The microstructure regulation and property enhancement of directed energy deposited Al-Zn-Mg-Cu alloy modified with fixed Si fraction and various TiC contents

Li, Lanbo; Luo, Liuxiong; Wu, Ya‐Fen

doi:10.1016/j.mtcomm.2022.105182

Cited by 2 publications

(7 citation statements)

References 38 publications

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“…As observed in figures 22(a) and (b), the mechanical properties of LDED Al-Zn alloys span a large range, in which the UTS ranges 60-400 MPa, with the EL below 10% [37,64,96,112,181]. This is because LDED of Al-Zn alloys has a narrow processing window originating from the high alloying element evaporation probability and high thermal cracking sensitivity Ambient-temperature tensile properties of as-built and post-heat-treated LDED Al alloys [20, 34-39, 59, 64, 67, 68, 78, 88, 96, 112, 113, 119, 120, 145, 147, 148, 150, 159, 160, 181, 183, 194, 203, 204, 207, 209, 217, 218].…”

Section: Mechanical Properties Of Al-zn Alloysmentioning

confidence: 73%

“…Due to the increased laser absorption after adding ex-situ reinforcement particles, the formability of LDED Al alloys is improved prominently. Li et al [181] found that the number of pores significantly decreased with the TiC content increasing from 0.5 wt.% to 2.0 wt.%, as shown in figure 15(i).…”

Section: Ex-situ Reinforcement Particlesmentioning

confidence: 87%

“…[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%

“…Excessive Zr would make it difficult to reach the critical undercooling degree in the low solute density region and challenging to promote new grain nucleation. (ii) Addition of reinforcement particles [37,181] with low thermal conductivity. ZrO 2 [37] and TiC [181] have been reported to strengthen LDED Al-Zn-Mg-Cu-Si alloys.…”

Section: Al Alloy References Alloy Compositionmentioning

confidence: 99%

“…(ii) Addition of reinforcement particles [37,181] with low thermal conductivity. ZrO 2 [37] and TiC [181] have been reported to strengthen LDED Al-Zn-Mg-Cu-Si alloys. ZrO 2 and TiC can increase laser absorption of Al powders, interact with the dislocations and effectively hinder the dislocation motion, thus enhancing the relative density and strength of LDED-processed Al alloys.…”

Section: Al Alloy References Alloy Compositionmentioning

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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