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雙態(tài)組織Ti80合金的動態(tài)再結(jié)晶行為
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河南科技大學(xué)

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中圖分類號:

146.23

基金項目:

河南省杰出人才創(chuàng)新基金；河南省重點攻關(guān)項目


Dynamic recrystallization behavior of Ti80 alloy with bimodal structure
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Henan University of Science and Technology

Fund Project:

Henan Outstanding Person Foundation；Henan Provincial Key Research Project

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    摘要:

    采用 Gleeble-1500 熱模擬實驗機(jī)對雙態(tài)組織Ti80合金在變形溫度為860-980℃、應(yīng)變速率為 0.01~1變形條件下進(jìn)行了熱壓縮模擬實驗，研究了合金熱變形過程中的流變應(yīng)力行為，利用加工硬化率確定了不同變形條件下動態(tài)再結(jié)晶臨界應(yīng)變。結(jié)果表明，動態(tài)再結(jié)晶是Ti80合金熱變形過程中的重要軟化機(jī)制，并發(fā)現(xiàn)動態(tài)再結(jié)晶臨界應(yīng)變隨溫度的升高和應(yīng)變速率的降低而減小?；赯參數(shù)和改進(jìn)后的Avrami方程，構(gòu)建了Ti80合金動態(tài)再結(jié)晶臨界應(yīng)變與動力學(xué)模型。

    Abstract:

    The thermal compression tests of Ti80 alloy with bimodal microstructure was conducted at the deformation temperature of 860-980℃ and the strain rate of 0.01~1s^(-1)on the Gleeble-1500 thermal-mechanical simulator. The flow stress and dynamic recrystallization behavior of the alloy during hot deformation were investigated, the critical strain of dynamic recrystallization was determined with the help of the work hardening rate. The results show that dynamic recrystallization is an important softening mechanism during hot deformation of Ti80 alloy, and the critical strain of dynamic recrystallization decreases with increasing temperature and decreasing strain rate. Based on the Z parameter and the improved Avrami equation, the critical strain and kinetics model for dynamic recrystallization of Ti80 alloy were constructed.

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魯龍龍,張彥敏.雙態(tài)組織Ti80合金的動態(tài)再結(jié)晶行為[J].稀有金屬材料與工程,2021,50(8):2979~2985.[Lu Longlong, Zhan Yanmin. Dynamic recrystallization behavior of Ti80 alloy with bimodal structure[J]. Rare Metal Materials and Engineering,2021,50(8):2979~2985.]
DOI：10.12442/j. issn.1002-185X.20200692

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  • 收稿日期:2020-09-11
  • 最后修改日期:2020-10-28
  • 錄用日期:2020-11-13
  • 在線發(fā)布日期: 2021-09-07
  • 出版日期: 2021-08-31