摘要
通过2个电子参数(结合次数Bot和d轨道能级Mdt)提出了新设计的α型钛(α-Ti)合金.新设计合金Ti-5Al-4Zr-3.6Sn、改性合金Ti-5Al-3Sn-1.9Zr和参考合金Ti-5Al-2.5Sn具有相同的Bot值(3.847)以及不同的Md,值(2.430,2.426,2.422).测试了3种α-Ti合金的极限抗拉伸强度(σUTS)、断裂应变(εf)和热盐腐蚀性能.3种α-Ti合金均采用冷坩埚悬浮熔炼技术进行制备.结果表明,3种合金样品均具有均匀的微观结构.在3种α-Ti合金中测量到的α单相晶粒尺寸约为600 μm.Ti-5Al-4Zr-3.6Sn合金的σUTS和εf值为801 MPa和16％,Ti-5Al-3Sn-1.9Zr合金的σUTS和εf值为708 MPa和 15％,Ti-5Al-2.5Sn合金的σUTS和εf值为603 MPa和 15％.热盐腐蚀测试进行28.8 ks后显示Ti-5Al-4Zr-3.6Sn、Ti-5Al-3Sn-1.9Zr和Ti-5Al-2.5Sn合金的失重率为2.61％、2.83％和3.10％.σUTS、εf和耐热盐腐蚀结果表明,新设计合金Ti-5Al-4Zr-3.6Sn是一种有实际应用潜力的钛合金材料.
Abstract
Newly designed α-type titanium(α-Ti)alloys were proposed based on both electron parameters(bonding time Bo,and d-orbital energy level Mdt).The newly designed α-Ti alloy Ti-5Al-4Zr-3.6Sn,modified alloy Ti-5Al-3Sn-1.9Zr,and reference alloy Ti-5Al-2.5Sn have the same Bo,value of 3.847 and different Md,values of 2.430,2.426,and 2.422,respectively.The ultimate tensile strength(σUTS),fracture strain(εf),and hot salt corrosion resistance of the three α-Ti alloys were measured.The three α-Ti alloys were produced by the cold crucible levitation melting(CCLM)technique.Results show that homogeneous microstructures can be observed in three α-Ti alloys.The α mono-phase in three α-Ti alloys has the grain size of approximately 600 pm.σUTs and εf of Ti-5Al-4Zr-3.6Sn alloy are 801 MPa and 16％,respectively;σUTS and εf of Ti-5Al-3Sn-1.9Zr alloy are 708 MPa and 15％,respectively;σUTS and εf of Ti-5Al-2.5Sn alloy are 603 MPa and 15％,respectively.After hot salt corrosion tests were conducted for 28.8 ks,the mass loss ratio of Ti-5Al-4Zr-3.6Sn,Ti-5Al-3Sn-1.9Zr,and Ti-5Al-2.5Sn alloys is 2.61％,2.83％,and 3.10％,respectively.The results of σUTS,εp and hot salt corrosion resistance indicate that the newly designed alloy Ti-5Al-4Zr-3.6Sn has great potential for practical applications.
基金项目
河北省自然科学基金(E2021210114)
Project of Hebei Province Department of Human Resources and Social Security of China(C20220325)
NETL
NSTL
万方数据