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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.85978597.cn
更新時(shí)間：2015-09-11
采用Gleeble-1500熱模擬試驗(yàn)機(jī)對(duì)TiNiCu 合金進(jìn)行熱壓縮變形實(shí)驗(yàn)，分析該合金在變形溫度為600~850 ℃、應(yīng)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(yīng)力指數(shù)n，建立該合金的熱變形本構(gòu)關(guān)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(yàn)機(jī)對(duì)TiNiCu 合金進(jìn)行熱壓縮變形實(shí)驗(yàn)，分析該合金在變形溫度為600~850 ℃、應(yīng)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(yīng)力指數(shù)n，建立該合金的熱變形本構(gòu)關(guān)系。結(jié)果表明：TiNiCu 合金熱壓縮流變應(yīng)力受變形溫度和應(yīng)變速率顯著影響，流變應(yīng)力隨變形溫度的升高和應(yīng)變速率的下降而降低，材料在低應(yīng)變速率條件下的軟化機(jī)制以動(dòng)態(tài)回復(fù)為主，在較高應(yīng)變速率下容易發(fā)生動(dòng)態(tài)再結(jié)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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