A novel crack-free Ti-modified Al-Cu-Mg alloy designed for selective laser melting

Zhang, Jinliang; Gao, Jianbao; Song, Bo; Zhang, Lijun; Han, Changjun; Cai, Chao; Zhou, Kun; Shi, Yusheng

doi:10.1016/j.addma.2020.101829

Cited by 80 publications

(45 citation statements)

References 51 publications

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“…2h, suggesting that the most misorientation angle is around 45° with even distribution. This is similar to the LPBFed Ti-modified Al-Cu-Mg alloys and Zr-modified Al-Cu-Mg alloys [55,61]. The average misorientation angles around the measured point are 42.04°, which can be used to calculate the geometrically necessary dislocations (GNDs) density ρ GND [62,63]:…”

Section: Grain Structuresupporting

confidence: 63%

“…). Compared to the LPBF printed Ti-modified Al-Cu-Mg alloys, the grain size in the present work is significantly smaller (0.86 μm vs. 1.64 μm), while the maximum texture intensity is similar (1.1 vs. 1.188)[55]. Compared to LPBFed Ti-modified A205 alloys, the grain size in the present work is similar (0.86 μm vs. 0.96 μm), while the maximum texture intensity is smaller (1.1 vs. 1.36)[37].…”

contrasting

confidence: 54%

“…The standard tensile tests show similar mechanical properties to the in situ tests despite the different sample morphology. Figure 8b and Ti-modified Al-Cu alloys [37,55], but higher than the TiB 2 pre-doped A205 alloys (269 MPa) [37].…”

Section: Mechanical Propertiesmentioning

confidence: 82%

“…The formation of fine grains due to heterogeneous nucleation also helps to prevent hot tearing via reducing volumetric solidification shrinkage during solidification [28,32]. This combination of fine and large TiB 2 particles reduces the distance between nucleation sites which causes fine grain in TiB 2 /Al-Cu composite, comparable or slightly finer than the other Ti-modified Al alloys [55].…”

Section: Secondary Particles (Al 2 Cu and Tib 2 )mentioning

confidence: 99%

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Synchrotron Characterisation of Ultra-Fine Grain TiB2/Al-Cu Composite Fabricated by Laser Powder Bed Fusion

Cai

Duan

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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Isotropy in microstructure and mechanical properties remains a challenge for laser powder bed fusion (LPBF) processed materials due to the epitaxial growth and rapid cooling in LPBF. In this study, a high-strength TiB2/Al-Cu composite with random texture was successfully fabricated by laser powder bed fusion (LPBF) using pre-doped TiB2/Al-Cu composite powder. A series of advanced characterisation techniques, including synchrotron X-ray tomography, correlative focussed ion beam–scanning electron microscopy (FIB-SEM), scanning transmission electron microscopy (STEM), and synchrotron in situ X-ray diffraction, were applied to investigate the defects and microstructure of the as-fabricated TiB2/Al-Cu composite across multiple length scales. The study showed ultra-fine grains with an average grain size of about 0.86 μm, and a random texture was formed in the as-fabricated condition due to rapid solidification and the TiB2 particles promoting heterogeneous nucleation. The yield strength and total elongation of the as-fabricated composite were 317 MPa and 10%, respectively. The contributions of fine grains, solid solutions, dislocations, particles, and Guinier–Preston (GP) zones were calculated. Failure was found to be initiated from the largest lack-of-fusion pore, as revealed by in situ synchrotron tomography during tensile loading. In situ synchrotron diffraction was used to characterise the lattice strain evolution during tensile loading, providing important data for the development of crystal-plasticity models.

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Section: Grain Structuresupporting

confidence: 63%

contrasting

confidence: 54%

Section: Mechanical Propertiesmentioning

confidence: 82%

Section: Secondary Particles (Al 2 Cu and Tib 2 )mentioning

confidence: 99%

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Synchrotron Characterisation of Ultra-Fine Grain TiB2/Al-Cu Composite Fabricated by Laser Powder Bed Fusion

Cai

Duan

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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“…The formation of fully equiaxed grain structures may also be promoted by the introduction of alloying additions other than Zr or Sc. Recent studies by Martin [86,87], although constitutional supercooling from Ta and Ti dissolved in the matrix likely plays a role in the effectiveness of the Al 3 Ta and Al 3 Ti intermetallics as well [88].…”

Section: Grain Structuresmentioning

confidence: 99%

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

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

143

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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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Laser Powder Bed Fusion

2023

Metal Powder–Based Additive Manufacturing

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A novel crack-free Ti-modified Al-Cu-Mg alloy designed for selective laser melting

Cited by 80 publications

References 51 publications

Synchrotron Characterisation of Ultra-Fine Grain TiB2/Al-Cu Composite Fabricated by Laser Powder Bed Fusion

Synchrotron Characterisation of Ultra-Fine Grain TiB2/Al-Cu Composite Fabricated by Laser Powder Bed Fusion

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

Laser Powder Bed Fusion

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