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Dr. Xinfeng Li
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
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7Years (2020-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications22 April 2020 in Acta Metallurgica Sinica (English Letters)
Journal Article
XLXinfeng Li
Xinfeng LiXMXianfeng Ma
Xianfeng Ma
JZJin Zhang
Jin Zhang
Eiji AkiyamaYWYanfei Wang
Yanfei WangXSXiaolong Song
Xiaolong Song
Journal Article
ZFZheng Feng
Zheng FengXLXinfeng Li
Xinfeng LiXSXiaolong Song
Xiaolong SongTGTang Gu
Tang Gu
Yong ZhangThe hydrogen embrittlement (HE) behaviors of a CoCrFeMnNi high-entropy alloy (HEA), 304 stainless steel (304SS) and IN718 alloys were studied and compared via electrochemical hydrogen pre-charging, slow strain rate tensile tests, and fracture surface analysis. The results demonstrate that the HEA exhibited the greatest HE-resistance, followed by 304SS and then IN718 alloy, when the alloys were charged at 1.79 mA cm−2 for 24 h and 48 h, and 179 mA cm−2 for 2 h. Hydrogen-induced reduction in ductility was observed for 304SS and IN718 alloys, whereas the hydrogen-affected fracture strain of the HEA was dependent on the hydrogen charging time. The resistance to HE was improved at a short hydrogen charging time (24 h), but reduced at a long charging time (48 h). This is attributed to the competing mechanisms between hydrogen-enhanced twin formation and HEDE (hydrogen-enhanced decohesion).
Journal Article
XLXinfeng Li
Xinfeng LiYWYao Wang
Yao WangWHWeihong Huang
Weihong HuangJZJin Zhang
Jin ZhangXWXubin Wu
Xubin WuThe effect of surface roughness on hydrogen-induced blister behavior in pure iron was explored using optical microscopy and microcomputerized tomography. Hydrogen was introduced into the samples by electrochemical precharging methods with various hydrogen charging times. It is found that grinded surface exhibits higher roughness and compressive residual stress compared to those of polished surface. With increasing hydrogen charging time, hydrogen-induced blister height, blister width and blister area fraction increase, regardless of the grinded surface and polished surface. Further, hydrogen blister height and width of grinded surface are comparative to polished surface under the same hydrogen charging time. However, the blister area fraction and the number of blister on polished surface are considerably higher than the grinded surface, indicating that polished surface is more susceptible to the formation of blisters than that of grinded surface, both of surface and interior of the samples. This is dominantly rationalized in terms of the suppression effect of hydrogen invasion in grinded surfaces due to their higher residual compressive stress and higher dislocation density.
13 September 2024 in Materials Today Communications
Journal Article
Journal Article
YHYuting Huang
Yuting HuangJCJihan Chen
Jihan ChenYWYanfei Wang
Yanfei WangWLWei Liu
Wei LiuWWWeijie Wu
Weijie WuXYXinyu Yang
Xinyu Yang +1
A simple, physically based model is developed to quantitatively predict the degradation of hydrogen on the crack growth critical stress intensity factor (CSIF) of metals. The model is formulated by combining a microscopically shielded Griffith criterion (MSGC) model for plasticity-induced cleavage fracture and thermodynamics decohesion (TDD) theory for hydrogen-enhanced interface decohesion. The hydrogen-influenced CSIF is described as a function of the intrinsic CSIF (hydrogen-free), initial hydrogen concentration (solubility), hydrogen trap binding energy and crack tip stress. All parameters in the model can be determined with a physical basis and the model is successfully validated by comparison with published experimental data.
Journal Article
XLXinfeng Li
Xinfeng LiYLYang li ，JIng Liu
Yang li ，JIng LiuYCYan CUI
Yan CUIJHJun Hui
Jun HuiJFJian Xun Fu
Jian Xun FuJZJin Zhang
Jin ZhangIn this study, the interfacial cracking mechanism of Cr-coated Zircaloy cladding tubes was investigated through a combination of tensile testing, advanced microstructural characterization, and first-principle calculations. The results demonstrate the presence of an interlayer (33 nm) between the Cr coating and the Zr substrate, which consists of Cr and O elements. In comparison with the coherent Cr/interlayer interface, the incoherent interlayer/Zr interface is conducive to crack initiation and propagation, resulting from local high strain concentration generated by incompatible deformation between the interlayer and Zr substrate, and O-induced reductions in Cr/Zr interfacial cohesive strength.
About Me
Xinfeng Li received his bachelor’s degree in metal materials engineering from Xi’an Technological University in 2010 and his doctorate in materials science and engineering from Xi’an Jiaotong University in 2017. He is currently an associate professor and master’s supervisor at the Sino-French School of Nuclear Engineering and Technology, Sun Yat-sen University. His research interests include environmental fracturing of metal structural materials (hydrogen embrittlement, stress corrosion, corrosion fatigue), strengthening and toughening of metal structural materials, finite element analysis, and reliability analysis of metal materials. The research projects he participated in include a study of the low-temperature mechanical properties of ultrafine-grained pure magnesium, a study of the environmental fracture behavior of steel for turbine blades, and an evaluation of the fracture toughness of metal materials based on the new SNTT method. He has been invited as a reviewer for journals such as Corrosion Science, the International Journal of Hydrogen Energy, Engineering Fracture Mechanics, Metallurgical and Materials Transactions A, and Materials, and he has long served as a reviewer for the International Journal of Materials Science and Applications.