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TiNiCu合金的熱壓縮變形行為
發(fā)布人:上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間:2015-09-11
采用Gleeble-1500熱模擬試驗機對TiNiCu 合金進行熱壓縮變形實驗,分析該合金在變形溫度為600~850 ℃、應變速率為0.5~50條件下的變形行為。采用雙曲正弦模型確定該合金的變形激活能Q和應力指數n,建立該合金的熱變形本構關系。
TiNiCu合金的熱壓縮變形行為Hot deformation behavior of TiNiCu alloy
采用Gleeble-1500熱模擬試驗機對TiNiCu 合金進行熱壓縮變形實驗,分析該合金在變形溫度為600~850 ℃、應變速率為0.5~50條件下的變形行為。采用雙曲正弦模型確定該合金的變形激活能Q和應力指數n,建立該合金的熱變形本構關系。結果表明:TiNiCu 合金熱壓縮流變應力受變形溫度和應變速率顯著影響,流變應力隨變形溫度的升高和應變速率的下降而降低,材料在低應變速率條件下的軟化機制以動態(tài)回復為主,在較高應變速率下容易發(fā)生動態(tài)再結晶。
Hot compression deformation of TiNiCu alloy was performed on Gleeble-1500 at strains of 0.5-50.0 and deformation temperatures of 600-850 ℃. The constitutive relationship of TiNiCu alloy is obtained based on Arrhenius equations, from which the activation energy Q and stress factor n are derived. The results show that dynamic recovery is the main softening mechanism at lower strain rates, but dynamic recrystallization softening dominates at the higher strain rates. The flow stress decreases with the increase of deformation temperature and the decrease of strain.
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