Selective laser melting of 7075 aluminum alloy inoculated by Al–Ti–B: Grain refinement and superior mechanical properties

Huang, Bin; Liu, Yunzhong; Zhou, Zhiguang; Wen, Cheng; Liu, Xiaohui

doi:10.1016/j.vacuum.2022.111030

Cited by 43 publications

(13 citation statements)

References 51 publications

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“…TiB 2 particles have a good crystal orientation relationship with Al, and the lattice mismatch is less than 5 % [24] , which can act as the nucleus for Al solidification and inhibit grain growth [25] . The relationship between the number of nucleation sites and grain size can be described as [18] , [26] :

…”

Section: Discussionmentioning

confidence: 99%

“…However, not all TiB 2 particles will become α-Al nuclei since there is a critical velocity at the solidification front below which particles will be pushed to the advancing front and agglomerate at the grain boundaries [27] . Although the TiB 2 particles at the grain boundaries can play the role of Zener pinning particles, which can prevent the migration of grain boundaries and further inhibit the growth of α-Al grains [24] , the TiB 2 clusters will hinder the flow of solute atoms such as Cu. In addition, the Al 2 Cu phase and TiB 2 particles have good wettability.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructural evolution and mechanical properties of TiB2/2195 composites fabricated by ultrasonic-assisted in-situ casting

Xie

Jiang²,

Li³

et al. 2022

Ultrasonics Sonochemistry

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…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Microstructural evolution and mechanical properties of TiB2/2195 composites fabricated by ultrasonic-assisted in-situ casting

Xie

Jiang²,

Li³

et al. 2022

Ultrasonics Sonochemistry

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“…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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“…Aluminum alloys, known for superior castability, lightweight, low thermal expansion coefficient, and excellent corrosion resistance, are widely used in the automotive industry [1][2][3]. Among them, A356 alloy is a commonly used material for wheel manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al-Sr-Y intermediate alloy on microstructure and mechanical properties of A356 alloy

Huang,

Li,

Yuan

et al. 2024

Mater. Res. Express

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In this experiment, an intermediate alloy (Al-3Sr-8Y) that can refine and modify A356 alloy simultaneously was developed, and the synergistic effect of Sr and Y on the microstructure and mechanical properties of A356 alloy was investigated. The results show that when the content of Al-3Sr-8Y intermediate alloy reaches 0.3 wt.%, the morphology of α-Al dendrites is significantly refined and the secondary dendrite arm spacing (SDAS) was significantly reduced. Moreover, the morphology of eutectic Si transforms from acicular to small fibrous, and the average area and aspect ratio of eutectic Si decrease to 0.81 μm2, and 2.01. This change is caused by the twin plane re-entrant edge (TPRE) poisoning mechanism, where the addition of Al-3Sr-8Y can poison the intrinsic growth position of the Si phase, reduce the growth rate of the Si phase, promote isotropic growth, and achieve a highly branched morphology of the Si phase to form a fibrous structure. Due to the excellent synergistic effect of Sr and Y, the tensile strength and elongation of the alloy reached the maximum values of 303.5 MPa and 9.5% when 0.3 wt.% Al-3Sr-8Y was added after heat treatment, which is an increase of 18.2% and 86.3% compared with the untreated A356 alloy, respectively.

show abstract

Selective laser melting of 7075 aluminum alloy inoculated by Al–Ti–B: Grain refinement and superior mechanical properties

Cited by 43 publications

References 51 publications

Microstructural evolution and mechanical properties of TiB2/2195 composites fabricated by ultrasonic-assisted in-situ casting

Microstructural evolution and mechanical properties of TiB2/2195 composites fabricated by ultrasonic-assisted in-situ casting

Additively Manufactured High-Strength Aluminum Alloys: A Review

Effect of Al-Sr-Y intermediate alloy on microstructure and mechanical properties of A356 alloy

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