高溫變形參量對TC21鈦合金組織與性能的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-01-07
在880~950 ℃和不同應(yīng)變速率0.01~10 s?1條件下，將TC21鈦合金高溫壓縮變形至50%。研究高溫變形參量對流動應(yīng)力及微觀組織的影響規(guī)律，建立了TC21合金的本構(gòu)方程。
高溫變形參量對TC21鈦合金組織與性能的影響Influence of high temperature deformation parameters on?microstructure and properties of TC21 titanium alloy在880~950 ℃和不同應(yīng)變速率0.01~10 s?1條件下，將TC21鈦合金高溫壓縮變形至50%。研究高溫變形參量對流動應(yīng)力及微觀組織的影響規(guī)律，建立了TC21合金的本構(gòu)方程。結(jié)果表明：流變應(yīng)力隨變形溫度的降低及應(yīng)變速率的增大而升高，變形溫度與應(yīng)變速率對TC21鈦合金顯微組織的影響顯著，應(yīng)變速率越低，組織球化現(xiàn)象越明顯。高溫變形過程中，TC21鈦合金的流變應(yīng)力與Zener-Hollomon參數(shù)的指數(shù)形式呈線性關(guān)系。
The hot deformation behavior of TC21 titanium alloy was investigated at 880?950 ℃, in a strain rate range of 0.01?10 s?1?and with the total deformation of 50%. The influence of hot deformation parameters on the flow stress and microstructure was investigated, and the constitutive equation was presented. The results indicate that the flow stress rises with increasing strain rate and decreasing temperature. The microstructure evolvement is largely affected by deformation temperature and strain rate. The globalizing process is more obvious with decreasing strain rate. The flow stress of TC21 titanium alloy at high temperature can be represented by a Zener-Hollomon parameter with the exponent-type equation.
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