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拉伸取向控制對AZ31鎂合金孿生和織構演化的影響
作者:
作者單位:

1.常州工學院 力學與表面工程系，江蘇 常州 213032;2.太原科技大學 材料科學與工程學院，山西 太原 030024

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基金項目:

常州市科技計劃項目“軌道交通制動系統(tǒng)核心部件綠色智能制造關鍵技術合作研發(fā)”（No.CZ20210034），國家重點研發(fā)計劃（No.2018YFB1307902），國家自然科學基金（No.52175353），山西省青年拔尖人才項目，山西省青年科學基金（No.201901D211312），山西省高校優(yōu)秀青年學術帶頭人（No.2019045），山西省高校優(yōu)秀成果培育項目（No.2019KJ028），山西省研究生教育創(chuàng)新項目（No.2019SY482），山西省重點研發(fā)項目（No.201903D121043），太原科技大學研究生教育創(chuàng)新項目（No.SY2022005）。


Effect of Tensile Orientation on Twinning and Texture Evolution of AZ31 Magnesium Alloy
Author:
Affiliation:

1.Department of Mechanics and Surface Engineering, Changzhou Institute of Technology, Changzhou 213032, China;2.School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

Fund Project:

Changzhou Science and Technology Plan Project “Green Intelligent Manufacturing Key Technology Cooperation for Rail Transit Brake System Core Components” (CZ20210034); National Key Research and Development Project (2018YFB1307902); National Natural Science Foundation of China (52175353); Shanxi Young Top Talent Project, Shanxi Province Science Foundation for Youths (201901D211312); Excellent Young Academic Leaders in Shanxi Colleges and Universities (2019045); Excellent Achievements Cultivation Project of Shanxi Higher Education Institutions (2019KJ028); Shanxi Graduate Education Innovation Project (2019SY482); Key Research and Development Projects of Shanxi Province (201903D121043); Taiyuan University of Science and Technology Graduate Education Innovation Project (SY2022005)

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    摘要:

    以室溫單軸拉伸實驗與晶體塑性有限元相結合的方法，通過拉伸取向控制，研究了AZ31鎂合金拉伸變形過程中孿生行為、織構演化規(guī)律、塑性各向異性之間的關系。基于率相關晶體塑性本構理論，建立了滑移和孿生機制耦合的具有不同取向的晶體塑性本構模型，引入孿晶體積分數(shù)研究孿生對AZ31鎂合金塑性變形過程中織構演變和力學性能的影響。結果表明，2種不同取向的樣品在塑性變形過程中呈現(xiàn)出明顯不同的織構演變規(guī)律，表現(xiàn)出明顯的各向異性。軸向拉伸時孿生被抑制，孿晶激活體積分數(shù)低，徑向拉伸時孿晶極易產(chǎn)生，孿晶激活體積分數(shù)高。軸向試樣在整個塑性變形過程中｛0001｝極圖偏移較小，徑向試樣因大量拉伸孿晶的開啟，使得｛0001｝棱柱面織構的極密度逐漸向RD的正反方向發(fā)生明顯偏移。

    Abstract:

    The relationship between the twin behavior, the evolution law of texture and the plastic anisotropy of AZ31 magnesium alloy during tensile deformation was studied by combining room temperature uniaxial tensile experiment with crystal plastic finite element through tensile orientation control. Based on the rate-dependent crystal plastic constitutive theory, a plastic constitutive model of crystals with different orientations coupled by slip and twin mechanisms was established, and the effect of twins on the structural evolution and mechanical properties of AZ31 magnesium alloy during plastic deformation was studied by introducing twin crystal integrals. Results show that the specimens with two different orientations show significantly different texture evolution laws during the plastic deformation process, and exhibit obvious anisotropy. When the specimen is axially stretched, the twin is suppressed, and the twin activation volume fraction is low. The twin crystal is easily generated when the specimen is radially stretched, and the twin activation volume fraction is high. The axial specimen has a small shift in the {0001} polar map throughout the plastic deformation process, and the radial specimen has a significant shift in the polar density of the {0001} prismatic surface texture gradually towards the positive and negative directions of RD due to the activation of a large number of tensile twins.

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曹霞,徐吉,楊博文,馬川川.拉伸取向控制對AZ31鎂合金孿生和織構演化的影響[J].稀有金屬材料與工程,2023,52(4):1238~1243.[Cao Xia, Xu Ji, Yang Bowen, Ma Chuanchuan. Effect of Tensile Orientation on Twinning and Texture Evolution of AZ31 Magnesium Alloy[J]. Rare Metal Materials and Engineering,2023,52(4):1238~1243.]
DOI：10.12442/j. issn.1002-185X.20220777

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  • 收稿日期:2022-10-05
  • 最后修改日期:2023-03-23
  • 錄用日期:2022-11-24
  • 在線發(fā)布日期: 2023-04-28
  • 出版日期: 2023-04-25