Predicting Tritium and Decay Helium Effects on Burst Properties of Pressure Vessels

Lam, Poh-Sang; Morgan, Michael M.; Imrich, K.J.; Chapman, G. K.

doi:10.1115/pvp2006-icpvt-11-93274

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…The raw data of load and crosshead deflection were analyzed using a technique to compensate for machine compliance and slippage in the grip section. The procedure for this correction is described in a study by Lam et al 4 . Engineering stress and strain were calculated and plotted in the results and discussion.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Testing of Carbon Steel in High Pressure Hydrogen

Duncan¹

2006

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Section: Methodsmentioning

confidence: 99%

Mechanical Testing of Carbon Steel in High Pressure Hydrogen

Duncan¹

2006

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“…9) of the vessels burst with deuterium gas failed by quasi-cleavage which was different than the dimpled rupture fracture modes observed in the vessels burst hydraulically. A materials system model and finite element procedure were developed in a earlier study (7) to predict burst pressure and the vessel volume change (ductility) during burst testing. The model was used to predict changes in burst pressure and ductility from the hydrogen or tritium service history, known values of hydrogen isotope diffusivity, and published data on the effects of hydrogen, tritium, and helium on the tensile properties of stainless steel.…”

Section: Discussionmentioning

confidence: 99%

Hydrogen Effects on the Burst Properties of Type 304L Stainless Steel Flawed Vessels

Morgan

Hall

Lam

et al. 2008

Volume 6: Materials and Fabrication, Parts a and B

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The effect of hydrogen on the burst properties Type 304L stainless steel vessels was investigated. The purpose of the study was to compare the burst properties of hydrogen-exposed stainless steel vessels burst with different media: water, helium gas, or deuterium gas. A second purpose of the tests was to provide data for the development of a predictive finite-element model. The burst tests were conducted on hydrogen-exposed and unexposed axially-flawed cylindrical vessels. The results indicate that samples burst pneumatically had lower volume ductility than those tested hydraulically. Deuterium gas tests had slightly lower ductility than helium gas tests. Burst pressures were not affected by burst media. Hydrogen-charged samples had lower volume ductility and slightly higher burst pressures than uncharged samples. Samples burst with deuterium gas fractured by quasi-cleavage near the inside wall. The results of the tests were used to improve a previously developed predictive finite-element model. The results show that predicting burst behavior requires as a material input the effect of hydrogen on the plastic strain to fracture from tensile tests. The burst test model shows that a reduction in the plastic strain to fracture of the material will result in lower volume ductility without a reduction in burst pressure which is in agreement with the burst results.

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“…The raw data of load and crosshead deflection were analyzed using a technique to compensate for machine compliance and slippage in the grip section. The procedure for this correction is described in a study by Lam et al 12 . Engineering stress and strain were calculated and 0.2% Yield stress, ultimate tensile strength and ductility at failure were determined from the stress strain curves.…”

Section: Figure 3: Schematic and Dimensions Of Dog Bone Tensile Specimenmentioning

confidence: 99%

Tensile Testing of Carbon Steel in High Pressure Hydrogen

Duncan

Lam

Adams

2007

Volume 6: Materials and Fabrication

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An infrastructure of new and existing pipelines and systems will be required to carry and to deliver hydrogen as an alternative energy source under the hydrogen economy. Carbon and low alloy steels of moderate strength are currently used in hydrogen delivery systems as well as in the existing natural gas systems. It is critical to understand the material response of these standard pipeline materials when they are subjected to pressurized hydrogen environments. The methods and results from a testing program to quantify hydrogen effects on mechanical properties of carbon steel pipeline and pipeline weld materials are provided. Tensile properties of one type of steel (A106 Grade B) in base metal, welded and heat affected zone conditions were tested at room temperature in air and high pressure (10.34 MPa or 1500 psig) hydrogen. A general reduction in the materials ability to plastically deform was noted in this material when specimens were tested in hydrogen. Furthermore, the primary mode of fracture was changed from ductile rupture in air to cleavage with secondary tearing in hydrogen. The mechanical test results will be applied in future analyses to evaluate service life of the pipelines. The results are also envisioned to be part of the bases for construction codes and structural integrity demonstrations for hydrogen service pipeline and vessels..

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Predicting Tritium and Decay Helium Effects on Burst Properties of Pressure Vessels

Cited by 6 publications

References 3 publications

Mechanical Testing of Carbon Steel in High Pressure Hydrogen

Mechanical Testing of Carbon Steel in High Pressure Hydrogen

Hydrogen Effects on the Burst Properties of Type 304L Stainless Steel Flawed Vessels

Tensile Testing of Carbon Steel in High Pressure Hydrogen

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