Novel gradient alloy steel with quasi-continuous ratios fabricated by SLM: Material microstructure and wear mechanism

Wang, X.; Zhang, C.H.; Cui, X.; Zhang, S.; Chen, J.; Zhang, J.B.

doi:10.1016/j.matchar.2021.111020

Cited by 39 publications

(9 citation statements)

References 51 publications

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“…The simulation results demonstrated that the largest thermal gradient direction was along the normal direction of the molten pool, which provided a sufficient driving force for the growth of columnar crystals. 45 Furthermore, the high thermal conductivity of the Ag–Cu alloy of the deposited layers also intensified the heat accumulation along the building direction. The preferred crystal orientation and the largest thermal gradient all along the same direction keep the grains from persistently growing in a single direction for a typical columnar morphology.…”

Section: Resultsmentioning

confidence: 99%

Microstructure, grain and nanowire growth during selective laser melting of Ag–Cu/diamond composites

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Microstructure, grain and nanowire growth during selective laser melting of Ag–Cu/diamond composites

et al. 2023

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“…SF represents the plastic deformation ability of the crystal; the smaller the SF value, the more difficult it is for plastic deformation to occur. [ 26,27 ] Therefore, the smaller the SF value, the higher is the yield stress of the crystal. [ 28 ] Internal stress is an elastic force; when the internal stress exceeds the yield stress of the crystal, the crystal will deform plastically and release the internal stress.…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigation on the Inhomogeneities of Transverse Microstructure and Internal Stress of High‐Strength Low‐Alloy Hot‐Rolled Strip

Fei

Wang

Yang

et al. 2022

steel research int.

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Herein, the evolution of transformation in the width direction of high‐strength low‐alloy hot‐rolled strip is studied by using thermomechanical simulation, and the temperature, microstructure, and internal stress are correlated based on electron backscatter diffraction data. The temperature and time range of the transverse transformation are determined based on the thermal expansion curve. The results show that the transformation at the edge of the steel plate ends earliest and that at the plate center begins at the latest; only 31.9% austenite undergoes transformation at the plate central by the end of laminar cooling. The fraction of transformed austenite at the plate center is the least throughout the laminar cooling process. The proportion of small grains (within the grain size range of 0–4 μm), mean, and variant coefficient of grain sizes at the plate edge are 75%, 4 μm, and 1.29, respectively. In contrast, those values of the central region are 66%, 4.4 μm, and 1.05, respectively. The correlation between temperature and internal stress evolutions is established. It is demonstrated that the internal stress increases monotonically with the average transformation rate.

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“…[ 42 ] In explaining the wear mechanism of gradient alloy steel, Wang et al also stated that the lower the value of the Schmid factor, the lower the corresponding wear rate and friction coefficient. [ 43 ] It is feasible to calculate the Schmid factor to analyze the deformation behaviors of materials in wear.…”

Section: Discussionmentioning

confidence: 99%

Improvement of Mechanical Properties and Wear Resistance of Direct‐Quenched Wear‐Resistant Steel by Deformed Austenite

Jia

Deng

Wang

et al. 2023

steel research int.

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Herein, thermomechanically controlled processing (TMCP) and direct‐quenching (DQ) process are investigated to improve the mechanical and wear properties of wear‐resistant steel, compared to the reheating–quenching (RQ) process. Scanning electron microscope, electron backscatter diffraction, transmission electron microscope, and X‐ray diffraction are employed to characterize the microstructures of the DQ and RQ specimens, and the mechanical and wear properties are investigated using the Vickers hardness, impact, tensile, and stirring wear tests for both processes. The results show that DQ steel exhibits strong plasticity, impact toughness, and wear resistance; the DQ process also retains the deformed austenite formed by rolling in the nonrecrystallization region. The compressed austenite reduces the size of the martensite lath and block structure, increases the density and proportion of the high‐angle grain boundaries, and improves the plasticity and toughness of DQ steel. Meanwhile, DQ steel also inherits the high‐density dislocations created during the rolling process, which is its primary strengthening mechanism. The deformed grains in DQ steel reduce the Schmid factor, improve resistance to wear deformation, and enhance its wear performance.

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Novel gradient alloy steel with quasi-continuous ratios fabricated by SLM: Material microstructure and wear mechanism

Cited by 39 publications

References 51 publications

Microstructure, grain and nanowire growth during selective laser melting of Ag–Cu/diamond composites

Microstructure, grain and nanowire growth during selective laser melting of Ag–Cu/diamond composites

Experimental Investigation on the Inhomogeneities of Transverse Microstructure and Internal Stress of High‐Strength Low‐Alloy Hot‐Rolled Strip

Improvement of Mechanical Properties and Wear Resistance of Direct‐Quenched Wear‐Resistant Steel by Deformed Austenite

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