Tuning the microstructure, mechanical properties, and tribological behavior of in-situ VCp-reinforced Fe―matrix composites via manganese-partitioning treatment

Chen, Pinghu; Zhang, Yun; Zhang, Zhenyuan; Li, Ruiqing; Zeng, Songsheng

doi:10.1016/j.mtcomm.2020.101135

Cited by 4 publications

(5 citation statements)

References 30 publications

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“…Li reported that retained austenite was more stabilized when Mn and C elements dissolved into an austenite structure [ 28 ]. Therefore, an Mn-partitioning treatment made retained austenite more stable because it suppresses rapid diffusion of alloying elements in the post heat treatment [ 22 ]. However, unfortunately, some brittle precipitates were formed and resulted in weakening mechanical properties and wear resistance.…”

Section: Discussionmentioning

confidence: 99%

“…Firstly, the digital micro Vickers hardness tester (Micro Vickers HV-1000Z, MEGA INSTRUMENTS, Shanghai, China) was employed to measure the microhardness of samples with different heat treatments under a load of 1000 gf with a loading duration time of 15 s; each hardness value was obtained by on average at least five points, resulting in reaching the final value. Secondly, tensile strength was measured using universal testing machines (PWS-E100, Shenggong, Jinan, China) the detailed sizes of the samples and testing parameters have been reported in our previous work [ 22 ]. Thirdly, the friction and wear tests were carried out using a ball-on-disk machine (MFT-5000, Rtec Instrument, San Jose, CA, USA) with a φ 4 mm tungsten carbide ceramic ball as the counterpart under different wear loads of 5, 10, 20 N and different wear times of 1, 3, 5 h; meanwhile, the turning speed and radius were set to 200 r/min and 5 mm, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous works, a novel in situ VCp reinforced iron-based composite (VCFC) was designed based on the transformation-induced plasticity (TRIP) effect. Simultaneously, the corresponding heat treatment was performed to obtain the retained austenite (FCC) of metastable structure, which was then transformated from an FCC structure of good toughness to a BCC structure of high hardness under a certain load [ 20 , 21 , 22 ]. Previous results indicate that Mn-partition and C-partition can stabilize the retained austenite at room temperature accompanied with excellent wear resistance.…”

Section: Introductionmentioning

confidence: 99%

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The Correlation Analysis of Microstructure and Tribological Characteristics of In Situ VCp Reinforced Iron-Based Composite

et al. 2021

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In this study, four kinds of heat treatments were performed to obtain a certain amount of retained austenite, which can result in good toughness and low brittleness accompanied with wear resistance of an in situ VC particle reinforced iron-based composite (VCFC). Microstructure, mechanical properties and wear resistance of the samples under heat treatment of QP, QPT, MQP and MQPT were compared. The experimental results indicated that there is a huge difference in microstructure between MQPT and the other heat treatments. High-proportion retained austenite and white net-like precipitates of M7C3 carbide existed in the MQPT-treated sample, but thick M7C3 carbide with brittleness was discovered in the other sample. Thereby, high-proportion retained austenite contributed to its low hardness of 634 HV and high tensile strength of 267 MPa, while a maximum hardness of 705.5 HV and a minimum tensile strength of 205 MPa were exhibited in the QPT-treated sample with a V-rich carbide of high hardness, a Cr-rich carbide of brittleness and a high-proportion martensite. Meanwhile, a phase transformation from retained austenite to martensite could increase the hardness and enhance wear resistance based on the transformation-induced plasticity (TRIP) effect; its wear rate was only 1.83 × 10−6 mm−3/(N·m). However, the wear rates of the samples under QP, QPT and MQP heat treatments increased by 16.4%, 44.3% and 41.0%, respectively. The wear mechanism was a synergistic effect of the adhesive wear mechanism and the abrasive wear mechanism. The adhesive wear mechanism was mainly considered in the MQPT-treated sample to reduce the wear rate attributed to high-proportion retained austenite and the existence of wear debris with a W element on the surface of the wear track. However, the abrasive wear mechanism could exist in the other samples because of a lot of thick, brittle M7C3, thereby resulting in a higher wear rate due to immediate contact between the designed material and the counterpart.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Correlation Analysis of Microstructure and Tribological Characteristics of In Situ VCp Reinforced Iron-Based Composite

et al. 2021

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“…It also provide the appropriate condition for the fast and precise motions with minimum required maintenance cost and increment of the efficiency [94][95][96][97][98][99][100]. Having said that, tribology has rendered several valuable applications such as gas turbine engines, automotive parts, artificial human joints, hard disk drives for data storage and an increasing number of electromechanical devices [101][102][103][104].…”

Section: Tribology Theorymentioning

confidence: 99%

Recent Progress in the Study of Thermal Properties and Tribological Behaviors of Hexagonal Boron Nitride-Reinforced Composites

et al. 2020

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Ever-increasing significance of composite materials with high thermal conductivity, low thermal expansion coefficient and high optical bandgap over the last decade, have proved their indispensable roles in a wide range of applications. Hexagonal boron nitride (h-BN), a layered material having a high thermal conductivity along the planes and the band gap of 5.9 eV, has always been a promising candidate to provide superior heat transfer with minimal phonon scattering through the system. Hence, extensive researches have been devoted to improving the thermal conductivity of different matrices by using h-BN fillers. Apart from that, lubrication property of h-BN has also been extensively researched, demonstrating the effectivity of this layered structure in reduction of friction coefficient, increasing wear resistance and cost-effectivity of the process. Herein, an in-depth discussion of thermal and tribological properties of the reinforced composite by h-BN will be provided, focusing on the recent progress and future trends.

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“…A novel particle-reinforced, Fe-based, wear-resistant composite with in situ VC was designed. Multistage heat treatments were employed to adjust the microstructure, mechanical properties, and wear resistance [20][21][22]. Excellent wear resistance could be attributed to the uniform dispersion of in situ VC with a high proportion, and good mechanical properties were caused by a certain amount of retained austenite.…”

Section: Introductionmentioning

confidence: 99%

Investigating Microstructural Evolution and Its Influence on Tribological Behaviors of In-Situ Formed VCp Reinforced Iron-Based Composites with Variable Mn Content

et al. 2022

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In this work, we fabricated VCp-reinforced iron-based composites (VCFCs) by adjusting the amount of Mn elements and investigated how the concentration of Mn affected the microstructural characteristics of Vanadium carbide (VC) and the texture of the iron matrix, and the influence of microstructure on tribological behaviors should be investigated. We demonstrated that VC changed from thick dendrite crystals (~50 μm) to tiny equiaxed crystals (~5 μm). Furthermore, the nucleation mechanism of VC also transformed from homogeneous nucleation to heterogeneous nucleation due to the lower Gibbs free energy of TiC and the tailoring effect of the Mn elements. In addition, γ-Fe in the FCC structure gradually increased and ascribed an increase of Mn content to the lower transformation temperature of martensite. Furtherly, particulate features and phase constitution could contribute to hardness and wear resistance. Higher hardness and excellent wear resistance occurred in the 3.0 Mn sample, which had a hardness of 869 HV and a wear rate of 1.77 × 10−6 mm3/(N·m). In addition, the adhesive wear could be the main wear mechanism in the 3.0 Mn sample, while the abrasive wear could be in the 4.5 Mn sample.

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Tuning the microstructure, mechanical properties, and tribological behavior of in-situ VCp-reinforced Fe―matrix composites via manganese-partitioning treatment

Cited by 4 publications

References 30 publications

The Correlation Analysis of Microstructure and Tribological Characteristics of In Situ VCp Reinforced Iron-Based Composite

The Correlation Analysis of Microstructure and Tribological Characteristics of In Situ VCp Reinforced Iron-Based Composite

Recent Progress in the Study of Thermal Properties and Tribological Behaviors of Hexagonal Boron Nitride-Reinforced Composites

Investigating Microstructural Evolution and Its Influence on Tribological Behaviors of In-Situ Formed VCp Reinforced Iron-Based Composites with Variable Mn Content

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