A novel crack healing in steels by gas nitrocarburizing

A novel crack healing in steels by gas nitrocarburizing Applied Surface Science 442 (2018) 437–445 Contents lists available at ScienceDirect Applied Surface Science journal homepage: www.elsevier.com/locate/apsusc Full Length Article a,b a a,⇑ a a,c a Ai Li , Xing Chen , Chengsong Zhang , Guodong Cui , Hui Zhao , Chuan Yang School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China CRRC Qingdao SiFang Co., Ltd, Qingdao 266111, China article i nfo abstract Article history: In this paper, the gas nitrocarburizing technique was applied for the first time to solve the challenge in Received 6 October 2017 crack healing of metallic materials. The crack-healing behavior of 42CrMo steel was investigated. The gas Revised 28 January 2018 nitrocarburizing was carried out in two steps with the decrease of the healing temperature. The mechan- Accepted 18 February 2018 ical properties after healing were measured using the three-point blending test. X-ray diffraction, optical Available online 21 February 2018 microscope and scanning electron microscopy were applied to characterize the phase composition and microstructure of crack healing area and analyze healing mechanisms involved. The results show that Keywords: the optimal healing effect could be obtained when it is healed at http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Precambrian Research Elsevier

A novel crack healing in steels by gas nitrocarburizing

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0301-9268
eISSN
1872-7433
D.O.I.
10.1016/j.apsusc.2018.02.181
Publisher site
See Article on Publisher Site

Abstract

Applied Surface Science 442 (2018) 437–445 Contents lists available at ScienceDirect Applied Surface Science journal homepage: www.elsevier.com/locate/apsusc Full Length Article a,b a a,⇑ a a,c a Ai Li , Xing Chen , Chengsong Zhang , Guodong Cui , Hui Zhao , Chuan Yang School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China CRRC Qingdao SiFang Co., Ltd, Qingdao 266111, China article i nfo abstract Article history: In this paper, the gas nitrocarburizing technique was applied for the first time to solve the challenge in Received 6 October 2017 crack healing of metallic materials. The crack-healing behavior of 42CrMo steel was investigated. The gas Revised 28 January 2018 nitrocarburizing was carried out in two steps with the decrease of the healing temperature. The mechan- Accepted 18 February 2018 ical properties after healing were measured using the three-point blending test. X-ray diffraction, optical Available online 21 February 2018 microscope and scanning electron microscopy were applied to characterize the phase composition and microstructure of crack healing area and analyze healing mechanisms involved. The results show that Keywords: the optimal healing effect could be obtained when it is healed at

Journal

Precambrian ResearchElsevier

Published: May 1, 2018

References

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