Effect of Ta addition on mechanical properties of 7715D titanium alloy

Ta元素的添加对7715D钛合金力学性能的影响(英文)

The 7715D titanium alloy added with 2.1% Ta element,nominated as 2Ta,was successfully synthesized using common casting and hot-forging technology.Two kinds of heat treatments were adopted.The phase analysis was identified by XRD.The microstructures were observed by optical microscopy（OM） and scanning electron microscopy（SEM）.Both room-temperature and high-temperature tensile properties were tested.The results show that the addition of Ta element plays an important role in the mechanical properties of 7715D titanium alloy,which strengths the alloy seriously.

采取普通的熔炼和锻造技术制备含有2.1%Ta元素的7715D钛合金(2Ta)。分别采用2种不同的热处理方式对材料进行热处理。利用XRD对试样进行物相分析,通过金相显微镜、扫描电镜分析材料的微观组织,并测试材料的室温、高温力学性能。结果表明:Ta元素的添加对材料的力学性能有很大影响,能显著强化7715D钛合金。