-1條件下對Cu-6 wt.% Ag合金進(jìn)行等溫?zé)釅嚎s實驗。利用實驗所得流變應(yīng)力—應(yīng)變曲線,分析了高應(yīng)變速率下Cu-6 wt.% Ag合金高溫塑性變形時微觀組織的演變行為；研究了高溫塑性變形中材料的塑性變形機制；構(gòu)建了一種簡化的本構(gòu)模型,并引入Arrhenius方程及Z參數(shù)對模型進(jìn)行改進(jìn)。研究結(jié)果表明：Cu-6 wt.% Ag合金在熱塑性變形過程中發(fā)生了明顯的動態(tài)回復(fù)和動態(tài)再結(jié)晶,在應(yīng)變速率為0.1s-1、1s-1溫度為1123K變形條件下發(fā)生孿生行為,造成流變應(yīng)力突變而升高,出現(xiàn)應(yīng)力谷值；經(jīng)改進(jìn)后的本構(gòu)模型,集成了變形溫度、變形速率及應(yīng)變對流變特性的影響,預(yù)測精度高,更利于通過計算機語言寫入有限元軟件分析計算。"/>

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

+高級檢索
Cu-Ag合金高溫流變特性及其改進(jìn)的本構(gòu)模型
DOI:
作者:
作者單位:

重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué),Institute for Materials Research,Tohoku University,Sendai -,Japan

作者簡介:

通訊作者:

中圖分類號:

TG146.11

基金項目:

中央高?；究蒲袠I(yè)務(wù)費資助項目(CDJZR14130006)


High temperature deformation properties and the modification of constitutive model of Cu-Ag alloy
Author:
Affiliation:

College of Material Science and Engineering,Chongqing University,College of Material Science and Engineering,Chongqing University,College of Material Science and Engineering,Chongqing University,College of Material Science and Engineering,Chongqing University,Institute for Materials Research,Tohoku University,Sendai -,Japan

Fund Project:

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

    在變形溫度為973～1123K和應(yīng)變速率0.01～10s-1條件下對Cu-6 wt.% Ag合金進(jìn)行等溫?zé)釅嚎s實驗。利用實驗所得流變應(yīng)力—應(yīng)變曲線,分析了高應(yīng)變速率下Cu-6 wt.% Ag合金高溫塑性變形時微觀組織的演變行為；研究了高溫塑性變形中材料的塑性變形機制；構(gòu)建了一種簡化的本構(gòu)模型,并引入Arrhenius方程及Z參數(shù)對模型進(jìn)行改進(jìn)。研究結(jié)果表明：Cu-6 wt.% Ag合金在熱塑性變形過程中發(fā)生了明顯的動態(tài)回復(fù)和動態(tài)再結(jié)晶,在應(yīng)變速率為0.1s-1、1s-1溫度為1123K變形條件下發(fā)生孿生行為,造成流變應(yīng)力突變而升高,出現(xiàn)應(yīng)力谷值；經(jīng)改進(jìn)后的本構(gòu)模型,集成了變形溫度、變形速率及應(yīng)變對流變特性的影響,預(yù)測精度高,更利于通過計算機語言寫入有限元軟件分析計算。

    Abstract:

    The hot deformation behavior of Cu-6 wt.% Ag alloy was described by hot compression tests in the temperature range of 973～1123K and stain rates of 0.01～10s-1. The microstructure evolution of the alloy was investigated in this paper. The true stress-strain curves were studied to reveal the hot deformation mechanism of Cu-6 wt.% Ag alloy. A simple constitutive model was established. The Arrhenius equation and Z were quoted in this investigation to modified the model. The results show that the dynamic recovery, dynamic recrystallization occurred in Cu-6 wt.% Ag alloy during hot deformation. And twinning behavior was observed at the strain rates of 0.1s-1 and 1s-1 temperature of 1123K. This twining behavior result in sharp changing of flow stress. With the increase of flow stress, a valley of stress was observed directly. The modified model which integrated the influence of temperature, strain rates, strain on flow characteristic could predict the stress accurately and be compiled easily.

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

王夢寒,孟 烈,危 康,岳宗敏,汪豐林. Cu-Ag合金高溫流變特性及其改進(jìn)的本構(gòu)模型[J].稀有金屬材料與工程,2017,46(12):3733~3738.[Wang Menghan, Meng Lie, Wei Kang, Yue Zonmin, Wang Fenglin. High temperature deformation properties and the modification of constitutive model of Cu-Ag alloy[J]. Rare Metal Materials and Engineering,2017,46(12):3733~3738.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2015-10-01
  • 最后修改日期:2016-01-07
  • 錄用日期:2016-02-24
  • 在線發(fā)布日期: 2018-01-04
  • 出版日期: