High-cycle fatigue properties of Al-based composites reinforced with in situ TiB2 and Al2O3 particulates

S. C. Tjong; G. S. Wang

doi:10.1016/j.msea.2004.07.021

High-cycle fatigue properties of Al-based composites reinforced with in situ TiB₂ and Al₂O₃ particulates

S. C. Tjong^*
, G. S. Wang

^*Corresponding author for this work

City University of Hong Kong
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

Aluminum-based composites reinforced with in situ TiB₂ and Al₂O₃ particles were synthesized through reactive hot pressing of TiO₂, Al and B powders in Al-TiO₂-B system, and TiO₂, Al and B₂O₃ powders in Al-TiO₂- B₂O₃ system. Brittle intermetallic Al₃ Ti phase was also formed in situ and distributed non-uniformly in Al matrices of the composites. The high-cycle fatigue (HCF) resistance of such in situ composites at room temperature was evaluated under fully reversed tension-compression loading. The composites reinforced with large volume content of fined TiB₂ and Al₂ O₃ particles exhibited excellent fatigue endurance limit and life under stress-controlled condition. However, intermetallic Al₃Ti blocks with a size of several micrometers were detrimental to the HCF resistance of in situ composites reinforced with TiB₂ and Al₂O₃ particles. This is due to the fracture of Al₃ Ti blocks during cycling, thereby, acting as crack initiation sites.

Original language	English
Pages (from-to)	48-53
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	386
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2004.07.021
State	Published - 25 Nov 2004
Externally published	Yes

Keywords

Composite
High-cycle fatigue
In situ particle
Intermetallic phase
Reactive hot pressing

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10.1016/j.msea.2004.07.021

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title = "High-cycle fatigue properties of Al-based composites reinforced with in situ TiB2 and Al2O3 particulates",

abstract = "Aluminum-based composites reinforced with in situ TiB2 and Al2O3 particles were synthesized through reactive hot pressing of TiO2, Al and B powders in Al-TiO2-B system, and TiO2, Al and B2O3 powders in Al-TiO2- B2O3 system. Brittle intermetallic Al3 Ti phase was also formed in situ and distributed non-uniformly in Al matrices of the composites. The high-cycle fatigue (HCF) resistance of such in situ composites at room temperature was evaluated under fully reversed tension-compression loading. The composites reinforced with large volume content of fined TiB2 and Al2 O3 particles exhibited excellent fatigue endurance limit and life under stress-controlled condition. However, intermetallic Al3Ti blocks with a size of several micrometers were detrimental to the HCF resistance of in situ composites reinforced with TiB2 and Al2O3 particles. This is due to the fracture of Al3 Ti blocks during cycling, thereby, acting as crack initiation sites.",

keywords = "Composite, High-cycle fatigue, In situ particle, Intermetallic phase, Reactive hot pressing",

author = "Tjong, \{S. C.\} and Wang, \{G. S.\}",

year = "2004",

month = nov,

day = "25",

doi = "10.1016/j.msea.2004.07.021",

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T1 - High-cycle fatigue properties of Al-based composites reinforced with in situ TiB2 and Al2O3 particulates

AU - Tjong, S. C.

AU - Wang, G. S.

PY - 2004/11/25

Y1 - 2004/11/25

N2 - Aluminum-based composites reinforced with in situ TiB2 and Al2O3 particles were synthesized through reactive hot pressing of TiO2, Al and B powders in Al-TiO2-B system, and TiO2, Al and B2O3 powders in Al-TiO2- B2O3 system. Brittle intermetallic Al3 Ti phase was also formed in situ and distributed non-uniformly in Al matrices of the composites. The high-cycle fatigue (HCF) resistance of such in situ composites at room temperature was evaluated under fully reversed tension-compression loading. The composites reinforced with large volume content of fined TiB2 and Al2 O3 particles exhibited excellent fatigue endurance limit and life under stress-controlled condition. However, intermetallic Al3Ti blocks with a size of several micrometers were detrimental to the HCF resistance of in situ composites reinforced with TiB2 and Al2O3 particles. This is due to the fracture of Al3 Ti blocks during cycling, thereby, acting as crack initiation sites.

AB - Aluminum-based composites reinforced with in situ TiB2 and Al2O3 particles were synthesized through reactive hot pressing of TiO2, Al and B powders in Al-TiO2-B system, and TiO2, Al and B2O3 powders in Al-TiO2- B2O3 system. Brittle intermetallic Al3 Ti phase was also formed in situ and distributed non-uniformly in Al matrices of the composites. The high-cycle fatigue (HCF) resistance of such in situ composites at room temperature was evaluated under fully reversed tension-compression loading. The composites reinforced with large volume content of fined TiB2 and Al2 O3 particles exhibited excellent fatigue endurance limit and life under stress-controlled condition. However, intermetallic Al3Ti blocks with a size of several micrometers were detrimental to the HCF resistance of in situ composites reinforced with TiB2 and Al2O3 particles. This is due to the fracture of Al3 Ti blocks during cycling, thereby, acting as crack initiation sites.

KW - Composite

KW - High-cycle fatigue

KW - In situ particle

KW - Intermetallic phase

KW - Reactive hot pressing

UR - https://www.scopus.com/pages/publications/5744243942

U2 - 10.1016/j.msea.2004.07.021

DO - 10.1016/j.msea.2004.07.021

M3 - 文章

AN - SCOPUS:5744243942

SN - 0921-5093

VL - 386

SP - 48

EP - 53

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

High-cycle fatigue properties of Al-based composites reinforced with in situ TiB₂ and Al₂O₃ particulates

Abstract

Keywords

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