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AZ61鎂合金熱壓縮流變應(yīng)力及晶粒尺寸預(yù)測
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國家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(“973”計劃)(2007CB613704)；“十一五”國家支撐計劃（2007BAG06B04）；國家自然科學(xué)基金（50725413）


Forecast of Flow Stress and Grain Size of AZ61 Mg Alloy under Hot Compression
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    摘要:

    通過在Gleeble-1500D熱模擬試驗機(jī)上對AZ61鎂合金進(jìn)行熱模擬試驗，獲得等溫恒速單軸方向熱壓縮變形過程的流變應(yīng)力-應(yīng)變關(guān)系曲線。經(jīng)過分析和計算曲線的特征值，利用線性和非線性數(shù)值回歸方法建立峰值應(yīng)力、峰值應(yīng)變、再結(jié)晶晶粒尺寸等特征值與Zener-Hollomon參數(shù)即帶溫度補(bǔ)償?shù)膽?yīng)變速率因子Z的定量關(guān)系。流變應(yīng)力的預(yù)測計算值與實(shí)測值誤差在10%以內(nèi)，晶粒尺寸計算值與實(shí)測值誤差在5%以內(nèi)。

    Abstract:

    The uniaxial isothermal hot compression test of AZ61 magnesium alloy was carried out on Gleeble-1500D thermal-mechanical simulator, the flow stress-strain curves and other information of dynamic recrystallization were investigated by numerical analysis. The relations between Z and other characteristic values of dynamic recrystallization, including peak stress, peak strain and grain size, were developed by regression analysis. The numerical simulation model of flow stress was introduced, its predicted values were proved to be close to the measured values with errors not more than 10%. The errors between predicted values and measured values for grain size were not more than 5%.

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彭 建,潘復(fù)生,丁培道,湯愛濤,于 翔. AZ61鎂合金熱壓縮流變應(yīng)力及晶粒尺寸預(yù)測[J].稀有金屬材料與工程,2009,38(4):655~658.[Peng Jian, Pan Fusheng, Ding Peidao, Tang Aitao, Yu Xiang. Forecast of Flow Stress and Grain Size of AZ61 Mg Alloy under Hot Compression[J]. Rare Metal Materials and Engineering,2009,38(4):655~658.]
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  • 收稿日期:2008-06-25
  • 最后修改日期:2009-03-02
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