Advanced wear protection at high temperatures: A study of Al 20 V 20 Cr 20 Nb (40-x) Mo x RHEA coatings on Ti6Al4V by laser cladding

被引：1

作者：

Liu, Hao ^{[1
]}

Huang, Can ^{[1
,2
,3
]}

Tu, Jian ^{[1
]}

Huang, Haozhen ^{[1
]}

Luo, Jinwei ^{[1
]}

Fang, Suiyuan ^{[1
]}

Peng, Shuoshu ^{[1
]}

Wang, Hanguang ^{[1
]}

Yang, Ling ^{[1
]}

Chang, Xia ^{[1
]}

Duan, Huming ^{[4
]}

机构：

[1] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China

[2] Chongqing Univ Technol, Chongqing Municipal Engn Res Ctr Inst Higher Educ, Chongqing 400054, Peoples R China

[3] Chongqing Univ Technol, Key Lab Adv Manufacture Technol Automobile Parts, Minist Educ, Chongqing 400054, Peoples R China

[4] Chongqing Mechatron Addit Mfg Co, Chongqing 400054, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2024年 / 673卷

关键词：

RHEAs; High-temperature tribology; Laser cladding; Ti6Al4V; HIGH-ENTROPY ALLOYS; PHASE-STABILITY; SOLID-SOLUTION;

D O I：

10.1016/j.apsusc.2024.160878

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al 20 V 20 Cr 20 Nb (40-x) Mo x Refractory High Entropy Alloys (RHEAs) coatings were applied to Ti6Al4V surfaces via laser cladding. These coatings, primarily in a single BCC phase with dendritic microstructures, demonstrated varied wear resistance. Notably, the Al 20 V 20 Cr 20 Nb 10 Mo 30 exhibited the highest wear resistance, achieving a wear rate reduction of 98.35 % and 99.28 % compared to uncoated Ti6Al4V and the Al 20 V 20 Cr 20 Nb 30 Mo 10 coating, respectively. This superior performance is attributed to the formation of a dense oxide film and the beneficial presence of rod-like Al2(MoO4)3 2 (MoO 4 ) 3 and Cr2(MoO4)3 2 (MoO 4 ) 3 oxides, which enhance mechanical clamping at the surface. The study highlights the critical role of rapid oxide film formation at 600 degrees C in enhancing the high- temperature wear resistance of Ti6Al4V, offering insights into the tribological behaviour of RHEA coatings under extreme conditions.

引用

页数：13

共 37 条

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