Next Article in Journal
Strengthening of Aluminum Wires Treated with A206/Alumina Nanocomposites
Previous Article in Journal
Factors Affecting the Power Conversion Efficiency in ZnO DSSCs: Nanowire vs. Nanoparticles
Open AccessArticle

Sulfide Stress Cracking Behavior of a Martensitic Steel Controlled by Tempering Temperature

by Yu Sun 1,2, Qian Wang 1,3, Shunjie Gu 1,2, Zaoneng He 1,3, Qingfeng Wang 1,3,* and Fucheng Zhang 1,3
1
Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
2
Technical Center, Tianjin Pipe (Group) Corporation Limited, Tianjin 300301, China
3
National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 412; https://doi.org/10.3390/ma11030412
Received: 18 January 2018 / Revised: 1 March 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
A medium-carbon Cr–Mo–V martensitic steel was thermally processed by quenching (Q) at 890 °C and tempering (T) at increasing temperatures from 650 °C to 720 °C and the effect of tempering temperature, Tt, on sulfide stress cracking (SSC) behaviors was estimated mainly via double cantilever beam (DCB) and electrochemical hydrogen permeation (EHP) tests and microstructure characterization. The results indicate that the threshold stress intensity factor for SSC, KISSC, increased with increasing Tt. The overall and local H concentration around the inclusions decreased with increasing Tt, due to reductions in the amounts of solute atoms, grain boundaries and dislocations, which effectively prevented SSC initiation. Also, increasing Tt caused an increased fraction of high-angle boundaries, which evidently lowered the SSC propagation rate by more frequently diverting the propagating direction and accordingly restricted SSC propagation. The overall SSC resistance of this Q&T–treated steel was therefore significantly enhanced. View Full-Text
Keywords: sulfide stress cracking (SSC); martensitic steel; tempering; double cantilever beam test; hydrogen permeation; SSC initiation; SSC propagation sulfide stress cracking (SSC); martensitic steel; tempering; double cantilever beam test; hydrogen permeation; SSC initiation; SSC propagation
Show Figures

Figure 1

MDPI and ACS Style

Sun, Y.; Wang, Q.; Gu, S.; He, Z.; Wang, Q.; Zhang, F. Sulfide Stress Cracking Behavior of a Martensitic Steel Controlled by Tempering Temperature. Materials 2018, 11, 412.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop