Profile:

Academic background:

Professor and doctoral tutor in School of Materials Science and Engineering, Jiangsu University. Ph.D. graduated from Shanghai Jiao Tong University (studyed by Academician Ding Wenjiang and Professor Wang Qudong).

1.     The expert of National Science and Technology Experts Bank of Science and Technology Ministry.

2.     The project evaluation expert of International Science and Technology Cooperation Special Projects of Science and Technology Ministry.

3.     The peer review expert of National Natural Science Foundation of China (including the Joint Fund).

4.     The executive chairman of the organizing committee of "Seventh China-Norway Light Alloy and New Energy International Symposium".

5.     The communication review expert of Ph.D. and master thesis (sampling test) of Degree Center of Education Ministry.

6.     The evaluation expert of Guangdong Province Key Field R & D Program.

7.     The evaluation expert of Hebei Province Science and Technology Plan Project.

8.     The evaluation expert of Jiangxi Province Science and Technology Plan Project.

9.     The senior member of China Materials Research Society.

10.   The reviewer of Scripta Mater, J Mater Sci Technol, et al.

Research interest

1.     The research and application of nanocrystalline and nano heterogeneous metals and alloys

2.     Casting and deformed aluminum and magnesium alloys with high-performance

3.     Casting Ni-based superalloys

4.     Strengthening, toughening and microstructure characterization of metal materials, of metal materials

Strong theoretical and practical knowledge in materials science and engineering; proficient in microstructure analysis techniques such as transmission electron microscopy (TEM) and the application of crystal defects, especially dislocation theory in high-performance metals.

Scientific research projects and patent applications

More than 100 SCI papers have been published in Scripta Mater., Appl. Phys. Lett., Mater. Sci. Eng. A, J. Alloys Comp. and J. Mater. Sci., et al. and cited by SCI peer experts more than 900 times. H factor more than 30 and single paper can be cited more than 150 times. Hosted or participated in more than 40 scientific research projects of National Natural Science Foundation of China, Norwegian Research Council, National Defense Basic Research Program, 863 Key of Science and Technology Ministry and US General International Cooperation Project. As the first author, 7 national invention patents (of which 3 were authorized) have been applied, one of which was used in the production of the advanced motorcycle cylinder block of a Japanese company. At the same time, it has been used to the production of heat-resistant magnesium alloy products such as engine valve covers, reducer box and automotive transmission components by Shanghai Light Alloy Precision Forming National Engineering Research Center Co., Ltd.

Academic achievements

1. A special nanostructure with size of 4 nm and hexagonal shape was first discovered in severe plastic deformation Al–Mg–Si aluminum alloy. Appl. Phys. Lett. Reviewers believe that the discovery of the nanostructure is amazing and it is likely to have profound impact on the performance of materials (it has been cited by Mater Sci Eng A and other magazines more than 30 times);

2.   Some special stacking faults and nano twins have been observed in severe plastic deformation Al–Mg aluminum alloy. A new deformation mechanism for stacking faults and twins that exist in fcc ultrafine grains due to partial dislocations emitted from grain boundaries and the corresponding formula model of its critical grain size are proposed (it has been cited by Acta Mater and other magazines more than 60 times);

3.   The dislocation spreading method that stacking faults formed by Shockley partial dislocations obtained by the decomposition of 0 ° pure spiral type and 60 ° mixed full dislocations has been first observed in high pressure torsion Al–Mg alloys. 1/6 <110> Lomer-Cottrell locks formed by the encounter reaction of partial dislocation has been observed as well (it has been cited by Prog Mater Sci and other magazines more than 30 times);

4.   Low-angle and high-angle non-equilibrium grain boundaries, low-angle balanced grain boundaries, Σ9 balanced grain boundaries and twin boundary completely coherent with the matrix were observed in high pressure torsion Al–Mg alloys by HRTEM. The grain refinement mechanism of high-pressure torsion Al-Mg alloy was obtained (it has been cited by Prog Mater Sci and other magazines more than 30 times);

5.   The dynamic precipitation of fine β'' phase with average size of 4 nm and its interaction with dislocations have been found in severe plastic deformation Al-Mg-Si alloy (it has been cited by In. J. Plasticity and other magazines more than 150 times);

6.   The  dislocation expansion method of double edge plane slip and basal dislocation cross-slip to twin edge plane during the creep process of magnesium alloy was observed by TEM first time. The relevant Ph.D. thesis was highly evaluated by the reply committee and was recommended to be the national excellent Ph.D. thesis unanimously (it has been cited more than 50 times by Biomaterials, Mater Chem Phys and other magazines);

7.  Transmission electron microscopy and other systems were used to analyze the microstructure evolution law, dislocation evolution law, the interaction between slip and twinning and the effect of second phase on slipping and twinning during the creep process of heat-resistant magnesium alloys. A method to improve the heat resistance of commonly magnesium alloys was proposed. The research results provide inspiration and reference for further research and application of heat-resistant magnesium alloy.

Applied results

1.   Several nanocrystalline Al–Mg aluminum alloys，average grain size is less than 100 nm and strength is greater than 800 MPa,were prepared by high-pressure torsion.The highest yield strength reached 845 MPa, and its strength has reached the level of super-strong aluminum alloy (authorized patent).

2.   Some kinds of ultrafine-grain 6000-series Al–Mg–Si–(Cu) aluminum alloys with high strength and toughness have been prepared with ECAP. The average grain size is less than 300 nm. The maximum tensile strength, yield strength and uniform elongation are 459 MPa, 433 MPa and 12%, respectively. Its strength has reached the level of high-strength aluminum alloy (patent applied for).

3.   Several Mg-Al-Ca heat-resistant magnesium alloys with excellent room temperature, high temperature strength and high temperature creep resistance have been prepared by Ti microalloying. Relevant authorized patents have been successfully used in the production of high-pressure die-casting parts of heat-resistant magnesium alloy cylinder liners for a advanced racing car of a Japanese company (authorized patent).

4.   Several Mg-Al series magnesium alloys with high strength and high plasticity have been prepared by Ti microalloying. The method has low cost and simple process. The relevant authorized patents have been widely used in the development of high-end rare earth magnesium alloy parts with high-performance such as automobile wheel hub and mast of lunar rover in Shanghai Jiaotong University (authorized patent).