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基于BP網(wǎng)絡(luò)Ti-6Al-3Nb-2Zr-1Mo合金等溫壓縮流變應(yīng)力預(yù)測(cè)
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西北工業(yè)大學(xué),西部超導(dǎo)材料科技股份有限公司,西北工業(yè)大學(xué),西部超導(dǎo)材料科技股份有限公司,西部超導(dǎo)材料科技股份有限公司,西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué)

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國(guó)家自然科學(xué)基金資助項(xiàng)目(59493300);教育部博士點(diǎn)基金資助項(xiàng)目(9800462)


Isothermal compression flow stress prediction of Ti-6Al-3Nb-2Zr-1Mo alloy based on BP-ANN
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Affiliation:

State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,Western Superconducting Technologies Co., Ltd., Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an,Western Superconducting Technologies Co., Ltd., Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an

Fund Project:

National International Scientific and Technological Cooperation Projects (2013DFB50180); Shaanxi Province Science and Technology Integrated Innovation Project (2015KTTSG01-08)

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    摘要:

    通過(guò)對(duì)Ti-6Al-3Nb-2Zr-1Mo合金820-970℃, 0.001-1s-1條件下的熱模擬壓縮試驗(yàn)，得到不同變形條件下的高溫變形真應(yīng)力-真應(yīng)變曲線。基于此實(shí)驗(yàn)數(shù)據(jù)建立了該合金B(yǎng)P-ANN本構(gòu)預(yù)測(cè)模型和傳統(tǒng)的回歸模型。結(jié)果表明：兩個(gè)模型的最大相對(duì)誤差分別為4.35%和13.9%，平均絕對(duì)誤差A(yù)ARE分別為1.42%和6.53%，說(shuō)明BP-ANN模型具有較優(yōu)異的預(yù)測(cè)能力，此模型可作為Ti-6Al-3Nb-2Zr-1Mo鈦合金高溫變形本構(gòu)模型。

    Abstract:

    Elevated-temperature flow behavior of Ti-6Al-3Nb-2Zr-1Mo titanium alloy was investigated by conducting isothermal hot compression tests at strain rate from 0.001 to 1 s-1 and in the temperature range of 820~970 ℃ on Gleeble-3800 simulator. The BP-ANN and regression models were established based on the experimental flow stress. Results show that the absolute value of maximum relative error obtained from the ANN model and regression method were 4.35% and 13.9%, respectively. The average absolute relative errors are 1.42% and 6.53% corresponding to the ANN model and regression method, which demonstrates that BP-ANN has a better prediction precision, and it can be used as the constitutive model of Ti-6Al-3Nb-2Zr-1Mo titanium alloy.

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引用本文

陳海生,馮 勇,馬凡蛟,毛友川,劉向宏,張平祥,寇宏超,傅恒志.基于BP網(wǎng)絡(luò)Ti-6Al-3Nb-2Zr-1Mo合金等溫壓縮流變應(yīng)力預(yù)測(cè)[J].稀有金屬材料與工程,2016,45(6):1549~1553.[Chen Haisheng, Feng Yong, Ma Fanjiao, Mao Youchuan, Liu Xianghong, Zhang Pingxiang, Kou Hongchao, Fu Hengzhi. Isothermal compression flow stress prediction of Ti-6Al-3Nb-2Zr-1Mo alloy based on BP-ANN[J]. Rare Metal Materials and Engineering,2016,45(6):1549~1553.]
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  • 收稿日期:2015-12-02
  • 最后修改日期:2016-03-13
  • 錄用日期:2016-03-25
  • 在線發(fā)布日期: 2016-10-08
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