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Rare Metals

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01-11-2016

Microstructure evolution of TiB₂ particle-reinforced 7075 Al alloy slurry in semisolid state with different holding time

Authors: Gui-Sheng Gan, Bin Yang

Published in: Rare Metals | Issue 11/2016

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Abstract

TiB₂ particle-reinforced 7075 Al alloy was synthesized to investigate the effect of TiB₂ particles on microstructure of semisolid 7075 Al alloy slurry. The mean grain size and shape factor of 3 wt% TiB₂/7075 composite could reach 92 μm and 0.64 at 630 °C for 23 min, respectively, and for 6 wt% TiB₂/7075 composite, they are 100 μm and 0.64 at 630 °C for 33 min. The microstructure evolution for TiB₂/7075 composites in semisolid state includes three-stage process. α-Al begins to nucleate and grow up into rosette grains due to a low degree of supercooling at first. Then rosette grains begin to fuse or grow up at different rates. Finally, the dissolution rate and the growth rate of α-Al reach equilibrium.

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Title: Microstructure evolution of TiB2 particle-reinforced 7075 Al alloy slurry in semisolid state with different holding time
Authors: Gui-Sheng Gan
Bin Yang
Publication date: 01-11-2016
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 11/2016
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-015-0639-6

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