Acta Metallurgica Sinica (English Letters) >
Effect of B4C on the Microstructure and Mechanical Properties of As-Cast TiB+TiC/TC4 Composites
Received date: 2013-06-04
Revised date: 2013-09-15
Online published: 2014-05-07
Different additions of B4C were introduced into TC4 to alter the microstructure and mechanical properties. The morphologies of reinforcements are related to the solidification paths. The refinement of lamellar spacing λ is based on the precipitation pattern of β-phases. Microhardness, compression elastic modulus (Ec), and elastic modulus of the matrix (Em) appear non-linear relationships with B4C additions. Due to the refinement of lamellar spacing with Hall–Petch-type relationships, and the solution strengthening of C on the α + β matrix, the effect of reinforcements on the mechanical properties will be more efficient when the additions of B4C are no more than 0.19 wt%. When the additions of B4C are more than 0.19 wt%, the efficiency will decrease.
Key words： Titanium matrix composites; Lamellar spacing λ; Microstructure; TiC; TiB; Nanoindentation
Jiheng Wang , Xianglong Guo , Lv Xiao , Liqiang Wang , Weijie Lu , Baohui Li , Zhongquan Li , Di Zhang . Effect of B4C on the Microstructure and Mechanical Properties of As-Cast TiB+TiC/TC4 Composites[J]. Acta Metallurgica Sinica (English Letters), 2014 , 27(2) : 205 -210 . DOI: 10.1007/s40195-014-0035-5
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