东南大学学报（自然科学版）Issue(3)：478-483,6.DOI:10.3969/j.issn.1001-0505.2015.03.012
氧含量对 Ti-35Nb-3．7Zr-1．3Mo-xO 合金组织与力学性能的影响
Influence of oxygen content on microstructure and mechanical properties of Ti-35Nb-3.7Zr-1.3Mo-xO alloys
沈睿 1陈锋 2余新泉 1张友法 1李果 1张强1
作者信息
- 1. 东南大学材料科学与工程学院，南京211189
- 2. 江阴市产品质量监督检验所，江阴214434
- 折叠
摘要
Abstract
The new meta-stable βtitanium alloy Ti-35Nb-3.7Zr-1.3Mo-xO was designed according to the d-electron design theory.The influence of oxygen content on its microstructure and mechanical properties was investigated.It is indicated thatβphase is the principal phase after solution treatment, and the grains are refined gradually with the increase of oxygen content.A small amount ofα″phase is observed in the alloys with low oxygen content.Thermalα″phase transformation is suppressed by the addition of oxygen.βphase is still the principal phase after cold working while its crystallinity decreases due to the increase of defects by deformation.Needle-like α″, plate-like ω, zig-zag twin and stress induced α″martensite are observed in cold worked alloys with different oxygen contents. The ultimate tensile strength ( UTS) , elastic modulus and hardness increase and plasticity decreases with the increase of oxygen content.The addition of 0.1%O results in an increase of UTS by about 100 MPa, and the addition of 0.3%O results in an increase of Vickers-hardness by about 50.The average elastic moduli of the alloys with different oxygen contents are between 45 to 75 GPa.When the oxygen content exceeds 0.6%, the plasticity of the alloy deteriorates significantly.关键词
氧元素/β钛合金/微观组织/力学性能Key words
oxygen element/beta titanium alloy/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
沈睿,陈锋,余新泉,张友法,李果,张强..氧含量对 Ti-35Nb-3．7Zr-1．3Mo-xO 合金组织与力学性能的影响[J].东南大学学报（自然科学版）,2015,(3):478-483,6.
