Microstructures and Mechanical Properties of Al-Mg-Sc-Zr Alloy Additively Manufactured by Laser Direct Energy Deposition

Qian, Hua; Wang, Wenjun; Li, Ruidi; Zhu, Heguo; Lin, Zehuan; Xu, Rong; Yuan, Tiechui; Li, Kai

doi:10.1016/j.cjmeam.2022.100057

Cited by 4 publications

(12 citation statements)

References 31 publications

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“…In-situ alloying of elements in Al alloys during LDED can affect the solidification behavior, grain growth, and precipitation [158]. For instance, adding Sc and Zr has attracted wide attention due to their excellent effects on changing the solidification range, refining microstructures, and precipitate strengthening [31,150,[159][160][161][162]. The maximum solid solubility of Sc and Zr in Al is only 0.35 wt.% and 0.26 wt.%, respectively [163,164], but rapid solidification can increase the amount of Sc and Zr in the Al matrix by several orders of magnitude [164,165].…”

Section: In-situ Alloyingmentioning

confidence: 99%

“…[39]. Sc, Zr, and reinforcement particles are often used to improve the printability and formability of LDED Al-Mg alloys, and the subsequent strength-plasticity synergy in as-built conditions can be improved significantly [150,159,183,207], which can achieve the highest level of strength in the wide series [20,38,119,147,194,209]; Al-Mn alloy [160]; Al-Si alloy [34-36, 59, 67, 68, 76, 113, 145, 204, 217]; Al-Mg alloy [39,120,150,159,183,207]; Al-Mg-Si alloy [218]; Al-Zn alloy [37,64,78,88,96,112,181], Al-Cr alloy [203]), and (b) post-heat-treated (Al-Cu alloy [38,194], Al-Mn alloy [160], Al-Si alloy [36], Al-Mg alloy [120,150], Al-Mg-Si alloy [148,218], and Al-Zn alloy [37,64,96,112,181]).…”

Section: Mechanical Properties Of Al-si Alloysmentioning

confidence: 99%

“…of LDED Al alloys (figures 22(a) and (b)). Hua et al [159] explored LDED Al-9 Mg alloy with high Mg content, which achieved a higher Mg solid solubility, grain refinement (2-30 µm equiaxed grains) and a weak texture. Under this condition, the UTS at the as-built state reached 400 MPa, the highest among the LDED of Al-Mg alloys.…”

Section: Mechanical Properties Of Al-si Alloysmentioning

confidence: 99%

“…Unlike the longitudinal section, the microstructures in the cross-section are close to equiaxed crystals (figure 23(b)). In addition, Hua et al [159] found that the porosity in the longitudinal section and horizontal section was also different. The longitudinal section's porosity was higher, leading to lower elongation (figures 23(c)-(h) and table 6).…”

Section: Mechanical Anisotropy Of Lded Al Alloysmentioning

confidence: 99%

“…In addition, Li et al [145] also proposed that reducing the layer thickness contributed to the formation of equiaxed grains and weakened the orientation preference of Si phases, thus reducing the anisotropy in mechanical properties, as shown in table 6. Generally, the tensile properties along the horizontal direction are better than those along the longitudinal direction due to better metallurgical bonding and even grain size [159].…”

Section: Mechanical Anisotropy Of Lded Al Alloysmentioning

confidence: 99%

See 4 more Smart Citations

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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Section: In-situ Alloyingmentioning

confidence: 99%

Section: Mechanical Properties Of Al-si Alloysmentioning

confidence: 99%

Section: Mechanical Properties Of Al-si Alloysmentioning

confidence: 99%

Section: Mechanical Anisotropy Of Lded Al Alloysmentioning

confidence: 99%

Section: Mechanical Anisotropy Of Lded Al Alloysmentioning

confidence: 99%

See 3 more Smart Citations

Review on laser directed energy deposited aluminum alloys

Liu,

Chen,

Qiu

et al. 2024

Int. J. Extrem. Manuf.

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Microstructure and mechanical properties of hammer-forging assisted wire-arc directed energy deposition AZ91 alloy

Niu,

Li,

et al. 2024

Virtual and Physical Prototyping

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Microstructure and Microhardness of High-Strength Aluminium Alloy Prepared Using High-Speed Laser Fabrication

Wu,

Chen,

et al. 2024

Metals

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As a recently developed high-strength aluminium alloy used specifically for laser additive manufacturing, AlMgMnSc alloy possesses superior mechanical properties and excellent processability. Extreme high-speed laser deposition (EHLD) is a novel surface-modification technique, which is characterised by high depositing speed, rapid cooling, rate and minimal dilution rate. To offer a new method for surface repairing high-strength aluminium alloys, an AlMgMnSc alloy coating, containing two deposition layers, is prepared on a 6061 aluminium-alloy axle using the EHLD technique. Meanwhile, the microstructure, composition distribution, and microhardness variation of the fabricated coating are studied. The results reveal that the coating is dense and crack-free, which is well-bonded with the substrate. Additionally, layer 1 is mainly composed of large columnar and equiaxed grains, while layer 2 consists of a fully equiaxed grain structure with an average grain size of about 4.5 μm. Moreover, the microhardness of the coating (about 104~118 HV) is similar to the substrate (about 105 HV), proving the feasibility of repairing high-strength aluminium alloys using AlMgMnSc alloy powders through the EHLD technique.

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Microstructures and Mechanical Properties of Al-Mg-Sc-Zr Alloy Additively Manufactured by Laser Direct Energy Deposition

Cited by 4 publications

References 31 publications

Review on laser directed energy deposited aluminum alloys

Review on laser directed energy deposited aluminum alloys

Microstructure and mechanical properties of hammer-forging assisted wire-arc directed energy deposition AZ91 alloy

Microstructure and Microhardness of High-Strength Aluminium Alloy Prepared Using High-Speed Laser Fabrication

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