最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
工藝參數(shù)對(duì)粗晶Ti2AlNb合金超塑性行為的影響
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國(guó)家自然科學(xué)基金 (51175431)


Effects of Process Parameters on the Superplastic Behavior
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    研究了粗晶狀態(tài)(200~800 μm)的Ti-22Al-25Nb合金在1213~1263 K溫度范圍內(nèi)和3.3×10-4~3.3×10-2s-1初始應(yīng)變速率范圍內(nèi)的超塑性性能與變形工藝參數(shù)之間的關(guān)系，探討了溫度和應(yīng)變速率變化對(duì)合金延伸率的影響規(guī)律，并根據(jù)合金在變形過程中的流變應(yīng)力變化對(duì)合金的本構(gòu)方程進(jìn)行了求解。結(jié)果表明，在上述條件下粗晶狀態(tài)的合金也表現(xiàn)出一定的超塑性，較佳變形溫度為T=1238 K，較佳初始應(yīng)變速率為3.3×10-4s-1，延伸率達(dá)到370%，合金的延伸率隨應(yīng)變速率的降低而增大。通過對(duì)合金變形過程相關(guān)數(shù)據(jù)進(jìn)行計(jì)算，合金的熱變形激活能為759.918 kJ/mol，合金的變形機(jī)制主要表現(xiàn)為動(dòng)態(tài)再結(jié)晶和新相長(zhǎng)大

    Abstract:

    Superplastic behaviors of coarse-grained Ti-22Al-25Nb alloy were investigated at temperatures ranging of 1213~1263 K and initial strain rate raging of 3.3×10-4~3.3×10-2s-1. The constitutive equation has been established according to the flow stress of the alloy during the deformation process. The results show that the alloy exhibits a certain degree of superplasticity under above conditions. The maximum elongation exceeds 370% at 1238 K and 3.3×10-4s-1. The elongation of the alloy increases with decreasing of strain rate. The average apparent activation energy of the alloy was calculated to be 759.918 kJ/mol. The deformation mechanism of the alloy mainly is dynamic recrystallization and the new phase growth up

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

周 偉,姚澤坤,秦 春.工藝參數(shù)對(duì)粗晶Ti2AlNb合金超塑性行為的影響[J].稀有金屬材料與工程,2014,43(1):209~213.[Zhou Wei, Yao Zekun, Qin Chun. Effects of Process Parameters on the Superplastic Behavior[J]. Rare Metal Materials and Engineering,2014,43(1):209~213.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2013-01-18
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2014-04-16
  • 出版日期: