Title of article :
Size effect of B4C powders on metallurgical reaction and resulting tensile properties of Ti matrix composites by in-situ reaction from Ti–B4C system under a relatively low temperature
Author/Authors :
Jia، نويسنده , , Lei and Li، نويسنده , , Shufeng and Imai، نويسنده , , Hisashi and Chen، نويسنده , , Biao and Kondoh، نويسنده , , Katsuyoshi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
7
From page :
129
To page :
135
Abstract :
Ti matrix composites (TMCs) were prepared by using spark plasma sintering (SPS) and hot extrusion from Ti–B4C powder system with different sizes of B4C addition. Tensile properties, O/N contents, grain sizes, microstructures, phase compositions and fractured surfaces were investigated systematically. Then, the effect of B4C particle size on the strength and ductility of TMCs were discussed based on the experimental results and strengthening theory. Results showed that coarse B4C powders led to incomplete reaction and decrease of the amount of both TiCp and TiBw in the Ti matrix, thus resulting in the significant decrease of strength but increase of elongation. The strength improvement of TMCs could be mainly attributed to the strengthening effect of in-situ formed TiCp and TiBw, especially the load-bearing transformation of TiBw. However, the limitation of the TiBw on the deformation of Ti matrix decreased the ductility of the TMCs dramatically.
Keywords :
Titanium matrix composites , spark plasma sintering , Tensile Properties , In-situ reaction , microstructure
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Serial Year :
2014
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Record number :
2176728
Link To Document :
بازگشت