Results 191 to 200 of about 7,880,006 (253)

Research on Surface Nanocrystallization of Surfacing Layer by Pre-loading Rolling Technology

Integrated Ferroelectrics, 2015
The surface microstructure of the surfacing layer was optimized by refining the coarse grains to nanocrystalline by means of pre-loading rolling treatment(PLRT). By using of field emission scanning electron microscope and transmission electron microscopy observations, the microstructural features in the treated surfacing layer were characterized, and ...
Dema Ba, Fanjun Meng
openaire   +1 more source

Local surface nanocrystallization for buckling-resistant thin-walled structures

International Journal of Mechanics and Materials in Design, 2020
An innovative and new technology on enhancing buckling resistance is established in this work by making use of local surface nanocrystallization to significantly improve the critical loads of thin-walled structures under axial compression loads. By capitalizing new design approaches of local nanocrystallization, critical loads of thin-walled structures
Xinsheng Xu, Zhen Zhao, Zhenhuan Zhou, Wei Wang, Zhenzhen Tong, C. W. Lim   +5 more
openaire   +1 more source

Effect of surface nanocrystallization on fatigue properties of Ti–6Al–4V alloys with bimodal and lamellar structure

Materials Science & Engineering: A, 2021
High-energy shot peening (HESP) was employed to obtain a nanocrystalline surface layer in Ti-6Al-4V alloy with bimodal and lamellar structure. The microstructure and residual stress after HESP treatment were characterized by transmission electron ...
Conghui Zhang, Kun Hu, Min Zheng, Wenguang Zhu, Guodong Song   +4 more
semanticscholar   +1 more source

Investigation of Surface Nanocrystallization by Pre-Forceing Rolling Technology

Advanced Materials Research, 2013
For solving fatigue failure of surface on the metal parts, the Surface Nanocrystallization technology by pre-forceing rolling was developed. The feature and operaing principle of equipment were introduced. A nanocrystalline surface layer was fabricated on deposited layer by using pre-forceing rolling technology (PFRT) .The microstructure of treated ...
Jia Wu He, Shi Ning Ma, De Ma Ba
openaire   +1 more source

Slurry erosion induced surface nanocrystallization of bulk metallic glass

Applied Surface Science, 2018
Abstract Microstructure evolution and phase transformation of metallic glasses (MGs) could occur under heating condition or mechanical deformation. The cross-section of as-cast Zr55Cu30Ni5Al10 MG rod was impacted by the solid particles when subjected to erosion in slurry flow.
Xiulin Ji, Jili Wu, Jinghong Pi, Jiangbo Cheng, Yiping Shan, Yingtao Zhang   +5 more
openaire   +1 more source

Surface nanocrystallization of iron induced by ultrasonic shot peening

Nanostructured Materials, 1999
A nanocrystalline surface layer was fabricated on a pure Fe plate by using an ultrasonic shot peening (USSP) technique. The USSP induced surface nanocrystallization products were characterized by means of X-ray diffraction (XRD) and transmission electron microscope (TEM).
N.R Tao, M.L Sui, J Lu, K Lua
openaire   +1 more source

Developing a nanostructured surface layer on AISI 316 stainless steel by ultrasonic surface nanocrystallization and evaluating its tribological properties

Surface Topography Metrology and Properties, 2021
Austenitic stainless steels have received a lot of attention for a wide range of applications, including petrochemical, automotive industry, building architecture, and bioengineering; however, their poor mechanical properties such as high wear rate are ...
Masoud Hosseini Ballam, F. Karimzadeh, M. Enayati, A. Sanati   +3 more
semanticscholar   +1 more source

Thermal stability of nanocrystalline layers fabricated by surface nanocrystallization

Applied Surface Science, 2010
Abstract A nanocrystalline layer with ultrafine grains (about 30–40 nm) on the surface of 7050 aluminum alloy was fabricated by a new technique called High Pressure Shot Peening (HPSP) which is the combination of common Shot Peening equipment with a pressurizing vessel.
Yong-jin Mai, Xiao-hua Jie, Li-li Liu, Neng Yu, Xiang-xin Zheng   +4 more
openaire   +1 more source

Electrochemical Impedance Spectroscopic Analyses of the Influence of the Surface Nanocrystallization on the Passivation of Carbon Steel in the Pore Solution

, 2021
This research aimed to apply different models on electrochemical impedance spectroscopy to study the influence of grain refinement and straining obtained from surface mechanical attrition t...
H. Torbati-Sarraf, Liang Ding, I. Khakpour, A. Poursaee   +3 more
semanticscholar   +1 more source

Surface Nanocrystallization of Ti-6Al-4V Alloy: Microstructural and Mechanical Characterization

Journal of Nanoscience and Nanotechnology, 2012
In this study, microstructural and mechanical properties of Ti-6Al-4V alloy, before and after the SMA treatment (SMAT) as well as the duplex SMAT/Nitriding process at different treatment conditions, were investigated in order to deepen the knowledge of these properties for biomedical devices. For that purpose, tribological (wear resistance, coefficient
Pi, Yuanyuan, Faure, Joël, Agoda, Guéba, Andreazza, Caroline, Potiron, Sébastien, Levesque, Alexandra, Demangel, Clémence, Retraint, Delphine, Benhayoune, Hicham   +8 more
openaire   +4 more sources