Yadi Zhai

Beijing University of Technology

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Yuan Ji

Taizhou University

Zhangpeng Bai

Beijing University of Technology

Xiaodong Han

Beijing University of Technology

Yiqun Pi

Beijing University of Technology

Yinqi Zhang

American University

Shengcheng Mao

Beijing University of Technology

Zhengguang Yan

Beijing University of Technology

Li Wang

Guizhou University

Yinong Liu

University of Western Australia

Qingsong Deng

Xiamen University

Cooperative Institutions

Beijing University of Technology

Nanjing University

University of Electronic Science and Technology of China

Shanghai Jiao Tong University

Chinese Academy of Sciences

University of Science and Technology Beijing

Peking University

Southern University of Science and Technology

Hefei University of Technology

Northwestern Polytechnical University

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Luminescence characteristics of individual Beijing haze aerosol particles

Atmospheric Environment (2018)

Li Wang Zhangpeng Bai Yiqun Pi Yadi Zhai Yinqi Zhang

Haze

Cathodoluminescence

Mineral dust

10.1016/j.atmosenv.2018.07.023

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Citations (3)

Timely and atomic-resolved high-temperature mechanical investigation of ductile fracture and atomistic mechanisms of tungsten

Nature Communications (2021)

Jianfei Zhang Yurong Li Xiaochen Li Yadi Zhai Qing Zhang

Abstract Revealing the atomistic mechanisms for the high-temperature mechanical behavior of materials is important for optimizing their properties for service at high-temperatures and their thermomechanical processing. However, due to materials microstructure’s dynamic recovery and the absence of available in situ techniques, the high-temperature deformation behavior and atomistic mechanisms of materials are difficult to evaluate. Here, we report the development of a microelectromechanical systems-based thermomechanical testing apparatus that enables mechanical testing at temperatures reaching 1556 K inside a transmission electron microscope for in situ investigation with atomic-resolution. With this unique technique, we first uncovered that tungsten fractures at 973 K in a ductile manner via a strain-induced multi-step body-centered cubic (BCC)-to-face-centered cubic (FCC) transformation and dislocation activities within the strain-induced FCC phase. Both events reduce the stress concentration at the crack tip and retard crack propagation. Our research provides an approach for timely and atomic-resolved high-temperature mechanical investigation of materials at high-temperatures.

10.1038/s41467-021-22447-y

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Citations (51)

Hygroscopic analysis of individual Beijing haze aerosol particles by environmental scanning electron microscopy

Atmospheric Environment (2017)

Zhangpeng Bai Yuan Ji Yiqun Pi Kaixiang Yang Li Wang

Haze

Single-Particle Analysis

10.1016/j.atmosenv.2017.10.031

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Citations (25)

Defects and Their Elemental Distributions in a Crept Co-Al-W-Ti-Ta Single Crystal Superalloy

Crystals (2020)

Yadi Zhai Luyan Yang Fei Xue Yanhui Chen Shengcheng Mao

The structure of defects and their elemental distributions is the decisive factor to metal’s mechanical properties. The γ/γ′ structure Co-Al-W-based superalloy is a potential replicable alloy to Ni-based superalloys that have been used for a long time. Revealing the microstructure of a defect induced by high-temperature crept provides direct clues for the alloy development. Our work revealed the high-resolution, high-angle annular dark field images and corresponding elemental distributions on crept defects. Defects in the γ phase mainly contain dislocation networks, while the γ′ phase contains lots of stacking faults and anti-phase boundaries. The results indicate that dislocation networks and stacking faults contain more weight elements than the base γ′ phase, while anti-phase boundaries contain more light elements. Disclosing atomic structure and its elemental distributions gives direct evidence for alloy design and further high-temperature mechanical improvement.

Stacking fault

10.3390/cryst10100908

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Citations (1)