Microstructure of Ti-13Nb-13Zr alloy prepared by powder metallurgy method using TiH2 as raw material

Abstract:

The sintering process is formulated by dehydrogenation properties of titanium hydride and zirconium hydride,combined with powder metallurgy method,Ti-13Nb-13Zr alloy is prepared by die pressing and vacuum sintering titanium hydride powde,niobium and zirconium hydride powder.The sample is investigated by metallographic microscope,SEM,XRD.The result shows that through this process, the relative density of sintered body is 92.2%.SEM result shows that platelet α and platelet β exists in the alloy.During the formation of the alloy,as beta stable element niobium makes the β-phase is still in the alloy after cooling.Analysis based on XRD data reveals the presence of the α-Ti andα-Zr are hcp and the β-Ti、Nb and β-Zr are bcc.