Next Article in Journal
Laser Shock Peening, the Path to Production
Next Article in Special Issue
The Effects of Electrochemical Hydrogen Charging on Room-Temperature Tensile Properties of T92/TP316H Dissimilar Weldments in Quenched-and-Tempered and Thermally-Aged Conditions
Previous Article in Journal
Investigation of Nondestructive Testing Methods for Friction Stir Welding
Previous Article in Special Issue
The Role of Hydrogen in Hydrogen Embrittlement of Metals: The Case of Stainless Steel
Open AccessArticle

Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures

Department of Naval Architecture and Ocean Engineering, Pusan National University, 30, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, Korea
*
Author to whom correspondence should be addressed.
Metals 2019, 9(6), 625; https://doi.org/10.3390/met9060625
Received: 14 May 2019 / Revised: 26 May 2019 / Accepted: 27 May 2019 / Published: 29 May 2019
316L stainless steel is a promising material candidate for a hydrogen containment system. However, when in contact with hydrogen, the material could be degraded by hydrogen embrittlement (HE). Moreover, the mechanism and the effect of HE on 316L stainless steel have not been clearly studied. This study investigated the effect of hydrogen exposure on the impact toughness of 316L stainless steel to understand the relation between hydrogen charging time and fracture toughness at ambient and cryogenic temperatures. In this study, 316L stainless steel specimens were exposed to hydrogen in different durations. Charpy V-notch (CVN) impact tests were conducted at ambient and low temperatures to study the effect of HE on the impact properties and fracture toughness of 316L stainless steel under the tested temperatures. Hydrogen analysis and scanning electron microscopy (SEM) were conducted to find the effect of charging time on the hydrogen concentration and surface morphology, respectively. The result indicated that exposure to hydrogen decreased the absorbed energy and ductility of 316L stainless steel at all tested temperatures but not much difference was found among the pre-charging times. Another academic insight is that low temperatures diminished the absorbed energy by lowering the ductility of 316L stainless steel. View Full-Text
Keywords: cryogenic temperature; hydrogen embrittlement; impact load; charpy impact test cryogenic temperature; hydrogen embrittlement; impact load; charpy impact test
Show Figures

Graphical abstract

MDPI and ACS Style

Nguyen, L.T.H.; Hwang, J.-S.; Kim, M.-S.; Kim, J.-H.; Kim, S.-K.; Lee, J.-M. Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures. Metals 2019, 9, 625.

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