Tailorable Burning Behavior of Ti14 Alloy by Controlling Semi-Solid Forging Temperature.
Tailorable Burning Behavior of Ti14 Alloy by Controlling Semi-Solid Forging Temperature.
复制标题
通过控制半固态锻造温度调节 Ti14 合金的燃烧行为
DOI：
10.3390/ma9080697
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发表时间：
2016-08-16
期刊：
影响因子：
--
通讯作者：
Gu Y
中科院分区：
文献类型：
--
作者：
Chen Y;Yang W;Zhan H;Zhang F;Huo Y;Zhao Y;Song X;Gu Y
半固态加工是一种常用的金属近净成形技术，但钛合金的成形性较差，限制了其在钛合金中的应用。近年来的研究表明，固相微处理能有效地提高钛合金的成形性能和力学性能。工艺参数如温度和锻造速率/比与微观结构直接相关，从而赋予合金不同的化学和物理性能。作为先进航空发动机的关键结构材料，阻燃性能是对阻燃钛合金的重要要求。因此，本工作的目的是评估的燃烧行为的Ti 14，一种阻燃合金，在不同的半固态锻造温度锻造。通过一系列不同燃烧时间、不同燃烧速度和不同燃烧试样显微组织的燃烧试验，分析了该合金的燃烧特性。结果表明，锻造温度对烧结过程有很大的影响，温度越高，晶粒内和沿着晶界析出的Ti 2Cu越多。这种微结构通过在燃烧产物区下方形成一种氧隔离的富铜层，阻碍了稳定燃烧阶段氧的传输。研究表明，通过控制半固态锻造温度，可以有效地调节合金的抗燃烧性能。
Semi-solid processing (SSP) is a popular near-net-shape forming technology for metals, while its application is still limited in titanium alloy mainly due to its low formability. Recent works showed that SSP could effectively enhance the formability and mechanical properties of titanium alloys. The processing parameters such as temperature and forging rate/ratio, are directly correlated with the microstructure, which endow the alloy with different chemical and physical properties. Specifically, as a key structural material for the advanced aero-engine, the burn resistant performance is a crucial requirement for the burn resistant titanium alloy. Thus, this work aims to assess the burning behavior of Ti14, a kind of burn resistant alloy, as forged at different semi-solid forging temperatures. The burning characteristics of the alloy are analyzed by a series of burning tests with different burning durations, velocities, and microstructures of burned sample. The results showed that the burning process is highly dependent on the forging temperature, due to the fact that higher temperatures would result in more Ti2Cu precipitate within grain and along grain boundaries. Such a microstructure hinders the transport of oxygen in the stable burning stage through the formation of a kind of oxygen isolation Cu-enriched layer under the burn product zone. This work suggests that the burning resistance of the alloy can be effectively tuned by controlling the temperature during the semi-solid forging process.
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发表时间：
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影响因子：
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