Cu-Cr-Zr-Ag合金高溫熱變形行為與變形機制
發(fā)布時間:2018-10-22 16:10
【摘要】:在Gleeble-1500D熱模擬試驗機上對Cu-Cr-Zr-Ag合金進行高溫等溫壓縮試驗,當熱壓縮應變速率為0.001~10 s-1、熱變形溫度為650~950℃時,同時對合金高溫熱壓縮的熱加工圖以及變形機制進行研究。結果表明:流變應力隨變形溫度的升高而減小,隨應變速率的提高而增大;熱變形過程中的穩(wěn)態(tài)流變應力可用雙曲正弦本構關系式來描述,其激活能為Q=343.23 k J/mol,同時利用逐步回歸的方法建立了該合金的流變應力方程。根據(jù)動態(tài)材料模型計算并分析了合金的熱加工圖,并且獲得了試驗參數(shù)范圍內(nèi)熱變形過程的最佳工藝參數(shù):溫度為750~800℃、應變速率范圍為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: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:2287647
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