416
J. Sundaram et al.
Zhao et al. also reveal elongated grain of TiB 2 improved flexural strength and fracture toughness which is essential for higher temperature structural application such
as wear parts, cutting tools and armor due to toughening and strengthening mechanisms of TiB 2 which includes grain refinement (grain fracture and grain pullout)
and crack branching, crack bridging and crack deflection. They also concluded that
fracture toughness enhanced due to mixed mode of transgranular and intergranular
fracture [32].
Mechanical properties of HMMC are influenced by reinforcement of titanium
diboride and alumina in sample-3. Hardness of sample-2 and 3 was increased by
31.94 and 41.6% than the base alloy.
4 Conclusion
• Microstructure reveals randomly distribution aluminum in aluminum AA2014
alloy of the sample-1, which as coarse particles. Addition of TiB 2 particles
in ductile matrix, which enhances the diffusivity and subsequently, reduces
agglomeration in the composite.
• Samples were undergone hot press in vacuum condition; then densities of the
billets were measured for sample-1, 2, and 3; they were 98.1%, 95.7%, and 95.1%,
respectively, which shows marginal enhancement in densities.
• Yield strength of sample-2 and sample-3 was increased by 15.7 and 33.3% than
aluminum alloy. Tensile strength of sample-2 and 3 was increased by 21.38 and
30.6% than alloy.
References
1. Mahamani A, Jayasree A, Mounika K, Reddi Prasad K, Sakthivelan N (2015) Evaluation of
mechanical properties of AA6061-TiB 2 /ZrB 2 in-situ metal matrix composites fabricated by
K2TiF6-KBF4-K2ZrF6 reaction system. Int J Microstruct Mater Prop 10:185–200
2. Rajmohan T, Palanikumar K, Arumugam S (2014) Synthesis and characterization of sintered
hybrid aluminium matrix composites reinforced with nano copper oxide particles and
microsilicon carbide particles. Compos B Eng 59:43–49
3. Khan MM, Dixit G (2017) Erosive wear response of SiCp reinforced aluminium based metal
matrix composite: effects of test environments. J Mech Eng Sci 14:2401–2414
4. MariappanR, Kishore Kumar P, Jayavelu S, Dharmalingam G, Arun Prasad M, Stalin A (2015)
Wear properties of P/M duplex stainless steels developed from 316L and 430L powders. Int J
ChemTech Res 8(10):109–115
5. Rahimian M, Parvin N, Ehsani N (2011) The effect of production parameters on microstructure
and wear resistance of powder metallurgy Al–Al 2 O 3 composite. Mater Des 32:1031–1038
6. Partheeban CMA, Rajendran M, Vettivel SC, Suresh S, Moorthi NSV (2015) Mechanical
behavior and failure analysis using online acoustic emission on nano-graphite reinforced
Al6061–10TiB 2 hybrid composite using powder metallurgy. Mater Sci Eng: A 632:1–13
J. Sundaram et al.
Zhao et al. also reveal elongated grain of TiB 2 improved flexural strength and fracture toughness which is essential for higher temperature structural application such
as wear parts, cutting tools and armor due to toughening and strengthening mechanisms of TiB 2 which includes grain refinement (grain fracture and grain pullout)
and crack branching, crack bridging and crack deflection. They also concluded that
fracture toughness enhanced due to mixed mode of transgranular and intergranular
fracture [32].
Mechanical properties of HMMC are influenced by reinforcement of titanium
diboride and alumina in sample-3. Hardness of sample-2 and 3 was increased by
31.94 and 41.6% than the base alloy.
4 Conclusion
• Microstructure reveals randomly distribution aluminum in aluminum AA2014
alloy of the sample-1, which as coarse particles. Addition of TiB 2 particles
in ductile matrix, which enhances the diffusivity and subsequently, reduces
agglomeration in the composite.
• Samples were undergone hot press in vacuum condition; then densities of the
billets were measured for sample-1, 2, and 3; they were 98.1%, 95.7%, and 95.1%,
respectively, which shows marginal enhancement in densities.
• Yield strength of sample-2 and sample-3 was increased by 15.7 and 33.3% than
aluminum alloy. Tensile strength of sample-2 and 3 was increased by 21.38 and
30.6% than alloy.
References
1. Mahamani A, Jayasree A, Mounika K, Reddi Prasad K, Sakthivelan N (2015) Evaluation of
mechanical properties of AA6061-TiB 2 /ZrB 2 in-situ metal matrix composites fabricated by
K2TiF6-KBF4-K2ZrF6 reaction system. Int J Microstruct Mater Prop 10:185–200
2. Rajmohan T, Palanikumar K, Arumugam S (2014) Synthesis and characterization of sintered
hybrid aluminium matrix composites reinforced with nano copper oxide particles and
microsilicon carbide particles. Compos B Eng 59:43–49
3. Khan MM, Dixit G (2017) Erosive wear response of SiCp reinforced aluminium based metal
matrix composite: effects of test environments. J Mech Eng Sci 14:2401–2414
4. MariappanR, Kishore Kumar P, Jayavelu S, Dharmalingam G, Arun Prasad M, Stalin A (2015)
Wear properties of P/M duplex stainless steels developed from 316L and 430L powders. Int J
ChemTech Res 8(10):109–115
5. Rahimian M, Parvin N, Ehsani N (2011) The effect of production parameters on microstructure
and wear resistance of powder metallurgy Al–Al 2 O 3 composite. Mater Des 32:1031–1038
6. Partheeban CMA, Rajendran M, Vettivel SC, Suresh S, Moorthi NSV (2015) Mechanical
behavior and failure analysis using online acoustic emission on nano-graphite reinforced
Al6061–10TiB 2 hybrid composite using powder metallurgy. Mater Sci Eng: A 632:1–13