Effect of Aging Treatment on Microstructure and Wear Properties of CoCrFeNiTiNbB1.25 High Entropy Alloys Coatings by Laser Cladding

2021 ◽  
Vol 13 (7) ◽  
pp. 1280-1288
Author(s):  
Lin Ding ◽  
Hongxin Wang ◽  
Xiumin Quan
Keyword(s):  
Abrasive Wear ◽  
Mass Loss ◽  
Laser Cladding ◽  
Volume Fraction ◽  
Aging Treatment ◽  
Treatment Temperature ◽  
High Entropy Alloys ◽  
Wear Properties ◽  
H13 Steel ◽  
High Entropy

ABSTRACTLaser cladding CoCrFeNiTiNbB1.25 high entropy alloys (HEAs) coatings on H13 steel was fabricated. The effect of aging treatment temperature on microstructure and wear resistance of the HEAS coatings was investigated. Results showed the phases of the HEAs coatings were not changed as the aging treatment increased, the volume fraction of TiB phase was firstly increased, then reduced. The diffraction peak of fcc phase was firstly shifted to the right, and then shifted to the left. The HEAs coatings consisted of typical dendrite, interdendritic eutectic and dispersed intermetallic compound after aging treatment, and the dendrite obviously was coarsened after aging treatment at 850 °C. Compared with HEAs coatings before aging treatment, the microhardness of the HEAs coatings was firstly increased as the aging treatment temperature increased, then decreased, and the mass loss was opposite. The microhardness and mass loss was decreased by 4.3% and 11.9%, respectively for the aging treatment at 750 °C. The wear mechanism of the HEAs coatings before aging treatment was the abrasive wear, and was the abrasive wear and adhesive wear after aging treatment.

Microstructure and Abrasion Resistance of Laser Cladding CoCrFeNiTiNbB1.25 High-Entropy Alloys Coatings Treated by Aging

2021 ◽  
Vol 13 (8) ◽  
pp. 1479-1487
Author(s):  
Lin Ding ◽  
Hongxin Wang ◽  
Xiumin Quan
Keyword(s):  
Abrasive Wear ◽  
Mass Loss ◽  
Laser Cladding ◽  
Aging Temperature ◽  
Abrasion Resistance ◽  
Volume Fraction ◽  
High Entropy Alloys ◽  
H13 Steel ◽  
High Entropy ◽  
The Right

Laser cladding CoCrFeNiTiNbB1.25 high-entropy alloys coatings on H13 steel was fabricated. The microstructure and abrasion resistance of aged high-entropy alloys coatings at different temperature were researched. Results showed the phase was not changed in the high-entropy alloys coatings as the aging temperature elevated, the volume fraction of TiB phase was firstly increased, then reduced. The diffraction peak of fcc phase was firstly shifted to the right, and then shifted to the left. The aged high-entropy alloys coatings consisted of typical dendrite, interdendritic eutectic and dispersed intermetallic compound, and the dendrite obviously was coarsened after aging at 850 °C. Compared with non-aged high-entropy alloys coatings, the microhardness of aged high-entropy alloys coatings was firstly elevated as the aging temperature elevated, then decreased, and the mass loss was opposite. The microhardness and mass loss was decreased by 4.3% and 11.9%, respectively, for the aging at 750 °C. The abrasion mechanism of non-aged high-entropy alloys coatings was the abrasive wear, and was the abrasive wear and adhesive wear after aging.

Tailoring Microstructures and Mechanical Properties of AlCoCrFeNiTi0.3 High-Entropy Alloys by Heat Treatment

2013 ◽  
Vol 745-746 ◽  
pp. 768-774 ◽  
Author(s):  
Jun Wei Qiao ◽  
Y.F. Wang ◽  
R.Q. Wang ◽  
J.Y. Shi ◽  
S.B. Sang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Volume Fraction ◽  
Treatment Temperature ◽  
High Entropy Alloys ◽  
Static Compression ◽  
High Entropy ◽  
Bcc Structure ◽  
Microstructures And Mechanical Properties ◽  
Quasi Static Compression

The microstructures and mechanical properties of AlCoCrFeNi0.3 high-entropy alloys (HEAs) are tailored through heat treatment. During heat treatment, the dendrite phase with a body-centered-cubic (bcc) structure transformed into the interdendrite phase with a bcc structure. Due to the element accumulation with higher hardness in the interdendrites and the increase of volume fraction of interdendrites, the average hardness of AlCoCrFeNi0.3 HEAs increased with the heat-treatment temperature, and the highest hardness was 625 HV. After 500 heat treatment, the optimized mechanical properties under quasi-static compression were achieved, and the yielding strength and fracture plasticity were 2.30 GPa and 9 %, respectively. Upon dynamic loading, the mechanical properties of HEAs were greatly enhanced.

Microstructure and Wear Resistance of AlFeCuCoNiCrTi1.5 High Entropy Alloy Coating on AZ91D Magnesium Alloys by Laser Cladding

2014 ◽  
Vol 644-650 ◽  
pp. 4766-4771
Author(s):  
Kai Jin Huang ◽  
Yu Yue Wang ◽  
Xin Lin
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Magnesium Alloys ◽  
Laser Cladding ◽  
Wear Test ◽  
Dry Sliding Wear ◽  
High Entropy Alloy ◽  
Solid Solution Phase ◽  
Wear Properties ◽  
High Entropy

To improve the wear properties of AZ91D magnesium alloys, a AlFeCuCoNiCrTi1.5high entropy alloy (HEA) coating was fabricated on AZ91D magnesium alloys by laser cladding using mixed powders of Al, Fe, Cu, Co, Ni, Cr, and Ti. The microstructure of the HEA coating was characterized by OM, SEM, and XRD. The wear resistance of the HEA coating was evaluated under dry sliding wear test condition at room temperature. The results show that the HEA coating mainly consists of a simple BCC solid solution phase. The HEA coating exhibits excellent wear resistance. The main wear mechanisms of the HEA coating and the AZ91D substrate were different, the former dominated by oxidative abrasive wear and the latter suffered from both adhesive and abrasive wear.

Microstructure and Wear Resistance of Cu0.9NiAlCoCrFe High Entropy Alloy Coating on AZ91D Magnesium Alloys by Laser Cladding

2014 ◽  
Vol 989-994 ◽  
pp. 246-250 ◽  
Author(s):  
Kai Jin Huang ◽  
Yu Yue Wang ◽  
Xin Lin
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Magnesium Alloys ◽  
Laser Cladding ◽  
Wear Test ◽  
Dry Sliding Wear ◽  
High Entropy Alloy ◽  
Solid Solution Phase ◽  
Wear Properties ◽  
High Entropy

To improve the wear properties of AZ91D magnesium alloys, a Cu0.9NiAlCoCrFe high entropy alloy (HEA) coating was fabricated on AZ91D magnesium alloys by laser cladding using prealloyed Cu0.9NiAlCoCrFe powders. The microstructure of the HEA coating was characterized by OM, SEM and XRD. The wear resistance of the HEA coating was evaluated under dry sliding wear test condition at room temperature. The results show that the HEA coating mainly consists of a simple BCC solid solution phase. The HEA coating exhibits excellent wear resistance. The main wear mechanisms of the HEA coating and the AZ91D substrate were different, the former dominated by oxidative abrasive wear and the latter suffered from both adhesive and abrasive wear.

scholarly journals Effect of Mo Element on the Mechanical Properties and Tribological Responses of CoCrFeNiMox High-Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 486
Author(s):  
Ying Liu ◽  
Yongxin Xie ◽  
Shaogang Cui ◽  
Yanliang Yi ◽  
Xuewei Xing ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Volume Fraction ◽  
Molar Ratio ◽  
High Entropy Alloys ◽  
Wear Properties ◽  
High Entropy ◽  
Chemical Content ◽  
Friction And Wear Properties ◽  
Mo Content

Certain amounts of precipitate in CoCrFeNiMox (simplified as Mox) is beneficial to the wear resistance; however, the optimal chemical content of Mo and the anti-wear mechanism behind it remains unclear. The Mox (x = 0, 0.3, 0.5, 1, 1.5 in molar ratio) high entropy alloys (HEAs) were manufactured, the evolution of their microstructure, mechanical, friction, and wear properties with Mo content was studied. The results displayed that the mechanical properties of the FCC solid solution were enhanced from Mo0 to Mo0.3, then kept unchanged till x = 1.5. The volume fraction of the precipitates increased with Mo content. The Mo1 presents the lower average friction coefficient and wear rate, attributed to the desired types, amount, size, distribution of the hard σ and μ phases in the ductile FCC solid solution. The detailed mechanism behind their tribological behaviors were discussed in the manuscript.

TGO and Al diffusion behavior of CuAlxNiCrFe high-entropy alloys fabricated by high-speed laser cladding for TBC bond coats

2021 ◽  
pp. 109781
Author(s):  
Qing-Long Xu ◽  
Kang-Cheng Liu ◽  
Ke-Yan Wang ◽  
Li-Yan Lou ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Laser Cladding ◽  
High Speed ◽  
High Entropy Alloys ◽  
Diffusion Behavior ◽  
High Entropy ◽  
Bond Coats

Thermal stability and oxidation resistance of FeCrxCoNiB high-entropy alloys coatings by laser cladding

2019 ◽  
Vol 359 ◽  
pp. 132-140 ◽  
Author(s):  
Fa Chang ◽  
Bingjie Cai ◽  
Chong Zhang ◽  
Biao Huang ◽  
Shuai Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Oxidation Resistance ◽  
Laser Cladding ◽  
High Entropy Alloys ◽  
High Entropy

Microstructure and Wear Properties of Laser Clad (Ti,Mo)C Multiple Carbide Reinforced Fe-Based Composite Coating

2010 ◽  
Vol 132 (4) ◽  
Author(s):  
Xinhong Wang ◽  
Min Zhang ◽  
Shiyao Qu
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Surface Coating ◽  
Pattern Analysis ◽  
Volume Fraction ◽  
Wear Properties ◽  
Selective Area ◽  
Laser Cladding Process ◽  
Carbide Size ◽  
Cubic Structure

(Ti,Mo)C multiple carbide reinforced Fe-based composite coating was produced by laser melting a precursor mixture graphite, ferrotitanium (Fe–Ti), and ferromolybdenum (Fe–Mo) powders. The results showed that flowerlike and cubic type (Ti,Mo)C multiple carbides were formed during laser cladding process. The selective area diffraction pattern analysis indicated that (Ti,Mo)C crystallizes with cubic structure, which indicates that (Ti,Mo)C carbides were multiple carbides with Mo dissolved in the TiC structure. The formation of (Ti,Mo)C particles was achieved via a nucleation-growth mechanism during the laser cladding process. Increasing the amount of Fe–Mo in the reactants led to a decrease of carbide size and an increase of volume fraction of carbides. The coating possessed good cracking resistance when the amount of Fe–Mo was controlled within a range of 15 wt %. The Fe-based surface coating reinforced by (Ti,Mo)C multiple carbides gave an excellent wear resistance.

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