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純鎂切應(yīng)力變形后的微觀組織演變、力學(xué)性能、腐蝕行為
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作者單位:

1.西安建筑科技大學(xué) 冶金工程學(xué)院，陜西 西安 710055;2.西北有色金屬研究院 陜西省醫(yī)用金屬材料重點實驗室，陜西 西安 710016;3.暨南大學(xué) 先進耐磨蝕及功能材料研究院，廣東 廣州 510632;4.東北大學(xué) 材料科學(xué)與工程學(xué)院，遼寧 沈陽 110819

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基金項目:

Key Research and Development Program of Shannxi(Nos.2019ZDLSF03-06); the National Natural Science Foundation of China (Nos. 51901193)


Microstructure Evolution, Mechanical Properties and Corro-sion Behavior of Pure Magnesium Deformed by Shear Stress
Author:
Affiliation:

1.School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;2.Shaanxi Key Laboratory of Biomedical Metal Materials, Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;3.Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China;4.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

Fund Project:

Key Research and Development Program of Shaanxi (2019ZDLSF03-06); National Natural Science Foundation of China (51901193)

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    摘要:

    純鎂為密排六方結(jié)構(gòu)，具有較少的獨立滑移系導(dǎo)致其塑性較差。研究了純鎂變形后的微觀組織演變、力學(xué)性能、腐蝕行為。結(jié)果表明，純鎂經(jīng)過等徑角擠壓（ECAP）變形后晶粒明顯細化以及基面織構(gòu)發(fā)生了弱化，導(dǎo)致純鎂的塑性得到了顯著地提高。等徑角擠壓變形后純鎂強度降低主要是因為基面織構(gòu)弱化影響大于晶粒細化。此外，等徑角擠壓變形后純鎂自腐蝕電位和腐蝕電流密度明顯增加，純鎂的抗腐蝕性能顯著提高。純鎂的腐蝕機理可能從局部腐蝕向均勻腐蝕轉(zhuǎn)變，從而減少了樣品在標(biāo)準(zhǔn)模擬體液浸泡中的腐蝕脫落，確保了試樣的完整性。

    Abstract:

    The close-packed hexagonal structure pure magnesium has few independent slip systems which result in poor plasticity. In the present paper, the pure magnesium was deformed by equal channel angular pressing (ECAP). Results show that due to grain refinement and weakening of base texture, plasticity of pure magnesium is significantly improved. The strength of pure magnesium decreases after ECAP deformation mainly because the influence of base texture weakening is greater than that of grain refinement. Moreover, the corrosion resistance of pure magnesium is significantly enhanced after shear stress deformation because of the increase of self-corrosion potential and corrosion current density. The corrosion mechanism of pure magnesium may change from local corrosion to uniform corrosion, which can reduce the corrosion falling and ensure the integrity of samples during immersion in the standard simulated body fluid.

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引用本文

代曉軍,楊西榮,荊磊,王嵐,程軍,余森,王昌,于振濤.純鎂切應(yīng)力變形后的微觀組織演變、力學(xué)性能、腐蝕行為[J].稀有金屬材料與工程,2021,50(8):2745~2751.[Dai Xiaojun, Yang Xirong, Jing Lei, Wang Lan, Cheng Jun, Yu Sen, Wang Chang, Yu Zhentao. Microstructure Evolution, Mechanical Properties and Corro-sion Behavior of Pure Magnesium Deformed by Shear Stress[J]. Rare Metal Materials and Engineering,2021,50(8):2745~2751.]
DOI：10.12442/j. issn.1002-185X.20200439

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歷史
  • 收稿日期:2020-06-23
  • 最后修改日期:2021-07-29
  • 錄用日期:2020-08-04
  • 在線發(fā)布日期: 2021-09-07
  • 出版日期: 2021-08-31