Abstract
In the present work, the strengthen mechanism of Ti-Si-N ternary alloys prepared by Spark Plasma Sintering (SPS) is investigated. Ti, Si and TiN substrate powders were prepared in order to obtain nominal composition of Ti-0.35Si and Ti-0.35Si-1TiN (wt %). Homogenization was performed before extrusion. Microstructure was analyzed by Optical Microscope (OM) and X-ray diffraction (XRD). In order to evaluate the mechanical properties of extruded specimens, micro hardness test and tensile test were carried out. It is found that the abnormal phase with high Ncontent was observed in matrix phase of Ti-0.35Si-1TiN alloy. It is also obvious that addition of 1TiN into Ti-0.35Si (wt %) can increase yield stress and ultimate tensile stress from 859 to 1006 MPa and 914 to 1089 MPa, respectively. Hence, the strengthening mechanism of this alloy is not a solid solution mechanism, but it is due to the abnormal phase with high N content.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
