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復(fù)合細(xì)化超細(xì)晶純鋯動(dòng)態(tài)再結(jié)晶模型的研究
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作者單位:

1.太原科技大學(xué);2.西安建筑科技大學(xué);3.晉中學(xué)院

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基金項(xiàng)目:

中國(guó)國(guó)家自然科學(xué)基金、〝三晉學(xué)者〞項(xiàng)目


Dynamic Recrystallization Model Of Ultrafine grained Pure Zirconium Refined by Compounding
Author:
Affiliation:

1.Taiyuan University of Science and Technology;2.Xi''an University of Architecture and Technology;3.Jinzhong University

Fund Project:

The Chinese?National?Natural?Science?Foundation (51675362); The “The Young SAN JIN Scholars” Program. S.

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    摘要:

    采用Gleeble-3800熱模擬實(shí)驗(yàn)機(jī)對(duì)晶粒尺寸為200-250 nm的復(fù)合細(xì)化超細(xì)晶純鋯在變形溫度為300°C～450°C，應(yīng)變速率為0.001～0.05s-1的范圍內(nèi)進(jìn)行單向熱壓縮實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果表明：熱加工參數(shù)對(duì)超細(xì)晶純鋯流動(dòng)應(yīng)力影響很大。通過(guò)實(shí)驗(yàn)數(shù)據(jù)以及顯微組織分析，在較高的變形溫度和較低的應(yīng)變速率的情況下更容易發(fā)生動(dòng)態(tài)再結(jié)晶；構(gòu)建超細(xì)晶純鋯的臨界應(yīng)變模型，得出其溫度補(bǔ)償應(yīng)變速率因子Z與 (臨界應(yīng)變)， (臨界應(yīng)力)， (峰值應(yīng)變)和 (峰值應(yīng)力)間的關(guān)系；建立了超細(xì)晶純鋯動(dòng)態(tài)再結(jié)晶體積分?jǐn)?shù)模型，可以看出其動(dòng)態(tài)再結(jié)晶發(fā)生的階段為應(yīng)變0.1～0.45。

    Abstract:

    An ultrafine-grained (UFG) pure zirconium(Zr) refined by compounding with a size of Φ4 × 6 mm was subjected to a unidirectional compression test using a Gleeble-3800 thermal simulation tester at the temperature of 300 °C–450 °C and a strain rate range of 0.001–0.05 s-1. Experimental results show that the process parameters influence the flow stress of the UFG pure zirconium. Experimental data and microstructure analysis, reveal that DRX is more likely to occur at higher deformation temperature and lower strain rate. The critical strain and critical stress of UFG pure zirconium were determined. In addition, a critical strain model of UFG pure zirconium was established by introducing Zener–Hollomon paramete Z. The constitutive model of UFG pure zirconium was confirmed based on DRX volume fraction and proven to occur at a strain of 0.1 to 0.45.

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引用本文

韓培盛,馬煒杰,李艷威,朱曉宇,楊西榮,王效崗.復(fù)合細(xì)化超細(xì)晶純鋯動(dòng)態(tài)再結(jié)晶模型的研究[J].稀有金屬材料與工程,2021,50(2):504~510.[Han Peisheng, Ma Weijie, Li Yanwei, Zhu Xiaoyu, Yang Xirong, Wang Xiaogang. Dynamic Recrystallization Model Of Ultrafine grained Pure Zirconium Refined by Compounding[J]. Rare Metal Materials and Engineering,2021,50(2):504~510.]
DOI：10.12442/j. issn.1002-185X.20200072

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  • 收稿日期:2020-02-08
  • 最后修改日期:2020-03-17
  • 錄用日期:2020-03-19
  • 在線(xiàn)發(fā)布日期: 2021-03-09
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