Cyclic stress induced phase transformation insuper-bainitic microstructure

doi:10.1088/1674-1056/26/3/038101

Abstract The effects of cyclic stress loading on the microstructual evolution and tensile properties of a medium-carbon super-bainitic steel were investigated. Experimental results show that the cyclic stress can induce the carbon gathering in austenite and phase transformation from film-like retained austenite to twin martensite, which will obviously enhance the tensile strength and the product of tensile strength and ductility. The higher the bainitic transformation temperature, the lower the transformation rate of the retained austenite. The amount and thickness of the film-like retained austenite play an important role during the cyclic stress induced phase transformation.

Keywords: super-bainite cyclic stress retained austenite phase transformation

Received: 08 August 2016
Revised: 22 November 2016
Accepted manuscript online:

PACS:	81.05.Bx	(Metals, semimetals, and alloys)
	62.20.-x	(Mechanical properties of solids)
	81.30.-t	(Phase diagrams and microstructures developed by solidification and solid-solid phase transformations)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51171030 and 51604034), the Scientific and Technological Planning Project of Jilin Province, China (Grant No. 20150520030JH), and the Scientific and Technological Research Fund of Jilin Provincial Education Department during the Twelfth Five-year Plan Period, China (Grant No. 2015-95).

Corresponding Authors: Ying Han, Hua Wu
E-mail: hanying_118@sina.com;wuhua@ccut.edu.cn

Cite this article:

Wencui Xiu(修文翠), Ying Han(韩英), Cheng Liu(刘澄), Hua Wu(吴化), Yunxu Liu(刘云旭) Cyclic stress induced phase transformation insuper-bainitic microstructure 2017 Chin. Phys. B 26 038101

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