title: An in situ tensile test apparatus for polymers in high pressure hydrogen.
abstract: Degradation of material properties by high-pressure hydrogen is an important factor in determining the safety and reliability of materials used in high-pressure hydrogen storage and delivery. Hydrogen damage mechanisms have a time dependence that is linked to hydrogen outgassing after exposure to the hydrogen atmosphere that makes ex situ measurements of mechanical properties problematic. Designing in situ measurement instruments for high-pressure hydrogen is challenging due to known hydrogen incompatibility with many metals and standard high-power motor materials such as Nd. Here we detail the design and operation of a solenoid based in situ tensile tester under high-pressure hydrogen environments up to 42 MPa (6000 psi). Modulus data from high-density polyethylene samples tested under high-pressure hydrogen at 35 MPa (5000 psi) are also reported as compared to baseline measurements taken in air.
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: Alvine
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Kafentzis
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: S G
authors.initials: SG
authors.lastname: Pitman
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: K I
authors.initials: KI
authors.lastname: Johnson
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: D
authors.initials: D
authors.lastname: Skorski
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Tucker
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Roosendaal
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Dahl