The Effect of a Small Volume Liquid Phase on the Hot Deformation in the BaPbO3/2024Al Composite

Guo Hua Fan; Zhen Zhu Zheng; Jin Cheng Pang; Lin Geng

doi:10.4028/www.scientific.net/MSF.654-656.2684

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656The Effect of a Small Volume Liquid Phase on the...

The Effect of a Small Volume Liquid Phase on the Hot Deformation in the BaPbO₃/2024Al Composite

Abstract:

In this paper, BaPbO3(5Vol.%)/2024Al composite was fabricated by powder metallurgy method. Nanosized Pb particles were formed from the in-situ reaction between BaPbO3 and 2024Al, and mainly distributed homogeneously inside grains. The hot compression deformation of the composite at different temperatures was performed. The microstructure evolution of the 2024Al matrix and dynamic mechanical analysis (DMA) of the composite were made to investigate the effect of liquid Pb on the hot deformation. The results show that the presence of the liquid phase reduces deformation resistance by decreasing dislocation pileups, and simultaneous decrease in Young’s modulus of the composite.