通过熔炼和压力加工研制了一种多元低密度NbTiAlVZr合金,合金密度为5.9 g/cm3,是目前难熔合金中密度最低的一种.采用光学显微镜,透射电镜,拉伸试验机对合金微观组织和力学性能进行表征,结果表明:该合金室温平均抗拉强度为990 MPa,延伸率为16%,1100℃抗拉强度达到80 MPa,延伸率为44%.该合金是一种综合了固溶强化和第二相TiC纳米粒子弥散强化的新型铌合金,同时也是一种塑性好,可进行压力加工成型的低密度铌合金.
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