Zidong Wang

Prof. Dr. Zidong Wang

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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26 January 2009 in Nanotechnology
Verified
Journal Article
Closed access
ZWZidong Wang
Zidong Wang
XWXuewen Wang
Xuewen Wang
QWQiangsong Wang
Qiangsong Wang
ISI Shih
I Shih
JXJ J Xu
J J Xu
In situ iron nanoparticle reinforced Cu-3Sn-8Zn-6Pb alloy has been fabricated by centrifugal casting in a vacuum chamber with a medium frequency electrical furnace. The microstructure of this alloy was analyzed with a scanning electron microscope (SEM) and a high-resolution transmission electron microscope (HRTEM), and the results show that the grains of Cu-3Sn-8Zn-6Pb alloy without iron have a typical dendrite structure with dimensions from 500 to 1500 microm, and the grains of the alloy with the addition of 1% iron are small and equiaxed, with dimensions from 20 to 60 microm. Then, the relatively uniform dispersed particles in the copper matrix were identified with the HRTEM to be pure iron with dimensions in the order of 2-20 nm. The mechanical properties of the alloys were measured and the results show a significant increase in the tensile strength of the alloy with iron nanoparticles and a slight increase of the elongation compared to that without iron. The mechanism of formation of the iron nanoparticles was analyzed by thermodynamic and dynamic theories, and the results indicate that the in situ iron nanoparticles of Cu-3Sn-8Zn-6Pb alloy can reasonably form during solidification in the centrifugal casting technique.

1 September 2018 in Journal of Alloys and Compounds
Verified
Journal Article
Closed access
KCKaixuan Chen
Kaixuan Chen
XCXiaohua Chen
Xiaohua Chen
ZWZidong Wang
Zidong Wang
HMHuahai Mao
Huahai Mao
RSRolf Sandström
Rolf Sandström

3 December 2018 in Applied Sciences
Verified
Journal Article
Open access
PDF file
SPShiwei Pan
Shiwei Pan
XZXianglin Zhou
Xianglin Zhou
KCKaixuan Chen
Kaixuan Chen
MYMing Yang
Ming Yang
YCYudong Cao
Yudong Cao
ZWZidong Wang
Zidong Wang
Over the past several years, coherent interface strengthening was proposed and has since drawn much attention. Unfortunately, many fabrication techniques are restricted to very small size. Recently, a brand new method of in-situ nanoparticle strengthening was systematically investigated, which was proved to be an efficacious way to optimize microstructure and improve mechanical property by utilizing uniformly dispersed nanoparticles. In this review, we summarized recent related advances in investigated steels and Cu alloys, including details of preparation technique and characterization of in-situ nanoparticles. In-situ nanoparticles formed in the melt possess a coherent/semi-coherent relationship with the matrix, which has a similar effect of coherent interface strengthening. In this case, bulk metallic structural materials with dispersed nanoparticles in the matrix can be fabricated through conventional casting process. The effects of in-situ nanoparticles on grain refinement, inhibiting segregation, optimizing inclusions and strengthening are also deeply discussed, which is beneficial for obtaining comprehensive mechanical response. Consequently, it is expected that in-situ nanoparticle strengthening method will become a potential future direction in industrial mass production.

9 March 2017 in Steel Research International
Verified
Journal Article
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XLXiang Luo
Xiang Luo
Xiaohua ChenXiaohua Chen
Xiaohua Chen
ZWZidong Wang
Zidong Wang

18 January 2021 in International Journal of Minerals, Metallurgy and Materials
Verified
Journal Article
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XYXing-Hai Yang
Xing-Hai Yang
Xiaohua ChenXiaohua Chen
Xiaohua Chen
SPShi-Wei Pan
Shi-Wei Pan
ZWZidong Wang
Zidong Wang
KCKai-Xuan Chen
Kai-Xuan Chen
JQJun-Wei Qin
Jun-Wei Qin

11 September 2022 in Metals
Verified
Journal Article
Open access
PDF file
Xiaohua ChenXiaohua Chen
Xiaohua Chen
WFWeijie Fan
Weijie Fan
WJWenwen Jiang
Wenwen Jiang
DLDeye Lin
Deye Lin
ZWZidong Wang
Zidong Wang
YWYanlin Wang
Yanlin Wang
Isothermal solidification process of pure metal Al was studied by molecular dynamics (MD) simulation using EAM potential. The effects of different cooling rates on the isothermal solidification process of metallic Al were studied. Al was first subjected to a rapid cooling process, and then it was annealing under isothermal conditions. The mean first-passage times (MFPT) method and Johnson-Mehl-Avrami (JMA) law were used to qualify the solidification kinetic processing, and the nucleation rate, critical nucleus size, Avrami exponent and growth exponent of grains were calculated. Results show that the nucleation rate and critical size decrease as the cooling rate increases. Also, an increase in the cooling rate leads to the increase of grain growth rate. At all investigated cooling rates, nucleation and growth processes are in the typical three-dimensional growth mode.