Reinforcement mechanism and wear resistance of Al2O3/Fe-Cr-Mo steel composite coating produced by laser cladding

Duan, Xiaoxi; Gao, Shiyou; Dong, Qi; Zhou, Yefei; Xi, Mingzhe; Xian, Xipan; Wang, Bin

doi:10.1016/j.surfcoat.2016.02.045

Cited by 43 publications

(17 citation statements)

References 7 publications

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“…In addition, it can also be seen that the solidification structure changes from a dendritic structure ( Figure 5 a,b) to a flocculent structure ( Figure 5 c,d) in the composite coatings. This is attributed to the rapid heating and solidification during laser cladding [ 28 , 29 ]. In other words, the low scanning speed can make the molten pool remain molten over a longer time in higher temperature and remain, resulting in the formation of a dendritic structure.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate

Zhang

Bai

et al. 2018

Materials

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Ti/TiBCN composite coatings were prepared on a 7075 aluminum alloy surface by laser cladding. The relation between the main processing parameters (i.e., laser power, scanning speed, and powder feeding rate) and the geometrical characteristics (i.e., height, width, penetration depth, dilution and wetting angle) of single clad tracks is studied by linear regression analysis. The microstructure, micro-hardness and electrochemical corrosion were investigated by scanning electron microscopy, a Vickers micro-hardness machine, and a standard three-electrode cell, respectively. The results showed that all geometrical track characteristics are observed with high values of the correlation coefficient (R > 0.95). In addition, the average hardness value (750 HV0.2) was obtained of the Ti/TiBCN composite coating, and polarization curves indicated that the composite coatings were harder to corrode than the substrate.

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Section: Resultsmentioning

confidence: 99%

Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate

Zhang

Bai

et al. 2018

Materials

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“…Iron-aluminides are interesting for their possible high-temperature applications due to their oxidation resistance [25], stability in molten salts [26], relatively low density, electrical resistivity and low cost of raw materials [27,28,29]. Their wider use is partly hampered by their environmental embrittlement [30,31,32,33] but there is recently a renewed interest in these materials [25,34,35,36,37,38,39,40,41,42,43], including also Fe-Al-based nanocomposites [44,45,46,47,48,49,50,51,52,53,54,55,56,57]. A subset of these nanocomposites is constituted by so-called superalloys consisting of an ordered Fe3Al intermetallic compound with the D03 structure (see Figure 1) and a disordered solid solution of about 18.75 at.% Al in the Fe matrix, see, e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

An Ab Initio Study of Vacancies in Disordered Magnetic Systems: A Case Study of Fe-Rich Fe-Al Phases

et al. 2019

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We have performed quantum-mechanical calculations to examine the impact of disorder on thermodynamic, structural and electronic (magnetic) properties of Fe-Al systems with vacancies. A series of supercells was used and their properties were computed employing density-functional theory (DFT) as implemented in the VASP package. Our case study is primarily aimed at a disordered solid solution Fe 81.25 Al 18.75 but we have compared our results also with those obtained for the ordered Fe 3 Al intermetallic compound for which experimental data exist in literature. Both phases are found in Fe-Al-based superalloys. The Fe-18.75at.%Al solid solution was simulated using special quasirandom structures (SQS) in three different disordered states with a different distribution of Al atoms. In particular, we have considered a general disordered case (an A2-like variant), the case without the first nearest neighbor Al-Al pairs (a B2-like distribution of atoms) and also the case without both the first and second nearest neighbor Al-Al pairs (the D0 3 -like variant, in fact, an Fe-rich Fe 3 Al phase). The vacancy formation energies as well as the volumes of (fully relaxed) supercells with vacancies showed a large scatter for the disordered systems. The vacancy formation energies decrease with increasing concentration of Al atoms in the first coordination shell around the vacancy (an anti-correlation) for all disordered cases studied. The computed volumes of vacancies were found significantly lower (by 25–60%) when compared with the equilibrium volume of the missing atoms in their elemental states. Lastly, we have analyzed interactions between the vacancies and the Fe atoms and evaluated vacancy-induced changes in local magnetic moments of Fe atoms.

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“…Addition of oxide ceramic phase has become a trend to improve wear property of alloy coatings, especially, Al 2 O 3 with high hardness, wear resistance and thermal stability is the better choice of ceramic-reinforced phase (Duan et al, 2016). However, it easily produces cracks, pores and other defects in the preparation process due to its high viscosity, low toughness and fluidity (Ma et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of Al₂O₃ mass fraction on microstructure and friction–wear performance of laser cladded Fe90 alloy coating

Dejun

2021

ILT

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Purpose This paper aims to improve the friction reduction and wear resistance of Fe90 alloy coating by the addition of Al2O3. Design/methodology/approach Fe90 alloy coatings with the different Al2O3 mass fractions were prepared on Q235 steel by laser cladding (LC). The morphologies, phases and hardness of Fe90 alloy coating were analyzed using a scanning electron microscope (SEM), X-ray diffraction (XRD) and microhardness tester, respectively. The effects of Al2O3 mass fraction on the coefficient of friction (COF) and wear rates of Fe90 alloy coating were investigated using a friction tester, and the wear model was built to discuss the wear mechanism of Al2O3-reinforced Fe90 alloy coating. Findings The results show that the large number of Fe carbides is generated on the Fe90–Al2O3 coatings by the effect of laser high energy, and the hardness of Fe90–coating is 806 HV0.5, which is 4.48 times of substrate. The average COFs of Fe90–Al2O3 alloy coatings decrease from 0.73 to 0.55, and the wear rates are also reduced from 447.78 to 274.63 µm3•s–1•N–1 by the addition of Al2O3. The Fe90–6% Al2O3 coating presents the highest wear resistance among the three kinds of coatings, and the wear mechanism is abrasive wear and micro-cutting wear. Originality/value The Al2O3-reinforced Fe90 alloy coating was first fabricated by laser cladding, and the effect of Al2O3 on the friction-wear performance of Fe90 alloy coating was investigated.

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Reinforcement mechanism and wear resistance of Al2O3/Fe-Cr-Mo steel composite coating produced by laser cladding

Cited by 43 publications

References 7 publications

Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate

Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate

An Ab Initio Study of Vacancies in Disordered Magnetic Systems: A Case Study of Fe-Rich Fe-Al Phases

Effects of Al₂O₃ mass fraction on microstructure and friction–wear performance of laser cladded Fe90 alloy coating

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Reinforcement mechanism and wear resistance of Al2O3/Fe-Cr-Mo steel composite coating produced by laser cladding

Cited by 43 publications

References 7 publications

Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate

Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate

An Ab Initio Study of Vacancies in Disordered Magnetic Systems: A Case Study of Fe-Rich Fe-Al Phases

Effects of Al2O3 mass fraction on microstructure and friction–wear performance of laser cladded Fe90 alloy coating

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Effects of Al₂O₃ mass fraction on microstructure and friction–wear performance of laser cladded Fe90 alloy coating