CAJ | 학술논문

β相可以提高TiAl金属间化合物的塑性.通过显微组织分析和变形行为的评估研究β稳定性元素Fe和Mo对Ti-45Al-xFe-yMo(x,y=1,2,3,4)合金的影响.结果表明:合金中的B2(β)相随着Fe和Mo元素含量的增加而增多,Mo表现出强的β稳定性.加入3％Fe和2％Mo后,合金的晶粒得到细化,其尺寸达到12μm.由于具有一定量的β相,细化后的Ti-45Al-3Fe-2Mo合金在790℃具有良好的塑性.
β상가이제고TiAl금속간화합물적소성.통과현미조직분석화변형행위적평고연구β은정성원소Fe화Mo대Ti-45Al-xFe-yMo(x,y=1,2,3,4)합금적영향.결과표명:합금중적B2(β)상수착Fe화Mo원소함량적증가이증다,Mo표현출강적β은정성.가입3％Fe화2％Mo후,합금적정립득도세화,기척촌체도12μm.유우구유일정량적β상,세화후적Ti-45Al-3Fe-2Mo합금재790℃구유량호적소성.
The ductility of TiAl intermetallics can be improved through stabilizing the ductile β phase.New β-stabilized Ti-45Al-xFe-yMo (x,y=1,2,3,4) alloys were designed through adding theβ stabilizing elements Fe and Mo.The microstructural evolution and deformation behavior of the Ti-45Al-xFe-yMo alloys were investigated.The results show that the amount ofβ(B2)phase is increased with the increase of alloying elements,Mo shows a higher capability for stabilizing the β phase than Fe.In the optimized Ti-45Al-3Fe-2Mo alloy,the grains are significantly refined to about 12 μm,and this alloy shows a very good hot ductility at the elevated temperature.