Weizhong Feng

Deformation Behavior and Constitutive Model Modification with Friction Correction of TC4 Titanium Alloy During Hot Compression

Zhixin Han, Wei Luo, 林高用, J Y Tang et autres

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Multi-objective optimization design and verification of extrusion die structure for TC4 titanium alloy Y-section profile

Changyuan Jia, Yang Qi, Chunhui Dai, Weizhong Feng et autres

This study focuses on the multi-objective optimization design of high-temperature extrusion die structures for TC4 titanium alloy Y-shaped profiles used in the aerospace field. A high-precision Hansel-Spittel constitutive model of TC4 titanium alloy was established to provide a basis for numerical simulation …

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Effect of vibratory polishing time on EBSD identification rate of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si powder samples

Ke Zhang, Shaoqing He, Weizhong Feng, Shaoyang Wang

Abstract EBSD sample preparation of titanium alloys requires no surface stress. In this study, the differences in identification rates of samples after vibration polishing, argon ion polishing and chemical etching at different times were compared. The effect of different vibratory polishing times …

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Hot deformation characteristics and dynamic recrystallization of Ti−6Al−4V−0.5Mo−0.5Zr alloy used for petroleum drill pipe

Ziyou Zhou, Gaoyong Lin, Yu-hao AI, Weizhong Feng et autres

The high-temperature compression deformation behavior of Ti−6Al−4V−0.5Mo−0.5Zr alloy was investigated at temperatures from 890 to 1030 °C and strain rates from 0.01 to 10 s −1 , and the corresponding dynamic recrystallization (DRX) mechanism was revealed. The results indicate that under different …

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Effect of Ni and Nb Elements on Corrosion Resistance and Behavior of TC4 Alloy in Hydrochloric Acid

Kaikai Xiao, Jinpeng Ge, Yongqiang Zhang, Jian Wang et autres

Due to the development of the petroleum industry, more severe mining conditions put forward higher corrosion resistance requirements for materials. In this paper, the corrosion resistance and corrosion behavior of four TC4-xNi-yNb (x, y = 0, 0.5) alloys were investigated in a …

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Resistance of fatigue crack propagation induced by large α colony in a Ti‐Al‐V‐Mo‐Zr alloy

Yikui Liu, Shuxian Peng, Bin Wang, Wei Luo et autres

Abstract For Ti alloys used in oil drilling pipe, the fatigue crack propagation (FCP) resistance is one of the key properties for petroleum industrial applications. In this work, the fatigue crack propagation behaviors of bimodal, equiaxed, lamellar, and Widmanstatten microstructures have been …

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Synergistically achieving high strength and impact toughness in Ti–6Al–4V-0.5Mo-0.5Zr alloy pipe with bimodal microstructure

Shuxian Peng, Yikui Liu, Mingzhu Fu, Kai Zhang et autres

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Effect of β Solution Treatment on Microstructure and Dynamic Mechanical Properties of Ti–6Cr–5Mo–5 V–4Al Alloy

Xin Wang, Xinyue Cui, Weizhong Feng, Changheng Li et autres

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Study on Optimization of Reheat Pressure after Retrofit of Coal-fired Power Plants for Heat Supply

Tao Zhang, Weizhong Feng, Yan Li

Abstract After the retrofit of condensing power unit for heat supply, the reheat pressure of the unit deviates from the optimal value. When the heat supply and flow path of the turbine are retrofitted synchronously, or the retrofit of flow path is …

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The high-temperature retrofit research and application of subcritical units

Weizhong Feng, Li Li

China’s national demonstration project achieves around 50% net efficiency with 600 °C class materials

Weizhong Feng

A High Efficiency Coal-Fired Power Technology With Elevated and Conventional Turbine Layout

Weizhong Feng

The bottlenecks which in developing high-efficiency Ultra Super Critical (USC) coal power technology is analyzed under the background of great pressure of reducing CO2 emission on coal power industry. The development of 700°C Advanced Ultra Super Critical (A-USC) technology has been much …