Associate Professor Long Xin
Keywords：Friction and wear; Fretting corrosion; Severe plastic deformation
Contact：long_xin@ustb.edu.cn
Researches
Long Xin is an Assistant Research Fellow in the National Center for Materials Service Safety at the University of Science and Technology Beijing. His research areas include fretting wear, fretting corrosion, crevice corrosion, flow accelerated corrosion (FAC), the mechanical or functional behavior of alloys at all length scales down to nanostructures, and surface nanocrystallization for enhancing the resistance of wear and corrosion.
l Main Projects
- Project 1 : Beijing Natural Science Foundation (2194081), total fund 100000 RMB, 2019-2020.
- Project 2 : Project funded by China Postdoctoral Science Foundation (2018M641187), total fund 50000 RMB, 2019-2020.
- Project 3 : The Fundamental Research Funds for the Central Universities (FRF-TP-18-047A1), total fund 100000 RMB, 2019-2020.
l Main Contributions
- Macro-properties of materials such as wear volume and friction coefficient were investigated with variation of fretting parameters including mechanical aspects (hardness, slip amplitude, normal force, frequency and cycle number), environments (temperature, controlled atmosphere), and water chemistry (pH).
- Micro-properties of subsurface structure, physical and chemical changes as well as microstructural changes were investigated by Raman, AES, SEM, HRTEM and EBSD.
- Microstructure evolution from bulk material to the nanostructured layer, finally to ultrafine tribolayer has been clarified, which is the fundamental to dominate the macro-properties.
l Publications
1. L. Xin, X. Liang, Y.M. Han, Y.H. Lu, T. Shoji, Investigation into the fretting corrosion of alloy 690 TT against type 304 stainless steel in high temperature pure water under partial slip conditions. Tribology International. 134 (2019) 93-101.
2. L. Xin, M. Ma, Y.H. Lu, T. Shoji, Comparative study on fretting wear behaviors of Alloy 600MA in dry air and deionized water conditions. Wear. 148-149 (2019) 167-179.
3. L. Xin, B.B. Yang, J. Li, Y.H. Lu, T. Shoji, Microstructural characteristics of Alloy 690TT subjected to fretting corrosion in high temperature water. Corrosion Science. 123 (2017) 116-128.
4. L. Xin, Y.H. Lu, T. Shoji, The comparative study on nanostructured tribolayers of Alloy 690TT subjected to fretting wear under different oxygen contents. Materials Characterization. 131 (2017) 157-167.
5. L. Xin, J. Li, Y.H. Lu, T. Shoji, Wear damage of Alloy 690TT in partial and gross slip fretting regimes at high temperature. Wear. 390-391（2017） 71-79.
6. L. Xin, Y.H. Lu, T. Shoji, The role of frequency on fretting corrosion of Alloy 690TT against 304 stainless steel in high temperature high pressure water. Materials Characterization. 134 (2017) 260-273.
7. L. Xin, Y.H. L, T. Shoji, The role of material transfer in fretting wear behavior and mechanism of Alloy 690TT mated with Type 304 stainless steel Materials Characterization. 130 (2017) 250-259.
8. L. Xin, H.J. Luo, J.L. Han, Y.H. Lu, T. Shoji, Damage mechanism of Alloy 690TT mated with Type 304 stainless steel during fretting wear in partial slip regime. Materials Characterization. 132 (2017) 284-292.
9. L. Xin, Z.H. Wang, J. Li, Y.H. Lu, T. Shoji. Fretting wear behavior and mechanism of Inconel 690 alloy related to displacement amplitude. Tribology Transactions. 60： 5 (2017) 913-922.
10. L. Xin, B.B. Yang, Z.H. Wang, J. Li, Y.H. Lu, T. Shoji, Microstructural evolution of subsurface on Inconel 690TT alloy subjected to fretting wear at elevated temperature, Materials & Design. 104 (2016) 152-161.