Effect of varying TiB2 reinforcement and its ageing behaviour on tensile and hardness properties of in-situ Al-4.5%Cu-xTiB2 composite

Mozammil, Shaik; Karloopia, Jimmy; Verma, Raviraj; Jha, Pradeep Kumar

doi:10.1016/j.jallcom.2019.04.137

Cited by 81 publications

(18 citation statements)

References 31 publications

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“…7 Aluminum composites possessing in situ TiC and TiB 2 reinforcements are gaining enough attention lately because of its high hardness, elastic modulus and resistance to wear. [8][9][10] A reduction in inter dendritic arm spacing has also been found in the in situ reinforcement. During the solidification of base alloy, these reinforcing phase acts as a nucleation sites for the growth of dendritic arms, hence improves the wettability of the reinforcing phase.…”

Section: Introductionmentioning

confidence: 73%

Microstructural characterization and experimental investigations into two body abrasive wear behavior of Al-7079/TiC in-situ metal matrix composites

Mahapatra

Mulik

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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High strength Al-7079 aluminum metal-matrix composites with 5, 7 and 9 wt.% of TiC particulate reinforcement were procured by in-situ melt reaction method. Scanning electron microscopy (SEM) and XRD analysis were conducted in order to confirm the presence of titanium carbide (TiC) particles and homogeneity inside the aluminum matrix. The parameters like applied load (9.8–29.4 N), sliding distance (1000–2000 m), sliding velocity (1.5 m/s) and SiC-P-600 grit paper (25 µm) were used in this study. The influence of sliding distance, applied load and wt.% of (TiC) reinforcement on in-situ Al-7079 under two body abrasion was investigated. Further, the obtained results were compared with the base Al-7079 alloy. It was examined that, the in-situ reinforced composites exhibited significantly greater wear resistance of 20–60% compared to conventional as cast Al-7079 base matrix. Experimental results confirmed that the wt.% of TiC and sliding distance had higher influence on coefficient of friction and the weight loss was highly affected by the applied load. Further the wear mechanisms involved in the worn surfaces were demonstrated through atomic force microscopy and SEM analysis throughout the surfaces.

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Section: Introductionmentioning

confidence: 73%

Microstructural characterization and experimental investigations into two body abrasive wear behavior of Al-7079/TiC in-situ metal matrix composites

Mahapatra

Mulik

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The utility measure for the rate of material removal is calculated using equation 9, whereas overcutting and delamination are computed using equation (10). Furthermore, the regret measure is estimated using equation (11). The VIKOR index is calculated by inserting the utility and regret measure values into equation 12(see Table 4).…”

Section: Resultsmentioning

confidence: 99%

“…10 Not long ago, the synthesis of aluminium composites reinforced with TiB 2 using K 2 TiF 6 -KBF 4 -aluminium melt reactions and the evaluation of mechanical properties under various treating conditions received the attention of researchers worldwide. [11][12][13] AA6061-TiB 2 composites have several beneficial effects. For example, the TiB 2 particulates act as a diverse nucleation region and facilitate the fine grain size of aluminium.…”

Section: Introductionmentioning

confidence: 99%

Multi-response optimization of electrochemical machining parameters in the micro-drilling of AA6061-TiB₂in situ composites using the Entropy–VIKOR method

Chandrasekhar

Prasad

2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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This article describes the multi-response optimization of electrochemical machining operating parameters such as voltage, concentration of the electrolyte, and current to maximize the rate of material removal in addition to minimize the over cut and delamination at the same time in micro-drilling of AA6061-TiB2 in situ composite. A novel Entropy–VIKOR method is applied to handle such mutually conflicting responses. The weight of each response is computed from the entropy method, and VIKOR method is used to rank the various levels of parameters. This method yields the combination of 2 mol of electrolyte concentration, 16 V of applied voltage, and 4 A of current as optimal parameters to minimize the over cut and delamination in addition to maximize the rate of material removal at the same time. This optimal process-governing parameters satisfied the conditions for compromising solution such as acceptable advantage and acceptable stability condition. The response graph illustrates that, of the parameters investigated, electrolyte concentration has the greatest effect on the VIKOR index, followed by applied voltage and current. Scanning electron microscopic analysis illustrates that the radius of the hole is equal throughout the periphery, except for one instance of micro-delamination.

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“…In the case of ceramic-reinforced metal matrix composites, when tension is applied in the vertical direction to composites in which soft Al, having low strength, is present, the material stretches, and fractures proceed as defects are formed at interface between reinforcements and the matrix. If this interface is not sound, the reinforcements-matrix interface plays a major role in the formation of defects such as voids [31]. Therefore, composites having poor interfaces may exhibit poor mechanical properties due to interfacial delamination.…”

Section: Mechanical Properties Of Tib 2 -Al1050 Compositesmentioning

confidence: 99%

Fabrication of TiB2–Al1050 Composites with Improved Microstructural and Mechanical Properties by a Liquid Pressing Infiltration Process

Park

Lee

et al. 2020

Materials

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This study was conducted on titanium diboride (TiB2) reinforced Al metal matrix composites (MMCs) with improved properties using a TiB2 and aluminum (Al) 1050 alloy. Al composites reinforced with fine TiB2 at volume ratios of more than 60% were successfully fabricated via the liquid pressing infiltration (LPI) process, which can be used to apply gas pressure at a high temperature. The microstructure of the TiB2–Al composite fabricated at 1000 °C with pressurization of 10 bar for 1 h showed that molten Al effectively infiltrated into the high volume-fraction TiB2 preform due to the improved wettability and external gas pressurization. In addition, the interface of TiB2 and Al not only had no cracks or pores but also had no brittle intermetallic compounds. In conclusion, TiB2–Al composite, which has a sound microstructure without defects, has improved mechanical properties, such as hardness and strength, due to effective load transfer from the Al matrix to the fine TiB2 reinforcement.

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Effect of varying TiB2 reinforcement and its ageing behaviour on tensile and hardness properties of in-situ Al-4.5%Cu-xTiB2 composite

Cited by 81 publications

References 31 publications

Microstructural characterization and experimental investigations into two body abrasive wear behavior of Al-7079/TiC in-situ metal matrix composites

Microstructural characterization and experimental investigations into two body abrasive wear behavior of Al-7079/TiC in-situ metal matrix composites

Multi-response optimization of electrochemical machining parameters in the micro-drilling of AA6061-TiB₂in situ composites using the Entropy–VIKOR method

Fabrication of TiB2–Al1050 Composites with Improved Microstructural and Mechanical Properties by a Liquid Pressing Infiltration Process

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Effect of varying TiB2 reinforcement and its ageing behaviour on tensile and hardness properties of in-situ Al-4.5%Cu-xTiB2 composite

Cited by 81 publications

References 31 publications

Microstructural characterization and experimental investigations into two body abrasive wear behavior of Al-7079/TiC in-situ metal matrix composites

Microstructural characterization and experimental investigations into two body abrasive wear behavior of Al-7079/TiC in-situ metal matrix composites

Multi-response optimization of electrochemical machining parameters in the micro-drilling of AA6061-TiB2in situ composites using the Entropy–VIKOR method

Fabrication of TiB2–Al1050 Composites with Improved Microstructural and Mechanical Properties by a Liquid Pressing Infiltration Process

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Multi-response optimization of electrochemical machining parameters in the micro-drilling of AA6061-TiB₂in situ composites using the Entropy–VIKOR method