Advantages, disadvantages and limitations are explained and analyzed to shed light on the process selection for both additive and subtractive processes. Findings The performance of subtractive and additive processes is highly related to the material properties, such as diffusivity, reflectivity, thermal conductivity as well as laser parameters. LB-PBF has more influential factors affecting the quality of produced parts and is a more complex process. Both LB-SM and LB-PBF are flexible manufacturing methods that can be applied to a wide range of materials; however, they both suffer from low energy efficiency and production rate. These may be useful when producing highly innovative parts detailed, hollow products, such as medical implants. Originality value This paper reviews the literature for both LB-PBF and LB-SM; nevertheless, the main contributions of this paper are twofold. To the best of the authors’ knowledge, this paper is one of the first to discuss the effect of the production process (both additive and subtractive) on the quality of the produced components. Also, some options for the hybrid capability of both LB-PBF and LB-SM are suggested to produce complex components with the desired macro- and microscale features.

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“…Mn is one of the most conventional alloying elements in Mg alloys. In Mn-containing Mg-Al series magnesium alloys, Al 8 Mn 5 is the second common phase in addition to Mg 17 Al 12 [52,55,60,125,126]. It is reported that possible oxidation reactions in Mg-RE alloys, and indicated an oxygen affinity order of Y > Gd > Nd > Mg > Zr [131], confirming that Y 2 O 3 was the preferred oxide phase in AMprocessed Mg-RE alloy, which is consistent with the experimental observations.…”

Section: Phase Constituentmentioning

confidence: 99%

Additive manufacturing of magnesium and its alloys: process-formability-microstructure-performance relationship and underlying mechanism

Sui,

Guo,

et al. 2023

Int. J. Extrem. Manuf.

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Magnesium and its alloys, as a promising class of materials, is popular in lightweight application and biomedical implants due to their low density and good biocompatibility. Additive manufacturing (AM) of Mg and its alloys is of growing interest in academia and industry. The domain-by-domain localized forming characteristics of AM leads to unique microstructures and performances of AM-processed Mg and its alloys, which are different from those of traditionally manufactured counterparts. However, the intrinsic mechanisms still remain unclear and need to be in-depth explored. Therefore, this work aims to discuss and analyze the possible underlying mechanisms regarding defect appearance and elimination, microstructure formation and evolution, and performance improvement, based on presenting a comprehensive and systematic review on the relationship between process parameters, forming quality, microstructure characteristics and resultant performances. Lastly, some key perspectives requiring focus for further progression are highlighted to promote development of AM-processed Mg and its alloys and accelerate their industrialization.

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Effect of laser power on formability, microstructure and mechanical properties of selective laser melted Mg-Al-Zn alloy

Cited by 15 publications

References 33 publications

Elucidating the Effect of Additive Friction Stir Deposition on the Resulting Microstructure and Mechanical Properties of Magnesium Alloy WE43

Elucidating the Effect of Additive Friction Stir Deposition on the Resulting Microstructure and Mechanical Properties of Magnesium Alloy WE43

Laser subtractive and laser powder bed fusion of metals: review of process and production features

Additive manufacturing of magnesium and its alloys: process-formability-microstructure-performance relationship and underlying mechanism

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