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TA1/AZ31B多層復(fù)合材料在熱模擬過程中的變形行為研究
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1.西安建筑科技大學(xué);2.金川集團有限公司

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基金項目:

國家自然科學(xué)基金項目（面上項目，重點項目，重大項目）；國家鎳鈷資源綜合利用重點實驗室基金；西安市科技計劃項目；西安建筑科技大學(xué)研究基金


Study on the Deformation Behaviors of TA1/AZ31B multi-layer Composites during Isothermally Compression Processing
Author:
Affiliation:

1.Xi`an University of Architecture and Technology;2.Jinchuan Group Co., LTD,

Fund Project:

National Natural Science Foundation of China (Grant 51874226); State Key Laboratory of Nickel and Cobalt Resource integrated utilization (Grant 301170504); Xi "an science and technology planning project (Grant 201805033YD11CG17(8)); Xi’an University of Architecture & Technology (Grant JC1507).

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    摘要:

    本文采用等溫壓縮試驗研究了在變形溫度為573K-723K，應(yīng)變速率范圍為0.01s-1-10s-1，壓下量30%-50%的條件下TA1/AZ31B多層復(fù)合材料的塑性變形行為并利用光學(xué)顯微鏡觀察顯微組織的變化。研究表明：TA1和AZ31B在壓縮復(fù)合過程中均發(fā)生塑性變形，但是鈦鎂多層復(fù)合材料各層的變形不同時且不均勻，AZ31B層的變形程度大于TA1層，且在變形過程中AZ31B層發(fā)生了動態(tài)再結(jié)晶。當(dāng)應(yīng)變速率為10s-1時，中間TA1層出現(xiàn)頸縮和斷裂。計算結(jié)果證明Arrhenius本構(gòu)方程可以準確預(yù)測TA1/AZ31B多層復(fù)合材料的流動應(yīng)力行為，得到平均絕對相對誤差為3.976%，相關(guān)系數(shù)為0.991。此外，基于動態(tài)材料模型(DMM)理論建立了TA1/AZ31B多層復(fù)合材料在真應(yīng)變0.5下的加工圖，確定最佳工藝條件在723K溫度下，應(yīng)變速率為0.01s-1，此時最大功率耗散值為28%。同時，TA1/AZ31B多層復(fù)合材料的加工圖中存在一個不穩(wěn)定區(qū)域，即變形溫度范圍為573K ~ 692K時應(yīng)變速率范圍為0.6-10s-1。

    Abstract:

    In the present study, Isothermal compression tests were performed to investigate the hot deformation behavior of TA1/AZ31B multi-layer composites. Flow stress-strain curves were obtained for deformation at temperature from 573K to 723K with the strain rate range from 0.01s-1 to 10s-1, and the height reduction range from 30% to 50%. Effect of the strain on the flow stress, both TA1 and AZ31B had plastic deformation during the compression bonding process. However, all layers deformation of TA1/AZ31B multi-layer composite is not occur at the same time and not uniform. The deformation of AZ31B is larger than that of TA1, and AZ31B occurs dynamic recrystallization during the deformation process. When strain rate is 10s-1, the middle TA1 layer occurs necking and fracture. Based on the flow stress-strain curves, the Arrhenius-type constitutive equation could precisely predict the flow stress behavior of TA1/AZ31B multi-layer composite. Besides, the value of the correlation coefficient was 0.991 when that of average absolute relative error was 3.976%. The processing map at true strain of 0.5 for TA1/AZ31B multi-layer composite was developed using the dynamic materials model (DMM) theory. The processing map of isothermally compressed TA1/AZ31B multi-layer composite exhibited that the optimum parameters were determined at the temperature of 723K and the strain rate of 0.01s-1 with power dissipation’s maximum efficiency of 28%. In the meanwhile, there was one instability domain in the processing map of isothermally compressed TA1/AZ31B multi-layer composite, it is in the deformation temperature range from 573K to 692K and the strain rate range from 0.6s?1 to 10 s?1.

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引用本文

張兵,姚蘇,王秋雨,李娟,張東,趙田麗,王文,蔡軍,王快社. TA1/AZ31B多層復(fù)合材料在熱模擬過程中的變形行為研究[J].稀有金屬材料與工程,2020,49(6):1946~1956.[Zhang Bing,姚蘇,Wang Qiuyu, Li Juan, Zhang Dong, Zhao Tianli, Wang Wen, Cai Jun, Wang Kuaishe. Study on the Deformation Behaviors of TA1/AZ31B multi-layer Composites during Isothermally Compression Processing[J]. Rare Metal Materials and Engineering,2020,49(6):1946~1956.]
DOI：10.12442/j. issn.1002-185X.20190213

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  • 收稿日期:2019-03-15
  • 最后修改日期:2019-05-14
  • 錄用日期:2019-06-14
  • 在線發(fā)布日期: 2020-07-09
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