Microstructures of in-situ TiB2/7055Al Composites by the Ultrasonic and Magnetic Coupled Field

Jiao, Lei; Zhao, Yutao; Wu, Yifei; Chen, Dengbin; Wang, Xiaolu

doi:10.1016/s1875-5372(14)60042-4

Cited by 17 publications

(9 citation statements)

References 7 publications

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“…The A356 was heated in a crucible resistance furnace to the set reaction temperature of 710°C, 750°C, 770°C and 790°C. In order to avoid the floating of salt, the salt mixture was introduced into A356 melt by bell graphite immersion method to react with 3 wt% salt powder [26][27][28][29]. The reaction equation is:…”

Section: Methodsmentioning

confidence: 99%

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Pinyi

et al. 2020

Mater. Res. Express

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A1 3 Zr/A356 Composite was prepared by in-situ reaction of K 2 ZrF 6 powder and cast aluminum A356 melt at different temperatures (710°C, 750°C, 770°C, 790°C). The effect of different melting temperature on the morphology of Al 3 Zr particles was studied, and the sliding friction and wear properties of the composites were studied by wear test. It can be seen from the x-ray diffractometer (XRD) that the prepared composite material consists of A1 3 Zr and ɑ-Al, and also has a small part of the aluminum-silicon eutectic phase; SEM analysis shows that the particles of in-situ reinforced phase are fine, With the increase of temperature, the morphology of A1 3 Zr reinforced phase changed from block to needle and strip, and the particle distribution of the reinforced phase was uniform and well dispersed in the matrix at 750°C. TEM experiments show that the reinforced phase exists at 750°C and has a good combination with the matrix, which plays a very good role in particle reinforcement Friction and wear experiments show that the different preparation temperature results in different phase morphology. The reinforced phase particles existing on the surface of composites at 710°C and 750°C bear most of the friction, so the friction coefficient of the composites is larger at these preparation temperature, and the main wear modes are oxidation wear and abrasive wear. The friction coefficient of the composites prepared at 770°C and 790°C is small, and the wear modes are mainly delamination wear and oxidation wear. When the preparation temperature is 750°C, the wear resistance of the composites is the best.

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Section: Methodsmentioning

confidence: 99%

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Pinyi

et al. 2020

Mater. Res. Express

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“…Then the as-cast endogenous nanoparticles reinforced aluminum matrix composites were obtained, and the size of the casting was 145×100×18 mm 3 . According to the previous research basis and relevant literature [13][14][15] of our research group, the parameters of the magnetic field and ultrasonic field were shown in table 1.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…When the magnetic field is applied in situ reaction process, the working mechanism [23] is mainly based on two aspects: (1) the interaction between magnetic field and metal liquid leads to the appearance of induced current; (2) magnetic field interacts with current-carrying metal liquid to form electromagnetic force. When a current of density J passes in the metal liquid, a magnetic field with a magnetic induction strength of B is perpendicular to the current density [24], and a Lorentz force F EM , which can be described by the following equation [25] will be apply on the metal liquid:…”

Section: Effects Of Magnetic and Ultrasonic Fields In Different Stagementioning

confidence: 99%

Microstructures and properties of in-situ (ZrB₂ + Al₂O₃)_np/AA6111 composites synthesized under magnetic and ultrasonic fields

Xia¹,

Zhao²,

Chen³

et al. 2020

Mater. Res. Express

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ZrB 2 and Al 2 O 3 nanoparticle-reinforced aluminum matrix composites were successfully prepared by in situ chemical reaction of the Al-Na 2 B 4 O 7 -K 2 ZrF 6 system with magnetic field applied in the in situ reaction and ultrasonic field introduced in solidification. The results indicated that the optimized magnetic frequency was 10 Hz, and the ultrasonic power was 1.0 kW. XRD analysis showed that ZrB 2 and Al 2 O 3 nanoparticles have been obtained. The smaller clusters were evenly distributed in the matrix. ZrB 2 and Al 2 O 3 nanoparticles were dispersed and uniformly distributed. The average size of particles and grain size of (ZrB 2 +Al 2 O 3 ) np /AA6111 composites were refined to 45±10 nm and 50.4±12 μm, respectively. The maximum Vickers hardness, tensile strength, yield strength and elongation of the composites synthesized under the optimized magnetic and ultrasonic fields were 142.2 HV, 355.4 MPa, 259.4 MPa and 22.4%, which were 1.34, 1.36, 1.35 and 1.33 times higher than that of AA6111 alloy, respectively.

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“…However, the disadvantage of AMCs is the considerable difference in physical and chemical properties between the reinforcing phase (RP) and the matrix alloy, leading to poor welding performance. [ 1–11 ] Friction stir welding (FSW) is a new solid‐phase bonding approach, with advantages such as yielding fewer cracks, lower porosity, and brittleness compared with the traditional melt welding. [ 12–26 ] Benavides et al [ 27 ] studied FSW experiments on the 2024 aluminum alloy; the results showed that welding began at −30 °C but ended at below 140 °C and the weld seam comprised equiaxed grains with an average size of 0.8 μm, in sharp contrast to the 10 μm base‐metal (BM) grains.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ultrahigh‐Speed Friction‐Stir‐Welded Joints of In Situ Al₃Zr Particle‐Reinforced Aluminum Matrix Composite Sheets

Pinyi

Qiao

et al. 2021

Adv Eng Mater

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Herein, in situ Al3Zr + 6082Al aluminum matrix composite sheets subjected to ultrahigh‐speed friction stir welding (FSW) at welding and stirring‐head rotation speeds of 200 mm min−1 and 11 000, 13 000, or 15 000 rpm, respectively, are focused on. X‐ray diffraction, electron microscopy, energy‐dispersive spectrometry, microhardness testing, and tensile testing are used to investigate the microstructures and mechanical properties of the welds. The weld nugget zone (NZ) of the high‐speed FSW joint of the Al3Zr + 6082Al matrix composite sheet comprises mainly equiaxed recrystallized grains, the thermomechanically affected zone comprises equiaxed recrystallized grains and elongated plastically deformed grains, and the heat‐affected zone comprises recrystallized grains. Results show that the FSW joint formed at 13 000 rpm and 200 mm min−1 is extremely well formed and has a compact and uniform structure. The microhardness of the 13 000 rpm FSW joint is highest at an NZ hardness and tensile strength of 128.08 HV and 153.7 MPa (87% of that of the base metal), respectively.

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Microstructures of in-situ TiB2/7055Al Composites by the Ultrasonic and Magnetic Coupled Field

Cited by 17 publications

References 7 publications

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Microstructures and properties of in-situ (ZrB₂ + Al₂O₃)_np/AA6111 composites synthesized under magnetic and ultrasonic fields

Microstructure and Mechanical Properties of Ultrahigh‐Speed Friction‐Stir‐Welded Joints of In Situ Al₃Zr Particle‐Reinforced Aluminum Matrix Composite Sheets

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Microstructures of in-situ TiB2/7055Al Composites by the Ultrasonic and Magnetic Coupled Field

Cited by 17 publications

References 7 publications

Microstructure and tribological properties of in-situ formed Al3Zr/A356 composite

Microstructure and tribological properties of in-situ formed Al3Zr/A356 composite

Microstructures and properties of in-situ (ZrB2 + Al2O3)np/AA6111 composites synthesized under magnetic and ultrasonic fields

Microstructure and Mechanical Properties of Ultrahigh‐Speed Friction‐Stir‐Welded Joints of In Situ Al3Zr Particle‐Reinforced Aluminum Matrix Composite Sheets

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Product

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Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Microstructures and properties of in-situ (ZrB₂ + Al₂O₃)_np/AA6111 composites synthesized under magnetic and ultrasonic fields

Microstructure and Mechanical Properties of Ultrahigh‐Speed Friction‐Stir‐Welded Joints of In Situ Al₃Zr Particle‐Reinforced Aluminum Matrix Composite Sheets