TY - JOUR
T1 - Synthesis and characterization of TiN nanoceramic reinforced Ti–7Al–1Mo composite produced by spark plasma sintering
AU - Jeje, Samson Olaitan
AU - Shongwe, Mxolisi Brendon
AU - Maledi, Nthabiseng
AU - Rominiyi, Azeez Lawan
AU - Adesina, Olanrewaju S.
AU - Olubambi, Peter Apata
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/3/11
Y1 - 2021/3/11
N2 - Materials made from alloys of titanium are of utmost importance for various engineering applications owing to their low density and remarkable mechanical properties. Nevertheless, there is a need to enhance their mechanical properties to improve their capacity for load-bearing applications. In this work, spark plasma sintering technique was employed to fabricate TiN nanoceramic reinforced Ti–7Al–1Mo composite. The influence of nano-TiN reinforcement additions on the densification, microstructural evolution, and mechanical properties of Ti–7Al–1Mo ternary alloy was investigated. Scanning electron microscope equipped with energy dispersive x-ray spectrometer was used to investigate the microstructural evolution. The phases present in the sintered composite were investigated using X-ray diffractometer. Unreinforced Ti–7Al–1Mo alloy showed a microstructure with distinct grain boundaries made up of Widmanstatten lath-like morphology with mainly alpha (α) phase and a small percentage of beta (β) phase. Nano-TiN reinforced Ti–7Al–1Mo composites’ morphology revealed a bimodal structure. Ti–7Al–1Mo/7TiN composite was found to possess the highest hardness value of 549 ± 22 HV1.0 and the highest compressive yield strength of 1295 ± 7 MPa, which depicts an increment of 74 HV and 323 MPa respectively when compared to unreinforced Ti–7Al–1Mo ternary alloy. The developed composites showed strong potentials for load-bearing applications.
AB - Materials made from alloys of titanium are of utmost importance for various engineering applications owing to their low density and remarkable mechanical properties. Nevertheless, there is a need to enhance their mechanical properties to improve their capacity for load-bearing applications. In this work, spark plasma sintering technique was employed to fabricate TiN nanoceramic reinforced Ti–7Al–1Mo composite. The influence of nano-TiN reinforcement additions on the densification, microstructural evolution, and mechanical properties of Ti–7Al–1Mo ternary alloy was investigated. Scanning electron microscope equipped with energy dispersive x-ray spectrometer was used to investigate the microstructural evolution. The phases present in the sintered composite were investigated using X-ray diffractometer. Unreinforced Ti–7Al–1Mo alloy showed a microstructure with distinct grain boundaries made up of Widmanstatten lath-like morphology with mainly alpha (α) phase and a small percentage of beta (β) phase. Nano-TiN reinforced Ti–7Al–1Mo composites’ morphology revealed a bimodal structure. Ti–7Al–1Mo/7TiN composite was found to possess the highest hardness value of 549 ± 22 HV1.0 and the highest compressive yield strength of 1295 ± 7 MPa, which depicts an increment of 74 HV and 323 MPa respectively when compared to unreinforced Ti–7Al–1Mo ternary alloy. The developed composites showed strong potentials for load-bearing applications.
KW - Compression
KW - Densification
KW - Microhardness
KW - Spark plasma sintering
KW - Titanium matrix composite
UR - http://www.scopus.com/inward/record.url?scp=85100635513&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2021.140904
DO - 10.1016/j.msea.2021.140904
M3 - Article
AN - SCOPUS:85100635513
SN - 0921-5093
VL - 807
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
M1 - 140904
ER -