-1的條件下,通過(guò)INSPEKT Table 100kN電子萬(wàn)能高溫實(shí)驗(yàn)機(jī)對(duì)軋制態(tài)ME20M鎂合金進(jìn)行了熱拉伸實(shí)驗(yàn),分析了變形溫度和應(yīng)變速率對(duì)材料流動(dòng)應(yīng)力的影響,建立了熱變形條件下的本構(gòu)模型及加工圖。研究結(jié)果表明：隨著變形溫度的降低和應(yīng)變速率的升高,軋制態(tài)ME20M鎂合金的流動(dòng)應(yīng)力增加；建立的本構(gòu)模型預(yù)測(cè)峰值應(yīng)力與實(shí)驗(yàn)結(jié)果吻合較好,平均相對(duì)誤差為5.19%；考慮應(yīng)變對(duì)本構(gòu)模型中材料常數(shù)影響后的預(yù)測(cè)應(yīng)力值與實(shí)驗(yàn)值的相關(guān)度較高,平均相對(duì)誤差為6.00%；最佳熱加工范圍為673~773K、應(yīng)變速率0.001~0.01 s-1。"/>

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軋制態(tài)ME20M鎂合金熱拉伸變形行為及加工圖
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先進(jìn)鍛壓成形技術(shù)與科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室(燕山大學(xué))

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國(guó)家自然科學(xué)基金資助項(xiàng)目(項(xiàng)目號(hào)51275444;51705448)；河北省自然科學(xué)基金資助項(xiàng)目(項(xiàng)目號(hào)E2018203254)；河北省科技計(jì)劃項(xiàng)目(項(xiàng)目11212104D;15215325)


Hot Tensile Deformation Behavior and Processing Map of rolled ME20M Magnesium Alloy
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Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University), Ministry of Education of China

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    摘要:

    在變形溫度為623~773K,應(yīng)變速率為0.001~0.1s-1的條件下,通過(guò)INSPEKT Table 100kN電子萬(wàn)能高溫實(shí)驗(yàn)機(jī)對(duì)軋制態(tài)ME20M鎂合金進(jìn)行了熱拉伸實(shí)驗(yàn),分析了變形溫度和應(yīng)變速率對(duì)材料流動(dòng)應(yīng)力的影響,建立了熱變形條件下的本構(gòu)模型及加工圖。研究結(jié)果表明：隨著變形溫度的降低和應(yīng)變速率的升高,軋制態(tài)ME20M鎂合金的流動(dòng)應(yīng)力增加；建立的本構(gòu)模型預(yù)測(cè)峰值應(yīng)力與實(shí)驗(yàn)結(jié)果吻合較好,平均相對(duì)誤差為5.19%；考慮應(yīng)變對(duì)本構(gòu)模型中材料常數(shù)影響后的預(yù)測(cè)應(yīng)力值與實(shí)驗(yàn)值的相關(guān)度較高,平均相對(duì)誤差為6.00%；最佳熱加工范圍為673~773K、應(yīng)變速率0.001~0.01 s-1。

    Abstract:

    The hot tensile deformation behaviors of rolled ME20M magnesium alloy at temperatures of 623-773K and strain rates of 0.001-0.1s-1 were studied by INSPEKT Table 100kN universal high temperature experimental machine. The effects of deformation temperature and strain rate on the flow stress of the material were analyzed, and the constitutive model and processing map under hot deformation conditions were established. The results show that the flow stress of the rolled ME20M magnesium alloy increases with the decrease of deformation temperature or the increase of strain rate. The predicted peak stress of the constitutive model is in good agreement with the experimental results, and the average relative error is 5.19%. After considering the influence of strain on the material constant in the constitutive model, the predicted stress value is highly correlated with the experimental value, and the average relative error is 6.00%. The best hot working range is 673-773K, the strain rate of 0.001-0.01 s-1.

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楊柳,官英平,段永川,屈曉陽(yáng).軋制態(tài)ME20M鎂合金熱拉伸變形行為及加工圖[J].稀有金屬材料與工程,2020,49(5):1715~1721.[Yang Liu, Guan Yingping, Duan Yongchuan, Qu Xiaoyang. Hot Tensile Deformation Behavior and Processing Map of rolled ME20M Magnesium Alloy[J]. Rare Metal Materials and Engineering,2020,49(5):1715~1721.]
DOI：10.12442/j. issn.1002-185X.20190174

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  • 收稿日期:2019-03-03
  • 最后修改日期:2019-04-25
  • 錄用日期:2019-05-14
  • 在線發(fā)布日期: 2020-06-05
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