142
R. Goswami et al.
2. A cube on cube orientation relationship has been observed with the copper matrix
and the Cu 2 O. The amount of Cu 2 O is significantly higher than Al 2 O 3 .
3. Cold work produces elongated grains with brass texture and XRD studies showed
the intensity ratio of 220 peak to 111 peak is high in the as-received condition. During service, it had undergone high strain rate shear deformation at relatively high temperatures. As a result, the intensity ratio of 220/111 peak intensity
changes significantly, suggesting lattice rotation across several grains.
4. The strength of the composite stems from these oxide particles, and the 15%
increase in modulus is mostly due to the presence of Cu 2 O nanodispersion
throughout the matrix. The increase in strength of the composite as compared to
pure Cu can be described by the Orowan strengthening mechanism.
Acknowledgements Funding for this project was provided by the Office of Naval Research (ONR)
through the Naval Research Laboratory’s 6.1 Research Program.
References
1. Nie C, Gu J, Liu J, Zhang D (2007) Production of boron carbide reinforced 2024 aluminum
matrix composites by mechanical alloying. Mater Trans 48:990–995
2. Surappa MK (2003) Aluminium matrix composites: challenges and opportunities. Sadhana
28:319–334
3. Surappa MK, Rohatgi PK (1981) Preparation and properties of aluminium alloy ceramic particle
composites. J Mater Sci 16:983–993
4. Frage N, Hayun S, Kalabukhov S, Dariel MP (2007) Powder Metall Met Ceram 46:533–538
5. Goswami R, Qadri SB, Bernstein N, Moser A (2020) Role of microstructure and interfaces in governing the mechanical properties XE “mechanical properties” of nanocomposites
manufactured in the solid state. JOM 72:2875–2881
6. Goswami R, Qadri SB, Wollmershauser J, Kolel-Veetil MK, Feygelson B (2017) Pressure
and additive mediated sintering of B 4 C at relatively low temperatures. Metall Mater Trans A
48(3):1230–1235
7. Zwilsky KM, Grant NJ (1966) Dispersion strengthening in the copper-alumina system. AIME
Trans 221:371–377
8. Goswami R, Pande CS, Bernstein N, Johannes MD, Baker C, Villalobos G (2015) A high degree
of enhancement of strength of sputter deposited Al/Al 2 O 3 multilayers upon post annealing.
Acta Mater 95:378–385
9. Hull D, Bacon DJ (2001) Introduction to dislocations. Elsevier Ltd.
10. Tang G, Shen YL, Singh DRP, Chawla N (2008) Analysis of indentation-derived effective
elastic modulus of metal-ceramic multilayers. Int J Mech Mater Des 4:391–398
R. Goswami et al.
2. A cube on cube orientation relationship has been observed with the copper matrix
and the Cu 2 O. The amount of Cu 2 O is significantly higher than Al 2 O 3 .
3. Cold work produces elongated grains with brass texture and XRD studies showed
the intensity ratio of 220 peak to 111 peak is high in the as-received condition. During service, it had undergone high strain rate shear deformation at relatively high temperatures. As a result, the intensity ratio of 220/111 peak intensity
changes significantly, suggesting lattice rotation across several grains.
4. The strength of the composite stems from these oxide particles, and the 15%
increase in modulus is mostly due to the presence of Cu 2 O nanodispersion
throughout the matrix. The increase in strength of the composite as compared to
pure Cu can be described by the Orowan strengthening mechanism.
Acknowledgements Funding for this project was provided by the Office of Naval Research (ONR)
through the Naval Research Laboratory’s 6.1 Research Program.
References
1. Nie C, Gu J, Liu J, Zhang D (2007) Production of boron carbide reinforced 2024 aluminum
matrix composites by mechanical alloying. Mater Trans 48:990–995
2. Surappa MK (2003) Aluminium matrix composites: challenges and opportunities. Sadhana
28:319–334
3. Surappa MK, Rohatgi PK (1981) Preparation and properties of aluminium alloy ceramic particle
composites. J Mater Sci 16:983–993
4. Frage N, Hayun S, Kalabukhov S, Dariel MP (2007) Powder Metall Met Ceram 46:533–538
5. Goswami R, Qadri SB, Bernstein N, Moser A (2020) Role of microstructure and interfaces in governing the mechanical properties XE “mechanical properties” of nanocomposites
manufactured in the solid state. JOM 72:2875–2881
6. Goswami R, Qadri SB, Wollmershauser J, Kolel-Veetil MK, Feygelson B (2017) Pressure
and additive mediated sintering of B 4 C at relatively low temperatures. Metall Mater Trans A
48(3):1230–1235
7. Zwilsky KM, Grant NJ (1966) Dispersion strengthening in the copper-alumina system. AIME
Trans 221:371–377
8. Goswami R, Pande CS, Bernstein N, Johannes MD, Baker C, Villalobos G (2015) A high degree
of enhancement of strength of sputter deposited Al/Al 2 O 3 multilayers upon post annealing.
Acta Mater 95:378–385
9. Hull D, Bacon DJ (2001) Introduction to dislocations. Elsevier Ltd.
10. Tang G, Shen YL, Singh DRP, Chawla N (2008) Analysis of indentation-derived effective
elastic modulus of metal-ceramic multilayers. Int J Mech Mater Des 4:391–398