Influence of chemical composition and pre-heating temperature on the structure and martensitic transformation in porous TiNi-based shape memory alloys, produced by self-propagating high-temperature synthesis

► An increase in the Ni leads to a rise in TiNi phase fraction in porous TiNi alloy. ► Rise in the Ni decreases in TiNi phase fraction undergoing martensitic transition. ► In porous TiNi alloy the phase transitions are found in two temperature intervals. ► Pre-heating temperature influences slightly the parameters of phase transitions.