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15 Result(s)

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  1. No Access

    Article

    Effect of Laser Hardening and Gas Nitriding on Wear Resistance of Steel P20: A Comparative Study

    The effect of laser hardening and of gas nitriding on the microstructure and wear resistance of steel P20 (the Russian counterpart is 38KhNM) is studied. The phase composition and the microhardness of the hard...

    Guanghua Yan, Xudong Yang, Jianfeng Gu, Chuanwei Li in Metal Science and Heat Treatment (2023)

  2. No Access

    Article

    Effect of Initial Microstructure on Mechanical Properties of Pressure Vessel Steel after Intercritical Heat Treatment

    The influence of the initial structure on formation of austenite, evolution of structure, and elevation of operating characteristics of steel SA508 Gr.3 (0.24% C, 1.40% Mn, 0.88% Ni, 0.54% Mo) after an intercr...

    Guanghua Yan, Yanle Sun, Jianfeng Gu, Chuanwei Li in Metal Science and Heat Treatment (2021)

  3. No Access

    Article

    Analysis of Martensitic Transformation Plasticity Under Various Loadings in a Low-Carbon Steel: An Elastoplastic Phase Field Study

    An elastoplastic phase field model for the martensitic transformation of a Fe-0.22C-1.58Mn-0.81Si (wt pct) alloy was developed, to investigate transformation plasticity in response to uniaxial, biaxial, shear ...

    **ng Zhang, Gang Shen, Jun Xu, Jianfeng Gu in Metallurgical and Materials Transactions A (2020)

  4. No Access

    Article

    Effect of Cyclic Intercritical Tempering on the Microstructure and Mechanical Properties of a Low-Carbon Cu-Bearing 7Ni Steel

    High strength and toughness are usually hard to obtain simultaneously because of the trade-off. In this research, cyclic intercritical tempering (IT) was applied to a low-carbon Cu-bearing 7Ni steel to pursue ...

    Wei Hou, Qingdong Liu, Haiming Wen… in Metallurgical and Materials Transactions A (2020)

  5. No Access

    Article

    Microstructure Formation and Tailoring of the Intermetallic TiAl Alloy Produced by Direct Laser Deposition

    This study investigates the microstructure morphology in a single-track wall of Ti-47Al-2Cr-2Nb alloy produced by direct laser deposition. The as-deposited wall mainly exhibited an alternative-band microstruct...

    **nyu Zhang, Chuanwei Li, Haozhang Zhong… in Metallurgical and Materials Transactions A (2020)

  6. No Access

    Article

    A Novel Method to Calculate the Carbides Fraction from Dilatometric Measurements During Cooling in Hot-Work Tool Steel

    Dilatometry is a useful technique to obtain experimental data concerning transformation. In this paper, a dilation conversional model was established to calculate carbides fraction in AISI H13 hot-work tool st...

    **aoli Zhao, Chuanwei Li, Lizhan Han, Jianfeng Gu in Metals and Materials International (2018)

  7. No Access

    Article

    Compositional Variants of Cu-rich Precipitate in Thermally Aged Ferritic Steel

    Atom probe tomography was utilized to investigate Cu precipitation in a high-strength low-alloy steel isothermally aged at 500 °C for 1, 4, 16, and 64 h after water-quenching from 900 °C. With prolonged aging ...

    Qingdong Liu, Yihua Chen, Chuanwei Li… in Acta Metallurgica Sinica (English Letters) (2018)

  8. Article

    Open Access

    Bainite Transformation Characteristics of High-Si Hypereutectoid Bearing Steel

    In this work, the bainite transformation characteristics of a high-Si hypereutectoid (1.3 wt.% Si, 1 wt.% C) bearing steel was analyzed by means of microstructural observation and dilatometric experiment. The ...

    Zhihui Chen, Jianfeng Gu, Lizhan Han in Metallography, Microstructure, and Analysis (2018)

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  9. No Access

    Article

    Effect of Macrosegregation on the Microstructure and Mechanical Properties of a Pressure-Vessel Steel

    Macrosegregation refers to the chemical segregation, which occurs quite commonly in the large forgings such as nuclear reactor pressure vessel. This work assesses the effect of macrosegregation and homogenizat...

    Guanghua Yan, Lizhan Han, Chuanwei Li… in Metallurgical and Materials Transactions A (2017)

  10. No Access

    Chapter

    Microstructure Evolution of a Reactor Pressure Vessel Steel During High-Temperature Tempering

    The electron microscopy techniques were employed to analyze the microstructure evolution during high-temperature tempering of a reactor pressure vessel steel. The results show that carbon enriched martensite/a...

    Chuanwei Li, Jianfeng Gu, Lizhan Han, Qingdong Liu in Energy Materials 2017 (2017)

  11. No Access

    Article

    Microstructural Evolution and Carbide Precipitation in a Heat-Treated H13 Hot Work Mold Steel

    The microstructure and carbide precipitation for a H13 hot work mold steel after heat treatment and stabilization treatment at 620 °C for up to 20 h were investigated by optical microscopy, electron backscatte...

    Mu Lin, **ngfeng Zhao, Lizhan Han… in Metallography, Microstructure, and Analysis (2016)

  12. No Access

    Article

    Effect of Multistage Heat Treatment on Microstructure and Mechanical Properties of High-Strength Low-Alloy Steel

    The influence of Cu-rich precipitates (CRPs) and reverted austenite (RA) on the strength and impact toughness of a Cu-containing 3.5 wt pct Ni high-strength low-alloy (HSLA) steel after various heat treatments...

    Qingdong Liu, Haiming Wen, Han Zhang… in Metallurgical and Materials Transactions A (2016)

  13. No Access

    Article

    Effect of interstitial solutes on precipitation behavior of 9–12% chromium ferritic steels

    Effects of nitrogen and carbon content on precipitation behavior in two 9–12% Cr ferritic heat-resistant steels during isothermal transformation were investigated. Isothermal aging treatments at 700 °C after s...

    **ngang Tao, Chuanwei Li, Lizhan Han, Jianfeng Gu in Metals and Materials International (2015)

  14. No Access

    Article

    On the Role of Ni in Cu Precipitation in Multicomponent Steels

    The nature of Cu precipitation in quench-tempered multicomponent high-strength low-alloy steels is characterized by atom probe tomography. The detected nanometer sized Ni-rich clusters act as preferential nucl...

    Qingdong Liu, Jianfeng Gu, Wenqing Liu in Metallurgical and Materials Transactions A (2013)

  15. No Access

    Article

    LnPO4: RE3+ (La = La, Gd; RE = Eu, Tb) nanocrystals: solvo-thermal synthesis, microstructure and photoluminescence

    Through altering the solvents, we have obtained the Eu3+/Tb3+ ions-doped LnPO4 (Ln = La, Gd) phosphors with different particle sizes, microstructures and morphologies via a facile solvo-thermal technology. X-ray ...

    Bing Yan, Jianfeng Gu, **uzhen **ao in Journal of Nanoparticle Research (2010)