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热循环温度对Ti-6Al-4V合金组织和力学性能的影响
发布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新时间：2016-01-07
采用500~1 000 ℃热循环20次，研究Ti-6Al-4V(TC4)合金性能及微观组织的变化。
热循环温度对Ti-6Al-4V合金组织和力学性能的影响Effect of thermal cycling temperature on microstructures and mechanical properties of Ti-6Al-4V alloy
采用500~1 000 ℃热循环20次，研究Ti-6Al-4V(TC4)合金性能及微观组织的变化。结果表明：随热循环温度的升高，TC4合金强度先降低后升高；低于800 ℃时，TC4合金塑性随热循环温度升高变化不大，高于800 ℃，随热循环温度升高，TC4合金塑性快速降低；随温度升高，TC4合金的晶粒明显长大，温度高于800 ℃时，TC4合金中开始形成片层状组织，至1 000 ℃时，合金组织几乎呈全片层状。
The changes of microstructures and mechanical properties of Ti-6Al-4V alloy after thermal cycling 20 times from 500 ℃ to 1 000 ℃ were researched. The results show that the strength of Ti-6Al-4V alloy firstly reduces and then increases with the increase of cycling temperature. If the cycling temperature is lower than 800 ℃, its plasticity changes less with the temperature. While the temperature is higher than 800 ℃, its plasticity decreases fast. The grain size grows fast with increasing temperature. While the temperature is over 800 ℃, the lamellar microstructure forms, when the temperature reaches 1 000 ℃, the microstructure is almost lamellar one.
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