铝合金表面激光沉积Al<sub>0.8</sub>FeCoNiCrCu<sub><italic style="font-style: italic">x</italic></sub>高熵合金组织与耐蚀性能

李彦洲; 石岩

doi:10.3788/OPE.20202804.0914

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铝合金表面激光沉积Al_0.8FeCoNiCrCu_x高熵合金组织与耐蚀性能

微纳技术与精密机械 | 更新时间：2020-08-13

- 铝合金表面激光沉积Al_0.8FeCoNiCrCu_x高熵合金组织与耐蚀性能
- Microstructure and crossion resistance of laser deposition of Al_0.8FeCoNiCrCu_x high-entropy alloy on aluminum alloy
- 光学精密工程 2020年28卷第4期页码：914-922
- 作者机构：
  
  1.长春理工大学机电工程学院, 吉林长春 130022
  2.长春理工大学国家国际科技合作基地, 吉林长春 130022
  3.吉林工业职业技术学院机电与智能技术学院，吉林吉林 132000
- 作者简介：
  
  [ "李彦洲(1988-)，男，吉林吉林人，讲师，博士研究生，2014年于长春工业大学获得硕士学位，目前主要从事激光增材制造、材料表面改性的相关研究。E-mail: 2721589336@qq.com" ]
- 基金信息：
  
  装备预研领域基金资助项目(No.JZX7Y20190263073101)
- DOI：10.3788/OPE.20202804.0914
  中图分类号： TG456.7
- 收稿日期：2019-11-25，
  
  修回日期：2019-01-21，
  
  录用日期：2019-1-21，
  
  纸质出版日期：2020-04-15
- 稿件说明：
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李彦洲, 石岩. 铝合金表面激光沉积Al_0.8FeCoNiCrCu_x高熵合金组织与耐蚀性能[J]. 光学精密工程, 2020,28(4):914-922.

Yan-zhou LI, Yan SHI. Microstructure and crossion resistance of laser deposition of Al_0.8FeCoNiCrCu_x high-entropy alloy on aluminum alloy[J]. Optics and precision engineering, 2020, 28(4): 914-922.
李彦洲, 石岩. 铝合金表面激光沉积Al_0.8FeCoNiCrCu_x高熵合金组织与耐蚀性能[J]. 光学精密工程, 2020,28(4):914-922. DOI： 10.3788/OPE.20202804.0914.

Yan-zhou LI, Yan SHI. Microstructure and crossion resistance of laser deposition of Al_0.8FeCoNiCrCu_x high-entropy alloy on aluminum alloy[J]. Optics and precision engineering, 2020, 28(4): 914-922. DOI： 10.3788/OPE.20202804.0914.

摘要

为增强5XXX系铝合金表面的耐蚀性能，利用脉冲激光沉积技术制备了Al

0.8

FeCoNiCrCu

高熵合金(HEA)涂层。利用XRD，SEM和电化学工作站分析了Al

0.8

FeCoNiCrCu

高熵合金的相结构、微观组织和耐腐蚀性能。结果表明：随着Cu含量增加，合金的相结构由BCC1和BCC2相转变为BCC1，BCC2和FCC相；当=0时，Al

0.8

FeCoNiCrCu

涂层沿晶间出现裂纹，

=0.25时，涂层裂纹消失，并且在晶间出现了浅色组织，随着

增加，浅色组织由点状分布转变为连续生长；Al

0.8

FeCoNiCrCu

(

=0.25，0.5，0.75，1.0)高熵合金涂层耐蚀性随Cu增加而降低，Al

0.8

FeCoNiCrCu

0.25

的腐蚀电流密为7.94×10

-8

A/cm

仅为基材的0.17%，腐蚀形式为点蚀，当

增加至1时，腐蚀电流密度增至8.21×10

-7

A/cm

为基材的1.99%，腐蚀形式转变为晶间腐蚀，但仍优于基材。显然，当0.25≤

≤1时，采用Al

0.8

FeCoNiCrCu

涂层可显著改善铝合金的耐腐蚀性能。同时，其具有的高熵效应可抑制涂层中由基材的稀释行为引起的金属间化合物形成，解决了传统涂层材料应用在铝合金表面易产生裂纹的问题。

Abstract

To improve thecorrosion resistance of the 5xxx aluminum alloy surface

0.8

FeCoNiCrCu

(

0.25

0.5

0.75

1.0) coatings were prepared on the surface of the alloy vialaser deposition.The crystal texture

micro-structure

andcorrosion resistance of the deposition were analyzed via XRD

SEM and electrochemical workstations.The results demonstrate that with the increase in the quantity of Cu

the phase structure of the HEA changes from BCC1 and BCC2 to BCC1

BCC2

and FCC. Furthermore

when

cracks appeared in the Al

0.8

FeCoNiCrCu

coating

and when

= 0.25

the cracks disappeared

and a light structure was observed in the interdendritic region. With the increase inx

the light structure changed from point distribution to continuous growth.The corrosion resistance of the alloy increased with the decrease in the quantity of Cu

the corrosion current density of Al

0.8

FeCoNiCrCu

0.25

high entropy-alloy coating was estimated to be 7.94×10

-8

A/cm

and the form of corrosion was ascertained to bepitting.Additionally

the corrosion current density of Al

0.8

FeCoNiCrCuhigh entropy-alloy coating was ascertained to be 8.21×10

-7

A/cm

. It also exhibited obvious intercrystalline corrosion

but was still superior to the substrate.This demonstrates that Al

0.8

FeCoNiCrCu

HEA(0.25≤

≤1) can be used as a coating to enhance the corrosion resistance of aluminum

and its high entropy effect can simultaneously inhibit the formation of inter-metallic compounds caused by the dilution of the substrate. This therefore addresses the problem of crack formation in coatings prepared with traditional materials.

关键词

Keywords

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铝合金表面激光沉积Al0.8FeCoNiCrCux高熵合金组织与耐蚀性能

Microstructure and crossion resistance of laser deposition of Al0.8FeCoNiCrCux high-entropy alloy on aluminum alloy

DOI：10.3788/OPE.20202804.0914

摘要

Abstract

关键词

Keywords

references

铝合金表面激光沉积Al_0.8FeCoNiCrCu_x高熵合金组织与耐蚀性能

Microstructure and crossion resistance of laser deposition of Al_0.8FeCoNiCrCu_x high-entropy alloy on aluminum alloy