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

Xie, Ziming; Jiang, Ripeng; Li, Xiaoqian; Zhang, Lihua; Li, Anqing; He, Ze

doi:10.1016/j.ultsonch.2022.106203

Cited by 21 publications

(9 citation statements)

References 61 publications

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“…In turn, it can make the eutectic phase uniformly distributed in the solidified tissue, and the area fraction of the coarse eutectic phase is reduced. According to the Tiller formula [31,37]: where is the Cu concentration of the Al melt at distance x from the solid–liquid interface, is the original concentration of solute elements, is the equilibrium partition coefficient, R is the solid–liquid interface propulsion velocity, D is the solute diffusion coefficient, x is the distance from the interface. The solute elements with USDC diffuse rapidly at the solid–liquid interface, which shortens the distance between and , the concentration of Cu elements (near the liquid phase line) in the liquid phase decreases, and greatly reducing the bias caused by the concentration difference.…”

Section: Discussionmentioning

confidence: 99%

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Jiang

et al. 2023

Materials Science and Technology

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High-intensity ultrasonic melt treatment technique plays a key role in improving the performance of large-scale 2219 alloy ingot (Φ630 mm × 4500 mm). In this current paper, ultrasonic treatment-assisted casting techniques were developed and applied to manufacture large-scale 2219 aluminium (Al) alloy ingot in direct chill casting (DC). The industry-level experiments revealed that the α-Al grains of the ingot with ultrasonic (USDC) were refined, the area fraction of the coarse Al2Cu eutectic phase showed a decreasing trend, and the mechanical properties were lightly improved than without ultrasonic ingot (DC). Based on the present results and previous proposed hypotheses, the synergistic effects of cavitation and acoustic streaming were considered as the dominant mechanisms of USDC.

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Section: Discussionmentioning

confidence: 99%

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Jiang

et al. 2023

Materials Science and Technology

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“…Some KBF 4 remains in the aluminum melt and becomes impurities. At this time, the amount of rods like TiAl 3 decreased, but there is a group of impurities that are not wetting with the aluminum matrix [9,44]. It is inferred that the presence of excessive KBF 4 leads to casting defects that seriously weaken the mechanical properties of composite.…”

Section: Effect Of Holding Time On Mechanical Properties Of In Situ T...mentioning

confidence: 99%

“…Metal matrix composites (MMCs) with excellent comprehensive properties have become one of the important research directions of advanced materials in the world [5][6][7]. The main representative of metal matrix composites is aluminum matrix composites (AMCs) [8][9][10][11][12][13][14][15][16][17]. Particle reinforced aluminum matrix composites have excellent physical and mechanical properties: high specific strength, high yield strength, good fatigue resistance, low thermal expansion coefficient, good thermal stability and wear resistance [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…The tensile strength and yield strength are increased by 46% and 85% respectively. Zi ming Xie [9] used ultrasonic stirring method in preparing in situ 2 wt% TiB 2 /2195 composites. The results show that ultrasonic treatment can effectively reduce the agglomeration of TiB 2 particles and can effectively reduce the coarsening of the second phase, make TiB 2 particles uniformly distributed in the grains, and refine the α-Al dendrite.…”

Section: Introductionmentioning

confidence: 99%

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Effect of holding time and Ti/B molar ratio on microstructure and mechanical properties of in-situ TiB₂/Al composites fabricated by mixed salt reaction

Xie¹,

Cao²

2023

Mater. Res. Express

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In this study, in-situ TiB 2 /Al composites is fabricated by K 2 TiF 6 and KBF 4systems. The effects of process parameters on the size, distribution and morphologyof in-situ TiB 2 particles, as well as the microstructure and mechanical properties of thecomposite is analyzed. When the mixed salts is added at 750 °C, TiB 2 particles areshort rods. When the temperature is higher than 825 °C, TiB 2 particles are cubiccolumns and hexagonal columns. When the reaction temperature is 825 °C, the grainrefinement of the composite is most obviously. When the holding time is 80 min, TiB 2particles are uniformly distributed in the matrix and the size is less than 2 μm. Theultimate tensile strength, yield strength and elongation of the composite reach themaximum values of 230 MPa, 125 MPa and 9.5%. When the holding time is 110 min,TiB 2 particles agglomerate at the grain boundary, and the mechanical properties of thecomposites decrease. When the Ti/B molar ratio is 1/1, in addition to forming TiB 2particles, large size hard brittle phase TiAl 3 appear in the microstructure. When theTi/B molar ratio is 1/2.2, the formation of hard brittle phase TiAl 3 can be inhibited,TiB 2 particles are uniformly distributed in the matrix and the grain refinement is mostobviously. The ultimate tensile strength, yield strength and elongation of thecomposite reach the maximum values of 225 MPa, 110 MPa and 8.5%. When the Ti/Bmolar ratio is 1/3, the unreacted residual mixed salts appear in the microstructure ofthe composite, and the residual mixed salts impurities exist at the interface betweenTiB 2 particles and the matrix, so reduce the mechanical properties of the composite.

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“…The aluminum alloy was completely melted, and then stirred to remove the oxide layer from the surface of the aluminum melt. The resistance furnace settings were then adjusted to lower the melt temperature to 700 °C for insulation [26,27]. Figure 1 shows taht the titanium alloy sample block is placed at the bottom of the crucible and the sample is removed every 12 min, which is mainly used to study the differences in corrosion weight loss, roughness changes, and reaction layer growth of titanium alloys with different roughness levels in an aluminum melt environment at 700 °C.…”

Section: Sample Preparationmentioning

confidence: 99%

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

Yang,

Zhang,

Liu

et al. 2023

Mater. Res. Express

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Titanium alloy radiation rods have excellent physical and chemical properties compared to other materials, and are commonly used for ultrasonic casting of 2A14 aluminum alloy. However, titanium alloys are chemically corroded in high-temperature aluminum melts for a long time, making it difficult to precisely regulate the elemental composition during casting. In order to better understand the high-temperature chemical corrosion mechanism of titanium alloy radiation rods, this research looks into the corrosion morphology, weight loss, surface roughness, and reaction layer. The study's findings suggest that the rate of chemical corrosion of titanium alloy in high-temperature aluminum melt is often inversely correlated with the degree of roughness, with the degree of roughness changing nonlinearly during the corrosion process. Titanium alloy weight loss rates with roughness Ra0.4μm, Ra7.2μm, Ra9.5μm and Ra9.8μm are 0.16mg per minute, 0.25mg per minute, 0.37mg per minute and 0.29mg per minute, respectively. The corrosion product of the chemical corrosion process is TiAl3, which is granular. Under varying roughness conditions, the solid-liquid interface of Al/Ti emerges reactants after 4 minutes, and the TiAl3 reaction layer arises after 12 minutes. Furthermore, the reaction layer with little roughness is flat and compact, whereas the reaction layer with great roughness is loose and contains many faults. At the same time, the growth rate of the reaction layer decreases slightly. And the greater the surface roughness, the greater the TiAl3 reaction layer grows at the titanium alloy matrix.

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

Cited by 21 publications

References 61 publications

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Effect of holding time and Ti/B molar ratio on microstructure and mechanical properties of in-situ TiB₂/Al composites fabricated by mixed salt reaction

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

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

Cited by 21 publications

References 61 publications

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Effect of holding time and Ti/B molar ratio on microstructure and mechanical properties of in-situ TiB2/Al composites fabricated by mixed salt reaction

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

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Effect of holding time and Ti/B molar ratio on microstructure and mechanical properties of in-situ TiB₂/Al composites fabricated by mixed salt reaction