Ti-5553合金的高溫變形行為
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-01-26
在Gleeble?1500熱模擬試驗機上，當應變速率為0.1~10 s?1，變形溫度為800~860 ℃時，采用高溫壓縮試驗對Ti-5553鈦合金熱壓縮變形中流變應力行為進行研究。
Ti-5553合金的高溫變形行為Hot deformation behavior of Ti-5553 alloy在Gleeble?1500熱模擬試驗機上，當應變速率為0.1~10 s?1，變形溫度為800~860 ℃時，采用高溫壓縮試驗對Ti-5553鈦合金熱壓縮變形中流變應力行為進行研究。研究結果表明：應變速率和變形溫度的變化顯著地影響合金流變應力的大小，流變應力隨著變形溫度的升高而降低，隨應變速率的提高而增大，當流變應力達到峰值后趨于平穩(wěn)。熱變形過程的流變應力可采用雙曲正弦本構關系來描述，平均激活能為611 kJ/mol。
The flow stress behavior of Ti-5553 Titanium alloy during hot compression deformation was studied by thermal simulation test at the deformation temperature of 800?860 ℃ and the strain rate of 0.1?10 s?1?on the Gleeble?1500 thermal and mechanical simulator. The results show that the flow stress is controlled by both strain rate and deforming temperature. The flow stress decreases with the increase of deforming temperature, and increases with the increase of strain rate until the flow stress reaches the peak value, then the flow stress remains constant. The flow behaviors are described by the hyperbolic sine constitutive equation, and the average activation energy calculated is?? ?611 kJ/mol.
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