Yongqing Zhao

Northwest Institute For Non-Ferrous Metal Research

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Weidong Zeng

Northwestern Polytechnical University

Qinyang Zhao

Chang'an University

Shewei Xin

Northwest Institute For Non-Ferrous Metal Research

Yongnan Chen

Chang'an University

Wei Zhou

Changsha University

Yusheng Zhang

China Railway Group (China)

Jinwen Lu

Jiangsu University of Science and Technology

Zeng Weidong

Northwestern Polytechnical University

Hu‐Lin Li

Jiangnan University

Yuanfei Han

Shanghai Jiao Tong University

Cooperative Institutions

Chinese Academy of Sciences

136

Northwest Institute For Non-Ferrous Metal Research

125

Lanzhou University

104

Northwestern Polytechnical University

Chang'an University

State Key Laboratory of Applied Organic Chemistry

Xi'an Jiaotong University

Northeastern University

Central South University

University of Chinese Academy of Sciences

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Microstructural morphology effects on fracture toughness and crack growth behaviors in a high strength titanium alloy

Materials Science and Engineering A (2021)

Huan Wang Qinyang Zhao Shewei Xin Yongqing Zhao Wei Zhou

Transgranular fracture

Ductility (Earth science)

Fractography

10.1016/j.msea.2021.141626

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Citations (57)

Improving mechanical properties and achieving structural stability of large-size molybdenum single crystal during hot deformation by adding Nb element

Journal of Alloys and Compounds (2023)

Benqi Jiao Qinyang Zhao Yongqing Zhao Weiwei Zhang Wen Zhang

Recrystallization (geology)

Dynamic Recrystallization

10.1016/j.jallcom.2023.169369

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Citations (8)

Current Situation and Development Trend of Titanium Alloys

Zhongguo cailiao jinzhan (2010)

Yongqing Zhao

Because of their excellent properties,great attention has been paid to Ti and Ti alloys.This paper reviews their current situation and development trend in recent ten years,and also gives the differences between China and other countries.The suggestions for development of Ti alloys are also put forward.

Titanium alloy

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Citations (7)

The Research of Protection Strategy for 110 kV Cold Dielectric High Temperature Superconducting Power Cable

IEEE Transactions on Applied Superconductivity (2012)

Jingzhou Hou Bin Wei Panpan Chen Yongqing Zhao Chao Gao

The protective relay is of important significance to ensure the high-temperature superconducting (HTS) cable in safe and reliable operation, which is also the key technology problem that needs to be solved in the process of HTS cable's application. In this paper, the 110 kV cold dielectric (CD) HTS cable is chosen as the research object. First, according to the 110 kV CD HTS cable's technical characteristics and application in power grids, the fault of operation is discussed. Based on the above, the paper presents a protection strategy for the 110 kV CD HTS cable, which combines the advantage of the electric and nonelectric parameters in the detection and could be easily put into use in the projects. Finally, the whole protection strategy is presented. The protection strategy proposed in this paper provides a feasible idea for the protection of HTS cables, which is of positive significance on the promotion of the superconducting cable.

Power cable

10.1109/tasc.2012.2233255

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Citations (3)

Tensile and Creep Properties of Ti-600 Alloy

Transactions of Nonferrous Metals Society of China (2007)

Zeng Liying Quan Hong Guan‐Jun Yang Yongqing Zhao Yunlian Qi

Ti-600 is one of the high performance titanium alloys used at 600℃, which was developed in Northwest Institute for Nonferrous Metal Research (NIN) in China. The tensile and creep properties of Ti-600 alloy with different thermal treatment conditions were investigated. The results indicate that Ti-600 alloy possesses favorite comprehensive properties solution-treated at 1020℃ for 1h, then air-cool, and aged at 650℃ for 8h, finally air-cooling, especially possesses quite good creep resistance. The residual deformation is less than 0.1% for the alloy exposed at 600℃ for 100h with the stress of 150MPa, and the bimodal microstructures of the alloy are almost the same as that of the alloy treated by duplex thermal treatment, only needle primary a phases became relatively thicker and coarsened. The ultimate strength and the elongation of the alloy tested at ambient temperature are 1080MPa and 12%, respectively; while at 600℃, they are 690MPa and 16%, respectively. The ductility of the alloy tested at room temperature is no less than 5% after thermal exposing at 600℃ for 100h.

Elongation

Ductility (Earth science)

Titanium alloy

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Citations (3)

Phase Transformation in a β-Ti Alloy with Good Balance Between High Strength and High Fracture Toughness

Chinese Journal of Aeronautics (2009)

Yang Li Qiang Wei Ma Chaoli Lijing Zheng Huanxi Li

This article studies the phase transformation of the metastable β-Ti-Al-Mo-V-Cr-Zr alloy (Ti-1300) to disclose the morphological reason for its high strength and high fracture toughness. It has been found that its ultrahigh strength (ultimate tensile strength exceeds 1 400 MPa) owes mainly to the spheroidization of the α-phase, while the high fracture toughness (exceeds 81 MPa·m½) to the special lath-shaped α-particles. Compared to the needle-shaped second α-articles, the coarser lath-shaped ones remove the stress concentration at the lath tips and consequently benefit improvement of fracture toughness. The article also describes shape evolution of the α-particles during aging thermodynamically and kinetically, and suggests an optimized aging processing to achieve an ideal balance between high strength and high toughness for this alloy.

Lath

Structural material

10.1016/s1000-9361(08)60137-5

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Citations (8)

Comparison on Impact Toughness of High-Strength Metastable β Titanium Alloy with Bimodal and Lamellar Microstructures

Metals (2022)

Jing Wang Yongqing Zhao Qinyang Zhao Chao Lei Wei Zhou

The impact toughness of a high-strength metastable β titanium alloy (Ti-5Cr-4Al-4Zr-3Mo-2W-0.8Fe) with two typical microstructures is studied by Charpy impact tests. The bimodal microstructure (BM) and the lamellar microstructure (LM) are obtained by the solution and aging treatments and the β annealing, slow cooling and aging treatments, respectively. In the impact crack initiation process, the deformation capacities of the primary α (αp) phase, secondary α (αs) phase and transformed β (βt) matrix in the BM are very different, and the stress gradient at the interface of the three causes the crack initiation. The lamellar α (αl) phase and βt in the LM satisfy the BOR relationship, and the effective slip transfer between α and β phases slows down the crack initiation. Meanwhile, the appearance of deformation twins in the LM improves the crack initiation energy. In the crack propagation process, the lack of coordinated deformation between the α and β phases in the BM leads to rapid crack propagation. In the LM, the deformation of αl and βt is relatively more coordinated, so the severe plastic deformation is only concentrated near the crack and at the interface. The secondary crack initiation and the crack propagation along the twin boundary reduce the stress concentration at the crack tip. The deformation twins and zigzag propagation path can improve the crack propagation energy. To summarize, the alloy with LM exhibits better impact toughness than the alloy with BM.

Charpy impact test

Titanium alloy

10.3390/met12020271

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Citations (9)

Simultaneously enhancing the strength and ductility in titanium matrix composites via discontinuous network structure

Composites Part A Applied Science and Manufacturing (2020)

Jinwen Lu Longlong Dong Yue Liu Yongqing Fu Wei Zhang

Ductility (Earth science)

STRIPS

Particle (ecology)

10.1016/j.compositesa.2020.105971