Aging responses of an Al-Cu alloy fabricated by selective laser melting

Hu, Zhiheng; Qi, Ying; Gao, Shubo; Nie, Xiaojia; Zhang, Hu; Zhu, Haihong; Zeng, Xiaoyan

doi:10.1016/j.addma.2020.101635

Cited by 9 publications

(6 citation statements)

References 71 publications

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“…The density of intragrain dislocations (mostly perfect and Frank type) are remarkably close to the GND densities estimated in the rapid solidification PFC-AE simulations, as summarized in table 3. These dislocation densities are 10-20 times larger than the listed experimentally measured dislocation densities [20,[63][64][65][66]. As discussed more thoroughly in the Introduction section, there are several sources of error in the experimental evaluation of dislocation densities that can, to some extent, explain the discrepancy between the MD and PFC-AE simulations and the experiments.…”

Section: Discussionmentioning

confidence: 87%

“…and transmission electron microscopy-based line-intercept measurements (TEM line-inter.). simulation results in this work unit perfect Frank Shockley others MD pure Al 1.9 1.1 41 0.42

MD Al–1 at%Cu 1.7 1.2 45 0.39

PFC pure Al, low V 0.1 (GND)

PFC pure Al, high V 1.7 (GND)

PF–CP Al–4.5at%Cu 0.004–0.005 (SSD)

past experimental results EBSD, AM Al-Cu [ 63 ] 0.072 (GND)

XRD, melt spun Al 7075 [ 64 ] 0.057 (total)

XRD, melt spun Al 5083 [ 65 ] 0.14 (total)

…”

Section: Resultsmentioning

confidence: 97%

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Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium–copper alloys

Pinomaa

Lindroos

Jreidini

et al. 2022

Phil. Trans. R. Soc. A.

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Rapid solidification leads to unique microstructural features, where a less studied topic is the formation of various crystalline defects, including high dislocation densities, as well as gradients and splitting of the crystalline orientation. As these defects critically affect the material’s mechanical properties and performance features, it is important to understand the defect formation mechanisms, and how they depend on the solidification conditions and alloying. To illuminate the formation mechanisms of the rapid solidification induced crystalline defects, we conduct a multiscale modelling analysis consisting of bond-order potential-based molecular dynamics (MD), phase field crystal-based amplitude expansion simulations, and sequentially coupled phase field–crystal plasticity simulations. The resulting dislocation densities are quantified and compared to past experiments. The atomistic approaches (MD, PFC) can be used to calibrate continuum level crystal plasticity models, and the framework adds mechanistic insights arising from the multiscale analysis. This article is part of the theme issue ‘Transport phenomena in complex systems (part 2)’.

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Section: Discussionmentioning

confidence: 87%

“…and transmission electron microscopy-based line-intercept measurements (TEM line-inter.). simulation results in this work unit perfect Frank Shockley others MD pure Al 1.9 1.1 41 0.42

MD Al–1 at%Cu 1.7 1.2 45 0.39

PFC pure Al, low V 0.1 (GND)

PFC pure Al, high V 1.7 (GND)

PF–CP Al–4.5at%Cu 0.004–0.005 (SSD)

past experimental results EBSD, AM Al-Cu [ 63 ] 0.072 (GND)

XRD, melt spun Al 7075 [ 64 ] 0.057 (total)

XRD, melt spun Al 5083 [ 65 ] 0.14 (total)

…”

Section: Resultsmentioning

confidence: 97%

Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium–copper alloys

Pinomaa

Lindroos

Jreidini

et al. 2022

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…The density of intragrain dislocations (mostly perfect and Frank type) are remarkably close to the GND densities estimated in the rapid solidification PFC-AE simulations, as summarized in Table 3. These dislocation densities are 10-20 times larger than the listed experimentally measured dislocation densities [67,68,66,69,20]. As discussed more thoroughly in the Introduction section, there are several sources of error in the experimental evaluation of dislocation densities that can, to some extent, explain the discrepancy between the MD and PFC-AE simulations and the experiments.…”

Section: Discussionmentioning

confidence: 88%

“…), and transmission electron microscopy based line-intercept measurements (TEM line-inter.). [66] 0.072 (GND) 10 15 m −2 XRD, Melt spun Al 7075 [67] 0.057 (Total) 10 15 m −2 XRD, Melt spun Al 5083 [68] 0.14 (Total) 10 15 m −2 XRD, AM Al-Si-Mg [20] 0.92 (Total) 10 15 m −2 Neutron diffr., AM Al-Si-Mg [16] 0.16-0.50 (Total) 10 15 m −2 TEM line-inter., AM Al-Si-Mg [69] 0.11-0.31 (Total) 10 15 m −2 aluminium was considered in the PFC simulations. Interaction between copper segregation and defect structures would be interesting to consider on diffusive time scales in PFC simulations, in order to better understand the emergence of pre-precipitates in rapid aluminium alloys.…”

Section: Discussionmentioning

confidence: 99%

Multiscale analysis of crystal defect formation in rapid solidification of pure aluminium and aluminium-copper alloys

Pinomaa,

Lindroos,

Jreidini

et al. 2021

Preprint

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Rapid solidification leads to unique microstructural features, where a less studied topic is the formation of various crystalline defects, including high dislocation densities, as well as gradients and splitting of the crystalline orientation. As these defects critically affect the material's mechanical properties and performance features, it is important to understand the defect formation mechanisms, and how they depend on the solidification conditions and alloying. To illuminate the formation mechanisms of the rapid solidification induced crystalline defects, we conduct a multiscale modeling analysis consisting of bond-order potential based molecular dynamics (MD), phase field crystal based amplitude expansion (PFC-AE) simulations, and sequentially coupled phase field -crystal plasticity (PF-CP) simulations. The resulting dislocation densities are quantified and compared to past experiments. The atomistic approaches (MD, PFC) can be used to calibrate continuum level crystal plasticity models, and the framework adds mechanistic insights arising from the multiscale analysis.

show abstract

“…Alloying element-wise tensile yield strength and elongation of selected high-strength alloys [11,14,38,[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57]. TE-transition element(s), AB-as-built, SA-solution treated and aged, DA-Direct aged.…”

Section: Figurementioning

confidence: 99%

Additively Manufactured High-Strength Aluminum Alloys: A Review

Zafar¹,

Reis²,

Vieira³

et al. 2024

Recent Advancements in Aluminum Alloys

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This chapter summarizes the recent advances in additive manufacturing of high-strength aluminum alloys, the challenges of printability, and defects in their builds. It further intends to provide an overview of the state of the art by outlining potential strategies for the fabrication of bulk products using these alloys without cracking. These strategies include identifying a suitable processing window of additive manufacturing using metallic powders of conventional high-strength aluminum alloys, pre-alloying the powders, and developing advanced aluminum-based composites with reinforcements introduced either by in situ or ex situ methods. The resulting microstructures and the relationship between these alloys’ microstructure and mechanical properties have been discussed. Since post-processing is inevitable in several critical applications, the chapter concludes with a brief account of post-manufacturing heat treatment processes of additively manufactured aluminum alloys.

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Aging responses of an Al-Cu alloy fabricated by selective laser melting

Cited by 9 publications

References 71 publications

Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium–copper alloys

Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium–copper alloys

Multiscale analysis of crystal defect formation in rapid solidification of pure aluminium and aluminium-copper alloys

Additively Manufactured High-Strength Aluminum Alloys: A Review

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