不同Al含量对ZrTiAlV合金热轧力学性能和结构的影响

Effects of Al Content on Mechanical Properties and Structure of Hot-rolled ZrTiAlV Alloys

以ZrTiAlV合金为研究对象,对热轧工艺过程中不同Al含量对ZrTiAlV合金力学性能和结构的影响进行研究。结果表明:在Al含量较低时,合金中的微观组织主要为既粗大又长的β相和极少量细小的α相,随Al含量增加,合金中细小的α相不断增加,而粗大β相逐渐减少;当铝含量增加到5.6%时,其显微组织主要为针状α相和少量的粗大初始的β相;当铝含量增加到6.9%时,其显微组织为β相、等轴的α相及(ZrTi)3Al化合物。随Al含量增加,合金屈服强度和极限抗拉强度也逐渐增加,但伸长率却逐渐减小,当Al含量为3.3%时,合金屈服强度为560 MPa;当Al含量增加到6.9%时,合金屈服强度高达1190 MPa,但其伸长率仅为3%;当Al含量为3.3%到5.6%时,该合金具有良好的力学性能。

The effects of Al content on the mechanical properties and structure of ZrTiAlV alloys for hot-rolled were investigated. The results show that at low Al content, the main microstructure of the alloy is both coarse and long β phase and a very small amount of fine α phase, with the increase in Al content, the fine α phase increases, and the coarse β phase gradually reduces; when the Al content increases to 5.6%, the microstructure of the alloy is acicular primary α phase and a small amount of the initial coarse β phase; when Al content increases to 6.9%, the microstructure is β phase, equiaxed α phase and（ZrTi）3Al compounds; with the increase in Al content, the yield strength and ultimate tensile strength gradually increase,but the elongation decreases; when the Al content is 3.3%, the yield strength of the alloy is 560 MPa, when the Al content increases to 6.9%, the yield strength of the alloy is up to 1190 MPa, but the extend rate is only 3%; when the Al content is in 3.3% to 5.6%, the alloy has good mechanical properties.