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壓縮道次對ZK60鎂合金力學(xué)性能和腐蝕行為影響
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1.廣東海洋大學(xué)(陽江校區(qū)) 材料科學(xué)與工程學(xué)院，廣東 陽江 529500;2.黑龍江科技大學(xué) 材料科學(xué)與工程學(xué)院，黑龍江 哈爾濱 150022;3.佳木斯大學(xué) 材料科學(xué)與工程學(xué)院，黑龍江 佳木斯 154007

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廣東海洋大學(xué)科研啟動項目(060302062310)


Effect of Compression Passes on Mechanical Properties and Corrosion Behavior of ZK60 Magnesium Alloy
Author:
Affiliation:

1.School of Materials Science and Engineering, YangJiang Campus, Guangdong Ocean University, Yangjiang529500, China;2.School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin150022, China;3.School of Materials Science and Engineering, Jiamusi University, Jiamusi154007, China

Fund Project:

Guangdong Ocean University Research Launch Project (060302062310)

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    摘要:

    研究了多向壓縮道次對ZK60鎂合金組織、力學(xué)性能和腐蝕行為的影響。結(jié)果表明，鑄態(tài)ZK60鎂合金枝晶偏析較為嚴(yán)重，晶界處分布著粗大的MgZn相。當(dāng)壓縮道次增加到9道次時，晶界處的粗大凝固相顯著細(xì)化，并發(fā)生回溶，大晶粒周圍的局部區(qū)域出現(xiàn)細(xì)小的再結(jié)晶晶粒，并在再結(jié)晶晶粒周圍析出細(xì)小彌散的納米相。隨著壓縮道次的增加，ZK60鎂合金的抗拉伸強(qiáng)度總體呈上升趨勢，壓縮率呈下降趨勢，9道次時抗壓強(qiáng)度為433.6 MPa，壓縮率為21.3%。多向壓縮可顯著降低ZK60鎂合金在模擬體液中的降解率，對于鑄態(tài)ZK60鎂合金，微觀偏析容易導(dǎo)致嚴(yán)重的晶內(nèi)局部腐蝕，但是經(jīng)過多向壓縮后，晶內(nèi)局部腐蝕傾向明顯減弱。

    Abstract:

    The impact of multi-directional compression passes on the microstructure, mechanical properties, and corrosion behavior of ZK60 magnesium alloy was investigated. Results reveal that severe dendrite segregation exists in the as-cast ZK60 magnesium alloy with coarse MgZn phases distributed along the grain boundaries. After 9 passes of compression, the coarse solidified phases at the grain boundary are significantly refined, and back dissolution occurs. Fine recrystallized grains accompanied with the fine diffused nano-phases emerge in the local area around the large grains. The tensile strength of ZK60 magnesium alloy generally exhibits the upward trend with the increase in compression passes, whereas the compression rate shows the downward trend. The compressive strength reaches 433.6 MPa with the compression rate of 21.3% after 9 passes of compression. Multi-directional compression can significantly reduce the degradation rate of ZK60 magnesium alloy in simulated body fluids. Furthermore, it is observed that in the as-cast ZK60 magnesium alloy, micro-segregation can easily lead to severe intragranular local corrosion. However, after multi-directional compression, the tendency to intragranular local corrosion is significantly diminished.

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尹冬松,劉志遠(yuǎn),張游游,毛勇,韓天明.壓縮道次對ZK60鎂合金力學(xué)性能和腐蝕行為影響[J].稀有金屬材料與工程,2024,53(12):3338~3347.[Yin Dongsong, Liu Zhiyuan, Zhang Youyou, Mao Yong, Han Tianming. Effect of Compression Passes on Mechanical Properties and Corrosion Behavior of ZK60 Magnesium Alloy[J]. Rare Metal Materials and Engineering,2024,53(12):3338~3347.]
DOI：10.12442/j. issn.1002-185X.20240102

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  • 收稿日期:2024-02-28
  • 最后修改日期:2024-08-21
  • 錄用日期:2024-08-26
  • 在線發(fā)布日期: 2024-12-19
  • 出版日期: 2024-12-16