Ruizhen Guo

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The Evolution of the Tensile Properties of MoS2-Coated Titanium Alloy Bolts Under the Synergistic Damage of NaCl Corrosion and Preloading

Materials (2024)

Feng Derong M.S. Xie Weilin Yu Chao Li Ruizhen Guo

MoS2 coating is a newly developed method to prevent bolt corrosion and the seizure of bolts used in equipment in sea areas. It is of great significance to investigate the evolution of the tensile properties and intact coatings for the maintenance of coated bolts. To evaluate the tensile properties of MoS2-coated titanium alloy bolts, titanium alloy bolts coated with MoS2 (TC4+MoS2) and bolts treated with a composite treatment of anodizing oxidation and MoS2 coating (TC4+AO+MoS2) were corroded in salt spray tests for 4300 h. The MoS2 coating significantly enhanced the bolts’ corrosion resistance, demonstrating exceptional protective performance by only experiencing minor peeling due to oxidation-induced cracking of the coating during the extensive 4300 h salt spray test. The tensile strengths of the TC4+MoS2 and TC4+AO+MoS2 bolts both decreased as compared with the original bolts. The bolts pretreated with anodic oxidation revealed lighter coating peeling and maintained a higher tensile strength after corrosion. Therefore, it can be concluded that the coatings provided excellent corrosion resistance, leading to a minor impact on the bolts’ tensile strength and fracture behavior under the synergistic damage of sea water corrosion and preloading.

Anodizing

Salt spray test

Titanium alloy

Tensile testing

10.3390/ma18010123

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Citations (0)

Dramatically Improved Strength and Plasticity of Pure Magnesium Through Multi-Microalloying with Al, Ca, Mn, Zn, and Sn Elements

JOM (2022)

Xiong Zhou Qichi Le Dandan Li Chenglu Hu Tong Wang

Elongation

Brittleness

10.1007/s11837-022-05447-1

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Citations (4)

Study on the low mechanical anisotropy of extruded Mg-Zn-Mn-Ce-Ca alloy tube in the compression process

Journal of Magnesium and Alloys (2022)

Dandan Li Qichi Le Xiong Zhou Xiaoqiang Li Chenglu Hu

In this study, the extruded Mg-Zn-Mn-Ce-Ca alloy tube with a low compression anisotropy along the ED, 45ED and TD was prepared. The effect of the second phases, initial texture and deformation behavior on this low mechanical anisotropy was investigated. The results revealed that the alloy tube contains the high content (Mg1-xZnx)11Ce phase and the low content of Mg12Ce phase. These second phases are respectively incoherent and coherent with the Mg matrix, and their influence can be ignored. Additionally, the alloy tube exhibited a weak basal fiber texture, where the c-axis was aligned along the 0° ∼ 30° tilt from TD to ED. Such a texture made the initial deformation (at 1.0% ∼ 1.6% strain) of the three samples controlled by comparable basal 〈a〉 slip. As deformation progressed (1.6∼9.0% strain), larger amounts of ETWs nucleated and gradually approached saturation in the three samples, re-orienting the c-axis to a 0°∼±30° deviation with respect to the loading directions. Meanwhile, the prismatic 〈a〉 and pyramidal slips replaced the dominant deformation progressively until fracture. Eventually, the similar deformation mechanisms determined by the weak initial texture in the three samples contribute to the comparable strain hardening rates, resulting in the low compressive anisotropy of the alloy tube.

Strain hardening exponent

Texture (cosmology)

Hardening (computing)

Deformation mechanism

10.1016/j.jma.2022.07.001

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Citations (15)

Simulation research on the rotating back extrusion process for magnesium alloy wheel

International Journal of Material Forming (2023)

Yanchao Jiang Qichi Le Qiyu Liao Chenglu Hu Ruizhen Guo

Dynamic Recrystallization

10.1007/s12289-023-01793-w

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Citations (6)

Effect of welding current on the microstructures and mechanical properties of GTAW joints for ZLa22 alloy

Welding in the World (2021)

Weiyang Zhou Qichi Le Ruizhen Guo Liang Ren Liang Chen

10.1007/s40194-021-01184-2

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Citations (6)

The influence of initial texture, microstructure and deformation behavior on the low mechanical anisotropy of extruded Mg alloy tube

Journal of Materials Research and Technology (2022)

Dandan Li Qichi Le Chenglu Hu Xiaoqiang Li Xiong Zhou

In this study, the extruded Mg–Zn–Mn–Ce–Ca alloy tube with a weak basal fiber texture, i.e. the {0001} plane is distributed along the TD with 0°∼30° deflection towards ED, was fabricated. The alloy tube exhibits a low mechanical anisotropy in the tensile process at room temperature. To clarify the relationship between the weak texture and the low mechanical anisotropy, the microstructure and deformation mechanism of the alloy tube in the tensile process along the ED, 45ED and TD were studied. The results revealed that during yielding, the deformation in ED sample was governed by predominant prismatic slip, and a portion of additional basal slip and lowest pyramidal slip, while predominant basal slip and accompanied by a high fraction of prismatic slip and lowest pyramidal slip for both 45ED and TD samples. These relatively high additional slips result from the weak texture, which attenuates the deformation differences among the three samples. After yielding, the three samples underwent similar prismatic slip transition and twin nucleation quantity. Additionally, the {0001} plane displayed to converge towards the RD after tensile fracture, which may be related to the twins and intragranular slip. Especially for 45ED and TD samples, relatively high basal slip may cause their {0001} plane to tend to be parallel to the loading direction. In summary, the similar deformation mechanisms governed by weak texture along the three directions resulted in the low mechanical anisotropic of the alloy tube.

Deformation mechanism

10.1016/j.jmrt.2022.08.053

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Citations (9)

Interfacial diffusion between SiC and Mg alloys

Materials Today Communications (2025)

Ruizhen Guo Qichi Le Shutang Gao Yingbin Lin Tong Wang

10.1016/j.mtcomm.2025.111649

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Citations (0)

The relationship between the thermoelectric power and resultant solidification microstructures of Al-Si melt under electromagnetic field

Materials Chemistry and Physics (2019)