Ageing response of an Al-Mg-Mn-Sc-Zr alloy processed by laser metal deposition in thin-wall structures

Zhao, Tong; Cai, Wangcan; Dahmen, Marius; Schaible, Jonathan; Chen, Hong; Gasser, Andrés; Weisheit, Andreas; Biermann, Tim; Kelbassa, Ingomar; Zhang, Han; Gu, Dongdong; Schleifenbaum, Johannes Henrich

doi:10.1016/j.vacuum.2018.09.052

Cited by 18 publications

(7 citation statements)

References 29 publications

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“…HRTEM and associated [001] FFT in Figure 9b,c revealed the existence of secondary Al 3 Sc nanoprecipitates with a size of ~3.05 ± 0.54 nm according to the superlattice reflections. The precipitation of secondary Al 3 Sc has been reported in SLM fabricated and heat-treated Sc containing Al alloys [9,24,27]. Figure 10 illustrates a TEM BF image, an HRTEM image, and associated FFT of the post-process heat-treated Al-Mn-Sc specimen aged at 400 • C for 5 h (HT400).…”

Section: The Microstructure Characteristics and Aging Responsementioning

confidence: 90%

Heat Treatment Optimization for a High Strength Al–Mn–Sc Alloy Fabricated by Selective Laser Melting

et al. 2023

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A selective laser-melted Al–Mn–Sc alloy with 99.9% relative density has been obtained in this work through systematic process optimization. The as-fabricated specimen had the lowest hardness and strength, but the highest ductility. The aging response has shown that 300 °C/5 h is the peak aged condition, and it had the highest hardness, yield strength, ultimate tensile strength, and elongation at fracture. Such a high strength was attributed to the uniformly distributed nano-sized secondary Al3Sc precipitates. A further increase in aging temperature to 400 °C resulted in an over-aged condition, which contained a reduced volume fraction of secondary Al3Sc precipitates and resulted in a reduced strength.

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Section: The Microstructure Characteristics and Aging Responsementioning

confidence: 90%

Heat Treatment Optimization for a High Strength Al–Mn–Sc Alloy Fabricated by Selective Laser Melting

et al. 2023

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“…The mic structure of the top region presented the denser and smaller equiaxed [49]. Zhao et processed Al-4.55Mg-0.51Mn-0.65Sc-0.30Zr alloy thin-wall and observed the equiaxed and 8~10 μm sized grains near the bottom as well as the columnar 15~20 μm sized gra in the middle of deposition [59]. As shown in Figure 4b, the images of microstructur For example, Xue et al pointed out that the sub-grain size of the bottom, middle, and upper region of the CrCoNi medium-entropy alloy thin-wall was gradually increased owing to the decreased temperature gradient and then the cooling rate [58].…”

Section: Grain Sizementioning

confidence: 99%

Macroscopic and Microstructural Features of Metal Thin-Wall Fabricated by Laser Material Deposition: A Review

et al. 2022

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Owing to the versatility without expanding the machine’s size, thin-wall has been widely used in high-value parts. The investigation of laser additive manufacturing (LAM), which has advantages such as high powder density, easy controllability, and excellent stability, on the fabrication of thin-wall has drawn much attention. In this paper, the research status of macroscopic and microstructural features of metal thin-wall fabricated by LAM has been reviewed. The deposition quality was mainly focused on the effect of process parameters and especially the matching of z-increment and single deposition height. Based on the grain size and growth of columnar, the characteristics of microstructures were analyzed. Considering the structural feature of thin-wall, the effect of grain size and phases on the hardness and distribution of hardness were discussed. The effect of grain size, phases and loading direction on the tensile properties were reviewed. The distribution and modification of thermal stress were presented.

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“…Therefore, Sc and Zr elements are very suitable for improving the printability and performance of LDED Al alloys. In addition, the repeated thermal cycle also promotes in situ aging and coarsening of precipitated phases, thereby affecting the mechanical performances [169,170].…”

Section: In-situ Alloyingmentioning

confidence: 99%

Review on laser directed energy deposited aluminum alloys

Liu,

Chen,

Qiu

et al. 2024

Int. J. Extrem. Manuf.

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The lightweight aluminum (Al) alloys have been widely used in frontier fields like aerospace and automotive industries, which attracts great interest in additive manufacturing to process high-value Al parts. As a mainstream additive manufacturing technique, laser directed energy deposition (LDED) shows good scalability to meet requirements for large-format components manufacturing and repairing. However, LDED Al alloys are highly challenging due to the inherent poor printability (e.g., low laser absorption, high oxidation sensitivity and cracking tendency). To further promote the development of LDED high-performance Al alloys, this review gains a deep understanding of the challenges and strategies to improve printability in LDED Al alloys. The porosity, cracking, distortion, inclusions, elements evaporation and resultant inferior mechanical properties (than laser powder bed fusion) are the key challenges in LDED Al alloys. Processing parameter optimizations, in-situ alloy design, reinforcing particle addition and field assistance are the efficient approaches to improve the printability and performance of LDED Al alloys. The underlying correlations between processes, alloy innovation, characteristic microstructures, and achievable performances in LDED Al alloys are discussed. The benchmarking mechanical properties and primary strengthening mechanism of LDED Al alloys are summarized. This review aims to provide a critical and in-depth evaluation of current progress in LDED Al alloys. The future opportunities and perspectives in LDED high-performance Al alloys are also outlooked.

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Ageing response of an Al-Mg-Mn-Sc-Zr alloy processed by laser metal deposition in thin-wall structures

Cited by 18 publications

References 29 publications

Heat Treatment Optimization for a High Strength Al–Mn–Sc Alloy Fabricated by Selective Laser Melting

Heat Treatment Optimization for a High Strength Al–Mn–Sc Alloy Fabricated by Selective Laser Melting

Macroscopic and Microstructural Features of Metal Thin-Wall Fabricated by Laser Material Deposition: A Review

Review on laser directed energy deposited aluminum alloys

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