Phase transformation behavior of Ti49Ni49.5Fe1V0.5 and Ti48Ni48.5Fe1V2.5 alloys after different heat treatments

作者：Liu Yang Yang; Liu Fu Shun^*

来源：Rare Metals, 2014, 33(1): 16-20.

DOI：10.1007/s12598-013-0075-4

• Heat treatments
• Phase transformation behavior
• Ti-Ni-Fe-V alloy
• Second-phase particles

The effects of heat treatments on the phase transformation behavior of Ti49Ni49.5Fe1V0.5 and Ti48Ni48.5Fe1V2.5 alloys were investigated. The results indicate that the alloys subjected to different heat treatments have B2 structure at room temperature. All the specimens exhibit a two-stage B2 -> R -> B19' martensitic transformation on cooling, but a B19' -> B2 one-stage reverse martensitic transformation on heating except aged A1 alloy, which undergoes an abnormal two-stage transformation upon heating. The phase transformation temperatures are affected by heat treatments and V content, which can be attributed to the variation of the second-phase particles content in the matrix.

• 出版日期2014-2
• 单位北京大学