A Novel Compositional Design of [Cr-Fe4Co4Ni4]Cr2.6-xTixMo0.4 High-Entropy Alloy Coating Based on the Cluster-Plus-Glue-Atom Model and Its Mechanism of Resisting Strong Acid Erosion

被引：1
作者：
Ding, Kailu [1 ]
Wang, Zonglun [2 ]
Wu, Xianghai [2 ]
Shang, Xiaojuan [1 ]
Liu, Qibin [1 ,3 ]
机构：
[1] Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China
[2] Wengfu Grp Co Ltd, Guiyang 550025, Peoples R China
[3] Guizhou Univ, Coll Mat & Met, China Key Lab Modern Mfg Technol, Educ Minist, Guiyang 550025, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2023年 / 25卷 / 09期
基金：
中国国家自然科学基金;
关键词：
broadband laser cladding; cluster-plus-glue-atom model; corrosion resistance; high-entropy alloys (HEAs) coating; resisting strong acid erosion; wear resistance; CORROSION BEHAVIOR; SOLID-SOLUTION; MICROSTRUCTURE; PASSIVITY; RULES; STEEL;
D O I：
10.1002/adem.202201483
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To extend the service life of the agitator blade, a series of [Cr-Fe4Co4Ni4]Cr2.6-xTixMo0.4 (x = 0, 0.3, 0.6, and 0.9) high-entropy alloy (HEA) compositions based on the cluster-plus-glue-atom model is designed, and HEA coatings are deposited on 904L stainless steel using the laser cladding technique. The phase structure, microhardness, wear resistance, corrosion resistance, and erosion properties of the HEA coatings are determined using X-ray diffractometer, transmission electron microscope, a microhardness tester, a friction and wear tester, an electrochemical workstation, and an erosion testing machine, respectively. The coating's phase structure is made of FCC solid solution. The coatings' microhardness, wear, corrosion, and erosion resistance gradually improve by adding Ti. In particular, the microhardness of the [Cr-Fe4Co4Ni4]Cr1.7Ti0.9Mo0.4 coating reaches a peak value of 295.11 HV0.2, over 1.5 times that of the 904L stainless steel (190 HV0.2). Its specific wear rate (3.64 mm(3) N-1 m(-1)) is lower than that of the substrate (8.53 mm(3) N-1 m(-1)). The impedance of the [Cr-Fe4Co4Ni4]Cr1.7Ti0.9Mo0.4 coating is roughly 5.3 times of the 904L stainless steel. Simultaneously, the coating's cumulative volume loss rate of erosion-corrosion (0.054 mm(3) h(-1)) is lower than that of the substrate (0.063 mm(3) h(-1)). Consequently, the innovative HEA coating has an impressive overall performance.
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页数：12
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