Sun Jun, professor of the School of Materials Science and Engineering, Xi'an Jiaotong University (XJTU)

Professor Sun Jun of the School of Materials Science and Engineering, Xi'an Jiaotong University (XJTU) was elected academician of the Chinese Academy of Sciences, on Nov 18.

Sun, born in Changchun, Northeast China's Jilin province, in 1959, is the director of the XJTU State Key Laboratory for Mechanical Behavior of Materials Strength and an expert in metal structural materials. 

He has long been engaged in the research of deformation, phase transformation and strengthening and toughening of metal materials.

Aiming at the major problem of the inverted relationship between alloy strength and toughness, Sun made systematic innovations in the theory and application of alloy strength and toughness.

He proposed a new idea of strengthening and toughening the heterogeneous interface, established a multi-scale second-phase coupling strengthening and toughening model of the alloy, and discovered the significant appearance and intrinsic size effects of metal deformation twins and the strength of nano-multilayer film micro-nano cylinders. 

Based on this, several high-strength and tough alloys and nano-multilayer film preparation technologies have been invented, and large-scale applications have been realized.