Hydrogen diffusivity measurement and microstructural characterization of Custom 465 stainless steel

S. Ifergane; E. Sabatani; B. Carmeli; Z. Barkay; V. Ezersky; O. Beeri; N. Eliaz

doi:10.1016/j.electacta.2015.08.016

Hydrogen diffusivity measurement and microstructural characterization of Custom 465 stainless steel

S. Ifergane, E. Sabatani, B. Carmeli, Z. Barkay, V. Ezersky, O. Beeri, N. Eliaz

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Hydrogen diffusivity in Custom 465^® martensitic precipitation hardened stainless steel is determined using electrochemical permeation tests. Hydrogen diffusivity in the solution annealed (SA) condition is approximately 10 times higher than in the aged H900 (480 °C, 4 h) condition because of hydrogen traps such as Ni₃Ti nano-precipitates and reverted austenite. The microstructure of the alloy is characterized by TEM, XRD and ESEM/EBSD, both in the aged H900 and in the SA conditions. In the aged condition, η-Ni₃Ti nano-precipitates with hexagonal structure and a rod-like shape are observed. In addition, reverted austenite is found at grain boundaries and inter-lath interfaces. In the SA condition, these microstructural features are not evident, which may explain the higher diffusivity measured. The diffusivity is almost unaffected by prior microplastic deformation of H900.

Original language	English
Article number	25484
Pages (from-to)	494-503
Number of pages	10
Journal	Electrochimica Acta
Volume	178
DOIs	https://doi.org/10.1016/j.electacta.2015.08.016
State	Published - 1 Oct 2015

Keywords

Custom 465
Effects of strain
Hydrogen diffusion
Hydrogen permeation
Precipitation hardening stainless steel

ASJC Scopus subject areas

General Chemical Engineering
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.electacta.2015.08.016

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title = "Hydrogen diffusivity measurement and microstructural characterization of Custom 465 stainless steel",

abstract = "Hydrogen diffusivity in Custom 465{\textregistered} martensitic precipitation hardened stainless steel is determined using electrochemical permeation tests. Hydrogen diffusivity in the solution annealed (SA) condition is approximately 10 times higher than in the aged H900 (480 °C, 4 h) condition because of hydrogen traps such as Ni3Ti nano-precipitates and reverted austenite. The microstructure of the alloy is characterized by TEM, XRD and ESEM/EBSD, both in the aged H900 and in the SA conditions. In the aged condition, η-Ni3Ti nano-precipitates with hexagonal structure and a rod-like shape are observed. In addition, reverted austenite is found at grain boundaries and inter-lath interfaces. In the SA condition, these microstructural features are not evident, which may explain the higher diffusivity measured. The diffusivity is almost unaffected by prior microplastic deformation of H900.",

keywords = "Custom 465, Effects of strain, Hydrogen diffusion, Hydrogen permeation, Precipitation hardening stainless steel",

author = "S. Ifergane and E. Sabatani and B. Carmeli and Z. Barkay and V. Ezersky and O. Beeri and N. Eliaz",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

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doi = "10.1016/j.electacta.2015.08.016",

language = "English",

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TY - JOUR

T1 - Hydrogen diffusivity measurement and microstructural characterization of Custom 465 stainless steel

AU - Ifergane, S.

AU - Sabatani, E.

AU - Carmeli, B.

AU - Barkay, Z.

AU - Ezersky, V.

AU - Beeri, O.

AU - Eliaz, N.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Hydrogen diffusivity in Custom 465® martensitic precipitation hardened stainless steel is determined using electrochemical permeation tests. Hydrogen diffusivity in the solution annealed (SA) condition is approximately 10 times higher than in the aged H900 (480 °C, 4 h) condition because of hydrogen traps such as Ni3Ti nano-precipitates and reverted austenite. The microstructure of the alloy is characterized by TEM, XRD and ESEM/EBSD, both in the aged H900 and in the SA conditions. In the aged condition, η-Ni3Ti nano-precipitates with hexagonal structure and a rod-like shape are observed. In addition, reverted austenite is found at grain boundaries and inter-lath interfaces. In the SA condition, these microstructural features are not evident, which may explain the higher diffusivity measured. The diffusivity is almost unaffected by prior microplastic deformation of H900.

AB - Hydrogen diffusivity in Custom 465® martensitic precipitation hardened stainless steel is determined using electrochemical permeation tests. Hydrogen diffusivity in the solution annealed (SA) condition is approximately 10 times higher than in the aged H900 (480 °C, 4 h) condition because of hydrogen traps such as Ni3Ti nano-precipitates and reverted austenite. The microstructure of the alloy is characterized by TEM, XRD and ESEM/EBSD, both in the aged H900 and in the SA conditions. In the aged condition, η-Ni3Ti nano-precipitates with hexagonal structure and a rod-like shape are observed. In addition, reverted austenite is found at grain boundaries and inter-lath interfaces. In the SA condition, these microstructural features are not evident, which may explain the higher diffusivity measured. The diffusivity is almost unaffected by prior microplastic deformation of H900.

KW - Custom 465

KW - Effects of strain

KW - Hydrogen diffusion

KW - Hydrogen permeation

KW - Precipitation hardening stainless steel

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U2 - 10.1016/j.electacta.2015.08.016

DO - 10.1016/j.electacta.2015.08.016

M3 - Article

AN - SCOPUS:84939833184

SN - 0013-4686

VL - 178

SP - 494

EP - 503

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 25484

ER -

Hydrogen diffusivity measurement and microstructural characterization of Custom 465 stainless steel

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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