摘要:
采用不同工艺参数进行了建筑用Ti-6Al-4V-0.5Cr新型钛合金的电磁脉冲成形试验,同时进行了试验合金显微组织和力学性能的测试与分析。结果表明,采用电磁脉冲成形可获得性能较佳的试验合金,合金抗拉强度可达962 MPa、屈服强度可达891 MPa、断后伸长率可达14.5%。随放电电压从10 kV变大到20 kV或线圈间距从4 mm增至10 mm,试验合金的组织先细化后粗化,力学性能先提高后下降。与10 kV偏低的放电电压相比,当采用15 kV放电电压时试验合金的抗拉强度增大14 MPa、屈服强度增大11 MPa,断后伸长率减小1.2%。与线圈间距4 mm相比,采用7 mm线圈间距时试验合金的抗拉强度增大11 MPa、屈服强度增大9 MPa,断后伸长率减小0.8%。
Abstract:
The electromagnetic pulse forming test of Ti-6Al-4V-0.5Cr,a new titanium alloy for building,was carried out at different processing parameters,and the microstructure and mechanical properties of the alloy were tested and analyzed.The results show that the experimental alloys with better properties can be obtained by electromagnetic pulse forming.The tensile strength,yield strength and elongation after fracture can reach 962 MPa,891 MPa and 14.5% respectively.With the discharge voltage increasing from 10 kV to 20 kV or coil spacing increasing from 4 mm to 10 mm,the structure of the tested alloy is refined first and then coarsened,and the mechanical properties are improved first and then decreased.Compared with the low discharge voltage of 10 kV,the tensile strength and yield strength of the tested alloy respectively increase by 14 MPa,11 MPa and the elongation after breaking decreases by 1.2% when the discharge voltage of 15 kV is used.Compared with the coil spacing of 4 mm,the tensile strength and yield strength of the tested alloy respectively increase by 11 MPa,9 MPa and the elongation after breaking decreases by 0.8% when the coil spacing is 7 mm.
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