Cu-Cr-Zr-Ag合金高溫?zé)嶙冃涡袨榕c變形機(jī)制
發(fā)布時(shí)間:2018-10-22 16:10
【摘要】:在Gleeble-1500D熱模擬試驗(yàn)機(jī)上對(duì)Cu-Cr-Zr-Ag合金進(jìn)行高溫等溫壓縮試驗(yàn),當(dāng)熱壓縮應(yīng)變速率為0.001~10 s-1、熱變形溫度為650~950℃時(shí),同時(shí)對(duì)合金高溫?zé)釅嚎s的熱加工圖以及變形機(jī)制進(jìn)行研究。結(jié)果表明:流變應(yīng)力隨變形溫度的升高而減小,隨應(yīng)變速率的提高而增大;熱變形過(guò)程中的穩(wěn)態(tài)流變應(yīng)力可用雙曲正弦本構(gòu)關(guān)系式來(lái)描述,其激活能為Q=343.23 k J/mol,同時(shí)利用逐步回歸的方法建立了該合金的流變應(yīng)力方程。根據(jù)動(dòng)態(tài)材料模型計(jì)算并分析了合金的熱加工圖,并且獲得了試驗(yàn)參數(shù)范圍內(nèi)熱變形過(guò)程的最佳工藝參數(shù):溫度為750~800℃、應(yīng)變速率范圍為0.01~0.1 s-1,并利用熱加工圖分析了該合金不同區(qū)域的高溫變性特征以及組織變化。
[Abstract]:The high temperature isothermal compression test of Cu-Cr-Zr-Ag alloy was carried out on the Gleeble-1500D thermal simulator. When the strain rate of hot compression was 0.001n-1 and the hot deformation temperature was 650 ~ 950 鈩,
本文編號(hào):2287647
[Abstract]:The high temperature isothermal compression test of Cu-Cr-Zr-Ag alloy was carried out on the Gleeble-1500D thermal simulator. When the strain rate of hot compression was 0.001n-1 and the hot deformation temperature was 650 ~ 950 鈩,
本文編號(hào):2287647
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