Microstructure, tensile properties and thermal stability of AlMgSiScZr alloy printed by laser powder bed fusion

Bi, Jing; Lei, Zhenglong; Chen, Yanbin; Chen, Xi; Tian, Ze; Lu, Nannan; Qin, Xikun; Liang, Jingwei

doi:10.1016/j.jmst.2020.08.033

Cited by 69 publications

(17 citation statements)

References 63 publications

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“…Figure 19. (a-b) Yield strength and (c) elongation as a function of temperature for LPBF-processed Al-10Ce-8Mn[126], Al-2.9Mg-2.1Zr[47], Al-14.1Mg-0.47Si-0.31Sc-0.17Zr[115], Al-8.6Cu-0.45Mn-0.90Zr[65], Al-12.1Si-1.4Ni-1.4Fe[277], Al-2.3Cu-1.6Mg-1.1Ni-0.8Fe-3.5Ti-1.2B[263], Al-10Si-0.3Mg with 2 vol.-% 2-4μm-TiCN[262], CP-Al with 35 vol.-% TiC[155], and Al-29.9Nd-7.6Ni-3.1Co[278]. For comparison, data for AM Al-10Si-0.3Mg are also shown[279].…”

mentioning

confidence: 99%

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

147

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Research on powder-based additive manufacturing of aluminium alloys is rapidly increasing, and recent breakthroughs in printing of defect-free parts promise substantial movement beyond traditional Al-Si-Mg) systems. One potential technological advantage of aluminium additive manufacturing, however, has received little attention: the design of alloys for use at T >~200°C, or~1/2 of the absolute melting temperature of aluminium. Besides offering lightweighting and improved energy efficiency through replacement of ferrous, titanium, and nickel-based alloys at 200-450°C, development of such alloys will reduce economic roadblocks for widespread implementation of aluminium additive manufacturing. We herein review the existing additive manufacturing literature for three categories of potential hightemperature alloys, discuss strategies for optimizing microstructures for elevatedtemperature performance, and highlight gaps in current research. Although extensive microstructural characterisation has been performed on these alloys, we conclude that evaluations of their high-temperature mechanical properties and corrosion responses are severely deficient.

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confidence: 99%

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

147

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“…However, the L-PBF-manufactured Al-15%Fe alloy exhibits refined microstructures [20,21] containing numerous nanosized particles of the metastable Al 6 Fe phase [22]. Moreover, the L-PBF-manufactured Al-15%Fe alloy shows a high yield strength of about 400 MPa at 300 • C [23], which is higher than that of both the 8xxx alloy series [24,25] (Al-Fe-based alloys used in powder metallurgy) and the L-PBF-manufactured Al-based multi-element alloys [18,26]. The hardness of these specimens slightly decreases after long-term thermal exposure, suggesting that the high thermal stability of the nanosized metastable Al 6 Fe phase strengthens the L-PBF-manufactured Al-Fe alloys.…”

Section: Introductionmentioning

confidence: 98%

Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures

et al. 2022

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The samples of the Al–15Fe (mass%) binary alloy that were additively manufactured by laser powder bed fusion (L-PBF) were exposed to intermediate temperatures (300 and 500 °C), and the thermally induced variations in their microstructural characteristics were investigated. The L-PBF-manufactured sample was found to have a microstructure comprising a stable θ-Al13Fe4 phase localized around melt-pool boundaries and several spherical metastable Al6Fe-phase particles surrounded by a nanoscale α-Al/Al6Fe cellular structure in the melt pools. The morphology of the θ phase remained almost unchanged even after 1000 h of exposure at 300 °C. Moreover, the nanoscale α-Al/Al6Fe cellular structure dissolved in the α-Al matrix; this was followed by the growth (and nucleation) of the spherical Al6Fe-phase particles and the precipitation of the θ phase. Numerous equiaxed grains were formed in the α-Al matrix during the thermal exposure, which led to the formation of a relatively homogenous microstructure. The variations in these microstructural characteristics were more pronounced at the higher investigated temperature of 500 °C.

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“…13 However, due to the lack of criteria for comparison, the early literature did not delve into the differences in the properties formed on the surface of AlN ceramic to explain the specific reasons for the formation of such differences. 14,15 In this paper, a new way is introduced to analyze the formation mechanism of the differences in laser activation processing under different air environments, by using the intensity distribution of the focused laser beam.…”

Section: Introductionmentioning

confidence: 99%

“…used ultra‐violet and near‐infrared neodymium‐doped yttrium aluminum garnet lasers to machine linear grooves on the surface of AlN ceramic and found that the laser pulse overlap ratio was the main factor influencing the surface roughness of the machined portion of the AlN ceramic as well as the angle of the groove walls 13 . However, due to the lack of criteria for comparison, the early literature did not delve into the differences in the properties formed on the surface of AlN ceramic to explain the specific reasons for the formation of such differences 14,15 . In this paper, a new way is introduced to analyze the formation mechanism of the differences in laser activation processing under different air environments, by using the intensity distribution of the focused laser beam.…”

Section: Introductionmentioning

confidence: 99%

Effect of laser parameters and atmosphere in the structuring of aluminum nitride

Shao

Dong

Zhang

et al. 2022

Int J Applied Ceramic Tech

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The characteristics and formation mechanism of V-shaped groove formed by laser-activated metallization of aluminum nitride (AlN) ceramic under different shielding gas environments of air, nitrogen, and argon are investigated, using a novel analysis way which is based on the intensity distribution of the focused laser beam. It is found that the width of the V-shaped groove is slightly different under different gas environments, and the depth of the V-shaped groove is nearly the same, which means that the energy thresholds required for laser decomposition of AlN ceramic are different in various gas environments: air > nitrogen > argon, and the energy required for laser etching AlN ceramic is the same. It is also found that the nonlinearity in the curves of depth and width versus different machining parameters, which are explained in detail.

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Microstructure, tensile properties and thermal stability of AlMgSiScZr alloy printed by laser powder bed fusion

Cited by 69 publications

References 63 publications

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures

Effect of laser parameters and atmosphere in the structuring of aluminum nitride

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