Effect Sedimentation of TiB2 Particles on the Microstructure of 7075 Al Alloy

Gui Sheng Gan; Qian Gao; Bin Yang; Shu De Gan

doi:10.4028/www.scientific.net/AMR.904.50

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 904Effect Sedimentation of TiB2 Particles on the...

Effect Sedimentation of TiB₂ Particles on the Microstructure of 7075 Al Alloy

Abstract:

Novel reactive technique has been employed in synthesis of 7075 Al matrix composites and sedimentation of TiB2 particles were studied by viscosity test. Researches have shown that most TiB2 particles reached about 900~1400nm in 3%TiB2/7075 composites, and about 600~800nm when the content is up to 6% TiB2 particles. The grain size of the 3%TiB2/7075 composites became the rosette from dendrites in 7075 Al alloy, but α-Al became the dendrite after added 6%TiB2 in 7075 Al alloy. After viscosity test, nearly spherical grains and gross dendrites can be found above and below the boundary layer respectively. Grain size in 6% TiB2/7075 composites was relatively smaller than 3% TiB2/7075 composites at the same position.

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Periodical:

Advanced Materials Research (Volume 904)

Pages:

50-53

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.904.50

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Online since:

March 2014

Authors:

Gui Sheng Gan, Qian Gao, Bin Yang*, Shu De Gan

Keywords:

7075 Al Alloy, In Situ Reactive, Particles, Sedimentation

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