Next Article in Journal
Enhancement in Nanomechanical, Thermal, and Abrasion Properties of SiO2 Nanoparticle-Modified Epoxy Coatings
Previous Article in Journal
SiOC-Coated Silicon Nitride Platform for Efficient Phase Actuators
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Coatings
Volume 10
Issue 4
10.3390/coatings10040311
coatings-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Evolution of Microstructure at the Surface of 40CrNiMo7 Steel Treated by High-Current Pulsed Electron Beam

by
Huihui Wang
1,
Lianfu Li
1,
Sen Qiu
2,*,
Weidong Zhai
1,
Qiaomin Li
1 and
Shengzhi Hao
3
1
School of Fundamental Education, Dalian Neusoft University of Information, Dalian 116023, China
2
Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education, Dalian University of Technology, Dalian 116024, China
3
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams & School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(4), 311; https://doi.org/10.3390/coatings10040311
Submission received: 26 February 2020 / Revised: 17 March 2020 / Accepted: 19 March 2020 / Published: 25 March 2020
Browse Figures
Review Reports Versions Notes

Abstract

High current pulsed electron beam (HCPEB) has recently been developed as an effective technique of material surface modification. In this research, a self-developed HCPEB equipment (HOPE-I) was adopted to perform surface modification on quenched and tempered 40CrNiMo7 steel. A composite nanometer structure was formed on the modified surface layer, and the martensite transformation and the dissolution and fracture of cementite can be observed. After initial irradiation, the high cooling rate caused the formation of nanocrystalline on the surface. With continuous irradiation treatments, the cooling rate gradually reduced, while the carbon kept dissolving and ended with surface composition homogenization. Both competitive factors result in the evolution rule of nanometer dimensions of surface structure. After HCPEB treatment, the average size of austenite phase on the modified surface decreased from micron-sized to nanoscale. The corrosion rate decreased from 0.12 mm/a to 0.02 mm/a, showing remarkable improvement of corrosion resistance. The main factors of the improvements of corrosion resistance property are the flat, dense structured and preferred crystal orientation on the modification layer of the treated material surface.
Keywords: high current pulsed electron beam; 40CrNiMo7 steel; surface nanocrystallization; surface modification high current pulsed electron beam; 40CrNiMo7 steel; surface nanocrystallization; surface modification

Share and Cite

MDPI and ACS Style

Wang, H.; Li, L.; Qiu, S.; Zhai, W.; Li, Q.; Hao, S. Evolution of Microstructure at the Surface of 40CrNiMo7 Steel Treated by High-Current Pulsed Electron Beam. Coatings 2020, 10, 311. https://doi.org/10.3390/coatings10040311

AMA Style

Wang H, Li L, Qiu S, Zhai W, Li Q, Hao S. Evolution of Microstructure at the Surface of 40CrNiMo7 Steel Treated by High-Current Pulsed Electron Beam. Coatings. 2020; 10(4):311. https://doi.org/10.3390/coatings10040311

Chicago/Turabian Style

Wang, Huihui, Lianfu Li, Sen Qiu, Weidong Zhai, Qiaomin Li, and Shengzhi Hao. 2020. "Evolution of Microstructure at the Surface of 40CrNiMo7 Steel Treated by High-Current Pulsed Electron Beam" Coatings 10, no. 4: 311. https://doi.org/10.3390/coatings10040311

APA Style

Wang, H., Li, L., Qiu, S., Zhai, W., Li, Q., & Hao, S. (2020). Evolution of Microstructure at the Surface of 40CrNiMo7 Steel Treated by High-Current Pulsed Electron Beam. Coatings, 10(4), 311. https://doi.org/10.3390/coatings10040311

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop