熱循環(huán)溫度對(duì)Ti-6Al-4V合金組織和力學(xué)性能的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-01-07
采用500~1 000 ℃熱循環(huán)20次，研究Ti-6Al-4V(TC4)合金性能及微觀組織的變化。
熱循環(huán)溫度對(duì)Ti-6Al-4V合金組織和力學(xué)性能的影響Effect of thermal cycling temperature on microstructures?and mechanical properties of Ti-6Al-4V alloy采用500~1 000 ℃熱循環(huán)20次，研究Ti-6Al-4V(TC4)合金性能及微觀組織的變化。結(jié)果表明：隨熱循環(huán)溫度的升高，TC4合金強(qiáng)度先降低后升高；低于800 ℃時(shí)，TC4合金塑性隨熱循環(huán)溫度升高變化不大，高于800 ℃，隨熱循環(huán)溫度升高，TC4合金塑性快速降低；隨溫度升高，TC4合金的晶粒明顯長(zhǎng)大，溫度高于800 ℃時(shí)，TC4合金中開始形成片層狀組織，至1 000 ℃時(shí)，合金組織幾乎呈全片層狀。
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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