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擠壓態(tài)生物可降解鎂合金Mg-2Zn-1Y-0.5Zr的顯微組織、力學(xué)性能和腐蝕行為
作者:
作者單位:

1.河南科技大學(xué) 材料科學(xué)與工程學(xué)院，河南 洛陽 471023;2.有色金屬協(xié)同創(chuàng)新中心，河南 洛陽 471023;3.溫州大學(xué)，浙江 溫州 325000;4.大連理工大學(xué)，遼寧 大連 116024

作者簡(jiǎn)介:

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中圖分類號(hào):

TG376

基金項(xiàng)目:

河南省自然基金 ( No. 162300410213)


Microstructure, Mechanical Properties and Corrosion Behavior of Biodegradable As-extruded Mg-2Zn-1Y-0.5Zr Alloys
Author:
Affiliation:

1.School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;2.Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, China;3.Wenzhou University, Wenzhou 325000, China;4.Dalian University of Technology, Dalian 116024, China

Fund Project:

Natural Science Foundation of Henan Province, China (162300410213)

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    摘要:

    研究了擠壓溫度對(duì)擠壓態(tài)Mg-2Zn-1Y-0.5Zr生物可降解鎂合金動(dòng)態(tài)再結(jié)晶、織構(gòu)和拉伸性能的影響，基于顯微組織和腐蝕形態(tài)闡述了擠壓態(tài)合金在模擬體液中的腐蝕機(jī)理。結(jié)果表明，在440 ℃（E440）下擠壓的合金出現(xiàn)雙峰結(jié)構(gòu)，具有粗大的未再結(jié)晶（unDRXed）晶粒和細(xì)小的再結(jié)晶（DRXed）晶粒。未再結(jié)晶區(qū)域的變形晶粒對(duì)織構(gòu)強(qiáng)度的影響最大。460 ℃的擠壓合金（E460）具有均勻的再結(jié)晶晶粒，晶粒細(xì)化后拉伸性能顯著改善。同時(shí)，均勻的再結(jié)晶晶粒會(huì)弱化織構(gòu)強(qiáng)度。E460的樣品表現(xiàn)出最佳耐腐蝕性，腐蝕速率為0.669±0.017 mm·a-1。

    Abstract:

    The effects of extrusion temperature on dynamic recrystallization, texture and tensile properties of biodegradable Mg-2Zn-1Y-0.5Zr alloys were studied, and the corrosion mechanisms of as-extruded alloys in SBF solution were elaborated. The results show that the extruded alloy at 440 ℃ (E440) has a bimodal structure with coarse unrecrystallized (unDRXed) grains and fine recrystallized (DRXed) grains. The deformed grains from unDRXed region make the greatest contribution to the texture strength. The extruded alloy at 460 ℃ (E460) has uniform DRXed grains, and its excellent tensile properties reveal a dominance of fine grain strengthening. Simultaneously, the uniform DRXed grains are good for the weakening of texture strength. The E460 sample exhibits the best corrosion resistance with a corrosion rate of 0.669 ± 0.017 mm·a-1.

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賀俊光,徐大召,文九巴,師慧娜,王揚(yáng)帆,任曉磊.擠壓態(tài)生物可降解鎂合金Mg-2Zn-1Y-0.5Zr的顯微組織、力學(xué)性能和腐蝕行為[J].稀有金屬材料與工程,2022,51(2):474~483.[He Junguang, Xu Dazhao, Wen Jiuba, Shi Huina, Wang Yangfan, Ren Xiaolei. Microstructure, Mechanical Properties and Corrosion Behavior of Biodegradable As-extruded Mg-2Zn-1Y-0.5Zr Alloys[J]. Rare Metal Materials and Engineering,2022,51(2):474~483.]
DOI：10.12442/j. issn.1002-185X.20200996

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  • 收稿日期:2020-12-25
  • 最后修改日期:2022-02-21
  • 錄用日期:2021-05-12
  • 在線發(fā)布日期: 2022-03-03
  • 出版日期: 2022-02-28