Effects of TiN Content on Microstructures and Properties of TiCoCrFeNiAlHigh-Entropy Alloy Composite Coating

HU Ji; SUI Xinmeng; ZHANG Lin; ZHAO Wei; ZHANG Weiping

doi:10.16080/j.issn1671-833x.2021.19.071

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Effects of TiN Content on Microstructures and Properties of TiCoCrFeNiAlHigh-Entropy Alloy Composite Coating

更新时间：2025-10-30

- Effects of TiN Content on Microstructures and Properties of TiCoCrFeNiAlHigh-Entropy Alloy Composite Coating
- Aeronautical Manufacturing Technology Vol. 64, Issue 19, Pages: 71-79(2021)
- 作者机构：
  
  大连理工大学,大连,116024
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2021.19.071
  CLC：
- Published：2021
- 稿件说明：
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胡记，隋欣梦，张林，肇威，张维平. TiN含量对Ti0.8 CoCrFeNiAl0.5高熵合金涂层组织与性能的影响[J]. 航空制造技术, 2021, 64(19): 71-79.

HU Ji, SUI Xinmeng, ZHANG Lin, ZHAO Wei, ZHANG Weiping. Effects of TiN Content on Microstructures and Properties of Ti0.8 CoCrFeNiAl0.5 High-Entropy Alloy Composite Coating. 航空制造技术, 2021, 64(19): 71-79.
胡记，隋欣梦，张林，肇威，张维平. TiN含量对Ti0.8 CoCrFeNiAl0.5高熵合金涂层组织与性能的影响[J]. 航空制造技术, 2021, 64(19): 71-79. DOI： 10.16080/j.issn1671-833x.2021.19.071.

HU Ji, SUI Xinmeng, ZHANG Lin, ZHAO Wei, ZHANG Weiping. Effects of TiN Content on Microstructures and Properties of Ti0.8 CoCrFeNiAl0.5 High-Entropy Alloy Composite Coating. 航空制造技术, 2021, 64(19): 71-79. DOI： 10.16080/j.issn1671-833x.2021.19.071.

摘要

为进一步改善高熵合金 Ti

0.8

CoCrFeNiAl

0.5

的硬度和耐磨性，利用激光熔覆技术在 TC21 钛合金表面制备不同 TiN 含量的 Ti

0.8

CoCrFeNiAl

0.5

/TiN 高熵合金复合涂层。采用扫描电子显微镜（SEM）、X 射线衍射仪（XRD）、电子探针（EPMA）对熔覆层的显微组织、物相成分进行检测与分析，选用显微硬度计和材料表面综合性能测试仪对熔覆层的硬度分布和耐磨性能进行表征。试验结果表明，熔覆层无明显缺陷，呈良好的冶金结合。未添加 TiN 时，熔覆层主要由BCC1、FCC、Laves 相、富β–Ti 相等物相组成；添加 TiN 后，熔覆层主要由富 Al–Co–Ni–Ti 的 BCC1相枝晶组织以及富 Fe–Cr–Ti 的 BCC2 相、Laves 相、富β–Ti 相组成的枝晶间组织与镶嵌在枝晶和枝晶间的 TiN 相构成。熔覆层的显微硬度均提高为基体的 2 倍以上，添加质量分数 8% TiN 熔覆层的硬度提高到未添加 TiN 熔覆层硬度的 1.23倍。当 TiN 添加质量分数为 6% 时，熔覆层耐磨性较好，约为未添加 TiN 熔覆层的 2.92 倍。TiN 的添加有利于促进熔覆层中 BCC 相的生成和 TiN 相析出，能有效提高熔覆层的硬度及耐磨性能。

Abstract

The work aims to further enhance the microhardness and wear resistance of high-entropy alloy (HEA) Ti

0.8

CoCrFeNiAl

0.5

. The Ti

0.8

CoCrFeNiAl

0.5

/TiN composite coatings with different TiN contents were prepared on the surface of TC21 by laser cladding. The microstructures and phases of cladding layer were analyzed with scanning electron microscopy (SEM)

X–ray diffractometry (XRD) and electron probe micr

oanalysis (EPMA). The hardness distribution and wear resistance of the cladding layer are characterized by the microhardness tester and the material surface comprehensive performance tester. The results showed that the cladding layer is formed well and has good metallurgical bonding. Without TiN

the cladding layer is mainly composed of BCC1

FCC

Laves phases and β–Ti. After adding TiN

TiN particles precipitate in-situ in the cladding layer. The cladding layer is mainly composed of dendritic structure of BCC1 phase rich in Al–Co–Ni–Ti

interdendritic structure of BCC2 phase rich in Fe–Cr–Ti and Laves phase

β–Ti and TiN particles embedded between dendritic structure and interdendritic structure. The microhardness of the cladding layer increases to more than 2 times of the substrate

and the hardness of the cladding layer with 8% TiN is 1.23 times of the sample without TiN. When the content of TiN is 6%

the wear resistance is high

which is about 2.92 times that of the sample without TiN. It reveals that the addition of TiN is beneficial to the precipitation of TiN particles and the formation of BCC phase in the cladding layer

which can effectively improve the hardness and wear resistance of the cladding layer.

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