Introduction

Yonghua Rong, born in August, 1950, is a professor of the School of Materials Science and Engineering, Shanghai Jiao Tong University...

Biographical Information

Yonghua Rong, born in August, 1950, is a professor of the School of Materials Science and Engineering, Shanghai Jiao Tong University. He graduated from University of Science and Technology Beijing, majoring in Metal Physics. Prof. Rong, as a senior visiting scholar in Lehigh University in USA, studied Inconel 718 alloy by TEM from 1994 to 1995. He authored a Chinese textbook of Introduction to Analytical Electron Microscopy （Higher Education Press in 2006）for graduates and an English monograph of Characterization of Microstructures by Analytical Electron Microscopy (AEM)（Higher Education Press and Springer in2012）, and co-authored a Chinese textbook of Fundamentals of Materials Science （Shanghai Jiao Tong University Press, Third Edition in 2010）and Microstructural Characterization of Materials (Shanghai Jiao Tong University Press in 2012) for undergraduates. 
Prof. Rong has published more than 100 SCI papers. He and his co-researchers developed three new methods on the precise determination of electron beam direction and determination of local stacking fault probability in FCC crystals by diffraction spot shift as well as on X-ray peak-shift determination of average fault probability in alloys. Prof. Rong and his Ph. D. students established equation predicting the critical size of high temperature phase stabilized in room temperature and suggested the intrinsic conditions of phase stability in nanocrystalline materials, established kinetic equation of the effect of thickness on grain growth in nanocrystalline films. In addition, they developed TRIP steel with tensile strength of 1000MPa, TWIP steel with product of strength and elongation of over 70000MPa% and Q-P-T steel with product of strength and elongation of over 30000MPa%, Recently, they suggested a new effect of retained austenite on ductility enhancement of high strength steels, i.e., the DARA (the dislocation absorption by the retained austenite ) effect . Besides, they developed the phase field model with temperature dependence and successfully simulated the microstructural evolution in forward and reverse thermoelastic martensitic transformations, which theoretically verified the driving force of reverse martensitic transformation from the strain energy produced by forward martensitic transformation.

Research Interests

[1] The design and application of advanced high strength steels;
[2] Phase transformation and phase stability in nanocrystalline materials;
[3] Shape memory alloys and phase field modeling and simulation of their microstructural evolution.

Selected Publications

[1] K. Zhang, M. H. Zhang, Z. H. Guo, N. L. Chen and Y. H. Rong. A new effect of retained austenite on ductility enhancement in high-strength quenching–partitioning–tempering  martensitic  steel Mater. Sci. Eng. A ,528 (2011) 8486
[2] Y. H. Rong. High strength ductility steels treated by novel quenching–partitioning–tempering process, International Heat Treatment and Surface Engineering, 5(2011) 145
[3] J. Man,  J. H. Zhang, Y. H. Rong. Microstructural evolution of Mn-rich antiferromagnetic Mn-Cu alloy under temperature field, Applied Physics Letters, 96(2010)131904
[4] X. D. Wang, N. Zhong, T. Y. Hsu, Y. H. Rong, L. Wang, Novel ultrahigh-strength nanolath martensitic steel by quenching–partitioning–tempering process, Journal of Materials Research, 24(2009)260
[5] Zhinan An, Hong Ding, Qingping Meng and Yonghua Rong. Kinetic equation of the effect of thickness on grain growth in nanocrystalline films, Scripta Materialia 61 (2009) 1012
[6] B. X. Huang, X. D. Wang, L. Wang, Y. H. Rong. Effect of Nitrogen on Stacking Fault Formation Probability and Mechanical Properties of Twinning-Induced Plasticity Steels. Metallurgical and Materials Transactions A, 39 (2008) 717
[7] X. D. Wang, B. X. Huang, Y. H. Rong. On the deformation mechanism of twinning-induced plasticity steel. Philosophical Magazine Letters, 88 (2008) 845
[8] X. D. Wang, B. X. Huang, Y. H. Rong, L. Wang, Determination of stacking fault probability in fcc Fe–Mn–Si–Al alloy by electron diffraction. Journal of Applied Physics, 101 (2007) 093511
[9] Q. P. Meng, N. Zhou, Y. H Rong, S. Chen, T. Y. Hsu, Size effect on the Fe Nanocrystalline phase transformation, Acta Mater. 50(2002) 4563
[10] Qingping Meng, Yonghua Rong, T. Y. Hsu, The nucleation barrier for phase transformations in nanosized crystals, Phy. Rev. B,65(2002)174118

Research Projects

Projects from the National Natural Science Foundation of China
1.        The formation and crystallization of amorphous particles and their effects on giant magnetoresistance and magnetic properties(50071033),(2001.01-2003.12)
2.        The study of twinning induced plasticity steel with nitrogen(50571060), (2006.01-2008.12)
3.        The reverse martensitic transformation in nanocrystalline materials and thermal stability of nanosized grains(50871069),(2009.01-2011.12)
4.         The micro-mechanism of ductility enhancement by deformation induced transformation in advanced high strength steels(51031001),(2011.01-2014.12)

Honors & Awards

1. The Second Class Prize of China University Natural Science in 2000,
2. The First Class Prize of National Teaching Achievement in 2001,
3. The Second Class Prize of Shanghai Science and technology Achievement in 2004.