The dependence of hydrogen embrittlement on hydrogen transport in selective laser melted 304L stainless steel

Zhou, Zhengrong; Zhang, Kaiyu; Hong, Yuanjian; Zhu, Haohao; Wan-liang, Zhang; He, Yanlin; Zhou, Chengshuang; Zheng, Jinyang

doi:10.1016/j.ijhydene.2021.02.035

Cited by 28 publications

(5 citation statements)

References 56 publications

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“…The thin sections have more surface flaws than the thick sections, which act as irreversible H-trapping sites. Therefore, the surface flaws cause irreversible H uptake, and a large amount of energy (more than 60 kJ/mol) is then required for the H to be diffused out [ 21 , 25 ]. Consequently, HE susceptibility decreases with an increase in the surface flaws on the thin sections, such as in the auxetic structure of T0.6.…”

Section: Discussionmentioning

confidence: 99%

“…These studies have found that volumetric defects, sub-grains in the cellular structure, and the melt pool boundaries present in selective laser melted (SLMed) 316L-SS act as potential trapping sites for H atoms. Moreover, the stain fields around the edge dislocations work as reversible H-trapping sites (with activation energy less than 60 kJ/mol), which promotes the HE susceptibility [ 21 , 25 ]. Nevertheless, the HE resistance of 316L-SS produced by the LPBF technique is better than its counterparts produced by conventional methods due to the enhanced strength originating from the existing sub-grains in the cellular structures as well as the austenite being more stable in the LPBF specimens [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Wall Thickness Variation on Hydrogen Embrittlement Susceptibility of Additively Manufactured 316L Stainless Steel with Lattice Auxetic Structures

et al. 2023

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In the present study, the hydrogen embrittlement (HE) susceptibility of an additively manufactured (AM) 316L stainless steel (SS) was investigated. The materials were fabricated in the form of a lattice auxetic structure with three different strut thicknesses, 0.6, 1, and 1.4 mm, by the laser powder bed fusion technique at a volumetric energy of 70 J·mm−3. The effect of H charging on the strength and ductility of the lattice structures was evaluated by conducting tensile testing of the H-charged specimens at a slow strain rate of 4 × 10−5 s−1. Hydrogen was introduced to the specimens via electrochemical charging in an NaOH aqueous solution for 24 h at 80 °C before the tensile testing. The microstructure evolution of the H-charged materials was studied using the electron backscattered diffraction (EBSD) technique. The study revealed that the auxetic structures of the AM 316L-SS exhibited a slight reduction in mechanical properties after H charging. The tensile strength was slightly decreased regardless of the thickness. However, the ductility was significantly reduced with increasing thickness. For instance, the strength and uniform elongation of the auxetic structure of the 0.6 mm thick strut were 340 MPa and 17.4% before H charging, and 320 MPa and 16.7% after H charging, respectively. The corresponding values of the counterpart’s 1.4 mm thick strut were 550 MPa and 29% before H charging, and 523 MPa and 23.9% after H charging, respectively. The fractography of the fracture surfaces showed the impact of H charging, as cleavage fracture was a striking feature in H-charged materials. Furthermore, the mechanical twins were enhanced during tensile straining of the H-charged high-thickness material.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Wall Thickness Variation on Hydrogen Embrittlement Susceptibility of Additively Manufactured 316L Stainless Steel with Lattice Auxetic Structures

et al. 2023

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“…[6,8,9,[26][27][28][29][30][31][32][33][34][35][36]. (b) Tensile RRA of notched specimens for X70 and X80 steels data from [7][8][9]37,38]. (c) Relative notched ultimate tensile strength for X70 and X80 steels data from [7][8][9]37,38].…”

Section: Tensile Testsmentioning

confidence: 99%

“…(b) Tensile RRA of notched specimens for X70 and X80 steels data from [7][8][9]37,38]. (c) Relative notched ultimate tensile strength for X70 and X80 steels data from [7][8][9]37,38]. (d) Relative fracture toughness (K) for X52 and X80 steels data from [39][40][41][42][43][44][45].…”

Section: Tensile Testsmentioning

confidence: 99%

Effect of Hydrogen in Mixed Gases on the Mechanical Properties of Steels—Theoretical Background and Review of Test Results

Michler

Elsässer

Wackermann

et al. 2021

Metals

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This review summarizes the thermodynamics of hydrogen (H2) in mixed gases of nitrogen (N2), methane (CH4) and natural gas, with a special focus on hydrogen fugacity. A compilation and interpretation of literature results for mechanical properties of steels as a function of hydrogen fugacity implies that test results obtained in gas mixtures and in pure hydrogen, both at the same fugacity, are equivalent. However, this needs to be verified experimentally. Among the test methods reviewed here, fatigue crack growth testing is the most sensitive method to measure hydrogen effects in pipeline steels followed by fracture toughness testing and tensile testing.

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“…Moreover, SLM 304L also had a lower apparent hydrogen diffusivity at room temperature compared to wrought 304L which was attributed to the entangled dislocations [28], whereas the hydrogen solubility of SLM 304L was comparable to cast and annealed 304L ASS in [26].…”

Section: Introductionmentioning

confidence: 97%

Effect of additive manufacturing and subsequent heat and/or surface treatment on the hydrogen embrittlement sensitivity of 316L austenitic stainless steel

Claeys

Deconinck

Verbeken

et al. 2023

International Journal of Hydrogen Energy

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The dependence of hydrogen embrittlement on hydrogen transport in selective laser melted 304L stainless steel

Cited by 28 publications

References 56 publications

Effects of Wall Thickness Variation on Hydrogen Embrittlement Susceptibility of Additively Manufactured 316L Stainless Steel with Lattice Auxetic Structures

Effects of Wall Thickness Variation on Hydrogen Embrittlement Susceptibility of Additively Manufactured 316L Stainless Steel with Lattice Auxetic Structures

Effect of Hydrogen in Mixed Gases on the Mechanical Properties of Steels—Theoretical Background and Review of Test Results

Effect of additive manufacturing and subsequent heat and/or surface treatment on the hydrogen embrittlement sensitivity of 316L austenitic stainless steel

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