Effect of TiB2 on the Corrosion Resistance Behavior of In Situ Al Composites

Kumar, Prashant; Kavimani, V.; Prakash, K. Soorya; Krishna, V. Murali; Kumar, Girendra

doi:10.1007/s40962-019-00330-3

Cited by 36 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CNTs possess poor water wettability and sturdy corrosion resistance; galvanic corrosion is observed between the magnesium matrix and CNTs [57]. Adding TiB 2 considerably improves the cast composites' resistance to corrosion because of grain refinement [58]. For increased corrosion resistance, the Icorr value has to be lower.…”

Section: Resultsmentioning

confidence: 99%

Characterization and strengthening mechanism of CNT/TiB₂ particulates added AZ91D composites

velmurugan

Mohan

2023

Mater. Res. Express

View full text Add to dashboard Cite

In the current work, magnesium (AZ91D) matrix composites reinforced with different weight fractions (5, 10, and 15%) of titanium diboride (TiB2) and 1.5 wt.% percent carbon nanotubes (CNTs) are fabricated using stir casting. The improvements in mechanical, wear and corrosion resistance properties are evaluated as per ASTM guidelines. The synergistic strengthening effect of TiB2 and CNT is also studied. It was discovered that the AZ91D/(1.5CNT-10TiB2) composite outperformed other magnesium matrix composites in terms of strength and ductility. Experimental characterization and quantity analysis revealed that the load transfer process of CNT and thermal mismatch, grain refinement are the primary factors leading to the composite's increased tensile strength. Porosity tends to increase as a result of variance in thermal expansion coefficient of particles and matrix material, Orowan strengthening mechanism plays a prominent role towards enhancement of tensile strength. Because of the influence of synergistic strengthening, micro particles TiB2 increased the proportion of load transmission mechanisms and thermal mismatch facilitated the homogenous distribution of CNTs. Wear resistance and corrosion resistance increases with inclusion of CNTs and TiB2 content. Abrasive type wear mechanism is seen from the SEM image and the wear craters are also seen in all the SEM images, adding TiB2 considerably improves the cast composites resistance to corrosion because of grain refinement. Higher addition of TiB2 influences higher pitting corrosion due to poor grain refinement.

show abstract

Section: Resultsmentioning

confidence: 99%

Characterization and strengthening mechanism of CNT/TiB₂ particulates added AZ91D composites

velmurugan

Mohan

2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…To form the titanium diboride reinforcement by flux assisted synthesis using stir casting technique, the appropriate amount of halide salts Potassium hexafluorotitanate (K2TiF6) and Potassium tetrafluoroborate (KBF4) were accurately weighed based on stoichiometric calculations, mixed, preheated and added into the molten metal [17]. The exothermic reaction occurs in the melt due to the addition of halide salts induces the formation of titanium diboride in the molten slurry [18,19]. To assist the reaction, the formation of TiB2 and uniform distribution of TiB2, the melt was stirred in a regular interval of time of 5 minutes till the end of reaction which is observed by the absence of lightning sparks.…”

Section: Methodsmentioning

confidence: 99%

“…Shen et al formed in-situ Titanium diboride in Al-Cu-Li matrix and observed improvement in the strength [16]. Likewise, the insitu titanium diboride was formed through the flux assisted technique with the aluminium as matrix and found the improved the mechanical strength, tribological strength and corrosion resistance [17][18][19]. Apart from TiB2, some of the most common insitu reinforcement synthesied through the flux assited technique are ZrB2, TiC, Al2O3, Al3Ti, and MgAl2O4 [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of In-Situ AA8011-TiB2 Composites Produced by Flux Assisted Synthesis

Munivenkatappan¹,

Shanmugam²,

Anandakrishnan³

2020

ACSM

View full text Add to dashboard Cite

In-situ aluminium alloy 8011 matrix composites containing different weight percentages of titanium diboride were synthesized by flux assisted synthesis using stir casting technique. The metallurgy of the in-situ AA8011-TiB2 composites was analyzed using X-ray diffractometer, scanning electron microscope and energy dispersive spectroscope to disseminate the formation and distribution of reinforcements. Density, microhardness and tensile strength of cast AA8011 and in-situ AA8011-TiB2 composites were measured and analyzed. The in-situ formed TiB2 reinforcements showed the maximum hardness of 55.03 Hv and the maximum tensile strength of 158.2 MPa for 8 wt. % of TiB2 whereas the percentage elongation of 7.2% is observed at 4 wt. % of TiB2. Further, the fractography analysis performed on the fractured tensile samples and the mechanism of failures were identified and reported.

show abstract

“…Because of the serious segregation of the materials at these two preparation temperatures, the crack propagation is hindered less, the expansion is faster, which leads to more serious wear and larger debris shedding. When the crack extends to a certain length, the material between the crack and the surface will peel off in the form of flake wear debris [30][31][32][33][34][35][36][37], so the wear mechanism at this time is peeling wear.…”

Section: Friction and Wear Properties Of In-situ Formed Aluminum Matrmentioning

confidence: 99%

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

Pinyi

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

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.

show abstract

Effect of TiB2 on the Corrosion Resistance Behavior of In Situ Al Composites

Cited by 36 publications

References 22 publications

Characterization and strengthening mechanism of CNT/TiB₂ particulates added AZ91D composites

Characterization and strengthening mechanism of CNT/TiB₂ particulates added AZ91D composites

Synthesis and Characterization of In-Situ AA8011-TiB2 Composites Produced by Flux Assisted Synthesis

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

Contact Info

Product

Resources

About

Effect of TiB2 on the Corrosion Resistance Behavior of In Situ Al Composites

Cited by 36 publications

References 22 publications

Characterization and strengthening mechanism of CNT/TiB2 particulates added AZ91D composites

Characterization and strengthening mechanism of CNT/TiB2 particulates added AZ91D composites

Synthesis and Characterization of In-Situ AA8011-TiB2 Composites Produced by Flux Assisted Synthesis

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

Contact Info

Product

Resources

About

Characterization and strengthening mechanism of CNT/TiB₂ particulates added AZ91D composites

Characterization and strengthening mechanism of CNT/TiB₂ particulates added AZ91D composites

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