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Ti8LC合金熱變形及其微觀組織
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總裝備部預(yù)研項(xiàng)目（51312050107）


Hot Deformation and Microstructure of Ti8LC Alloy
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    摘要:

    采用GLEEBLE-1500熱模擬機(jī)對(duì)Ti8LC合金在溫度為850~1000 ℃、變形速率為0.001~0.1 s-1、最大變形程度為60%的條件下，進(jìn)行恒應(yīng)變速率高溫壓縮模擬試驗(yàn)研究，分析合金高溫變形時(shí)流變應(yīng)力與應(yīng)變速率及變形溫度之間的關(guān)系以及組織變化。結(jié)果表明：Ti8LC合金流變應(yīng)力隨應(yīng)變速率的增大而增大，在恒應(yīng)變速率條件下，真應(yīng)力水平隨溫度的升高而降低；在給定的變形條件下，通過(guò)回歸計(jì)算，建立了一種Ti8LC合金的本構(gòu)方程；根據(jù)試驗(yàn)分析，在850~950 ℃溫度時(shí)變形，主要發(fā)生動(dòng)態(tài)再結(jié)晶，隨著溫度的升高，軟化機(jī)制主要是動(dòng)態(tài)回復(fù)。

    Abstract:

    High temperature compression simulation tests were carried out on Ti8LC alloy at a constant strain rate by a GLEEBLE-1500 thermal simulator, under the conditions of 850-1000 oC, 0.001-0.1 s-1 and maximal deformation of 60%. The effects of the strain rate and the forming temperature on the flow stress and the microstructure transition were investigated. The results reveal that the flow stress of Ti8LC increased as the strain rate increased, and at a constant strain rate the true stress decreased as the forming temperature increased. In the situation of experiment, the constitution equation of Ti8LC alloy was established by regression calculation. According to the experimental analysis, dynamic recrystallization happened while deformed at 850-950 oC. In addition the dynamic recovery was the mainly softening mechanism at evaluated temperature.

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舒大禹,趙祖德,彭菲菲,康 鳳,胡傳凱,張 津. Ti8LC合金熱變形及其微觀組織[J].稀有金屬材料與工程,2010,39(5):804~808.[Shu Dayu, Zhao Zude, Peng Feifei, Kang Feng, Hu Chuankai, Zhang Jin. Hot Deformation and Microstructure of Ti8LC Alloy[J]. Rare Metal Materials and Engineering,2010,39(5):804~808.]
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  • 收稿日期:2009-05-20
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