氧含量对ZTA15钛合金显微组织和力学性能的影响  

Effect of oxygen content on microstructure and mechanical properties of ZTA15 titanium alloy

作　　者：刘天翼 李重阳 于仓瑞 刘时兵 史昆 曲赫威 LIU Tianyi;LI Chongyang;YU Cangrui;LIU Shibing;SHI Kun;QU Hewei(National Key Laboratory of Advanced Casting Technologies,China Academy of Machinery Shenyang Research Institute of Foundry Co.,Ltd.,Shenyang 110022,China;Beijing Xinghang Electro-mechanical Equipment Co.,Ltd.,Beijing 100074,China)

机构地区：[1]中国机械总院集团沈阳铸造研究所有限公司高端装备铸造技术全国重点实验室,沈阳110022 [2]北京星航机电装备有限公司,北京100074

出　　处：《航空材料学报》2025年第2期66-72,共7页Journal of Aeronautical Materials

摘　　要：通过悬浮熔炼工艺制备氧含量为0.08%(质量分数,下同)、0.12%、0.16%和0.2%的ZTA15钛合金铸锭,利用OM、SEM和XRD等设备研究氧含量对ZTA15钛合金显微组织及力学性能的影响。研究结果表明:4种不同氧含量的ZTA15组织均为典型的魏氏组织。随着氧含量的增加,α集束的长度变短,方向变得混乱,4种合金α板条片层宽度逐渐减小,分别为3.92、3.06、2.49μm和2.77μm。随着氧含量的增加对合金的固溶强化效果增强,合金抗拉强度和屈服强度整体呈现出先升高后降低的趋势,塑性降低。氧含量为0.16%时合金屈服强度和抗拉强度最高分别为1037 MPa和909 MPa,当氧含量为0.2%时合金强度明显降低主要是因为形成了粗大的α相组织,此时合金塑性最低。ZTA15 titanium alloy ingots,containing oxygen levels of 0.08%,0.12%,0.16%,and 0.2%(mass fraction),are produced through the levitation melting technique.The effect of oxygen content on the microstructure and mechanical properties of the alloy is examined using optical microscopy(OM),scanning electron microscopy(SEM),and X-ray diffraction(XRD).The results show that all four ZTA15 structures,varying in oxygen content,are typical Weisberg morphologies.As oxygen content increase,theα-phase bunches shorten and their orientation become more disordered.Furthermore,the widths of theα-slats in the four alloys decrease progressively,measuring 3.92,3.06,2.49μm,and 2.77μm,respectively.Initially,as oxygen content rose,both tensile and yield strengths of the alloy increase,followed by a decrease,with a concurrent decline in plasticity.Notably,the alloy with 0.16%oxygen demonstrate peak yield and tensile strengths of 1037 MPa and 909 MPa,respectively.However,when oxygen content reach 0.2%,a significant strength reduction is observed,primarily due to the formation of a coarseα-phase structure,resulting in the lowest elongation among the alloys.

关 键 词：钛合金 ZTA15 氧含量 显微组织 力学性能 

分 类 号：V252.2[一般工业技术—材料科学与工程]