Atom probe tomography observation of hydrogen in high-Mn steel and silver charged via an electrolytic route

Haley, Daniel; Merzlikin, Sergiy Vasil ́ović; Choi, Pyuck‐Pa; Raabe, Dierk

doi:10.1016/j.ijhydene.2014.05.169

Cited by 59 publications

(62 citation statements)

References 33 publications

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“…This, however, is usually limited to voltage-mode experiments, as the laser causes complex molecular species, such as ionised molecules of ð 1 HÞ 2 to form. Deuterium studies have been undertaken by several authors [59,64,90,156,204,208], often involving modifications to standard APT systems for introducing hydrogen into samples. These studies have shown that it is possible to image hydrogen within a range of materials; however, the APT is typically limited to only showing localised concentrations on the order of 20 at.…”

Section: Experimental Techniques To Detect Hydrogen In Metalsmentioning

confidence: 99%

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

et al. 2018

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Hydrogen embrittlement is a complex phenomenon, involving several lengthand timescales, that affects a large class of metals. It can significantly reduce the ductility and load-bearing capacity and cause cracking and catastrophic brittle failures at stresses below the yield stress of susceptible materials. Despite a large research effort in attempting to understand the mechanisms of failure and in developing potential mitigating solutions, hydrogen embrittlement mechanisms are still not completely understood. There are controversial opinions in the literature regarding the underlying mechanisms and related experimental evidence supporting each of these theories. The aim of this paper is to provide a detailed review up to the current state of the art on the effect of hydrogen on the degradation of metals, with a particular focus on steels. Here, we describe the effect of hydrogen in steels from the atomistic to the continuum scale by reporting theoretical evidence supported by quantum calculation and modern experimental characterisation methods, macroscopic effects that influence the mechanical properties of steels and established damaging mechanisms for the embrittlement of steels. Furthermore, we give an insight into current approaches and new mitigation strategies used to design new steels resistant to hydrogen embrittlement.

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Section: Experimental Techniques To Detect Hydrogen In Metalsmentioning

confidence: 99%

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

et al. 2018

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“…However, the low solubility of deuterium within both ferrite and austenite (34) should achieve a higher deuterium content (31). In recent work using this approach no spatial data was shown for steel samples primarily due to diffusion losses.…”

Section: Articlementioning

confidence: 99%

“…Charging was conducted using a 0.1 M NaOH in H 2 O (H as either 1 H, or 2 H for protiated or deuterated experiments respectively), at 2.2 V for 30 s, using an apparatus similar to that in previous works (31). A Keithley 487 pico-ammeter/voltage source was used for power supply and current measurement, and a small camera was used to ensure that samples were inserted into the solution.…”

Section: Articlementioning

confidence: 99%

Direct observation of individual hydrogen atoms at trapping sites in a ferritic steel

Chen

Haley

Gerstl

et al. 2017

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“…These local compositions match the Z-contrast observations in the STEM-HAADF image, Figure 2a. [43][44][45][46] The important feature of an APT is that it is a spectrometric technique using a microchannel plate (MCP) for detecting ions and measuring their mass-to-charge state ratios (m/n), essentially one ion at a time. The composition of the dark layers was found to be similar to that at the intercolumnar grain boundaries.…”

Section: Tem and Cs-corrected Stem Microstructural And Crystallographmentioning

confidence: 99%

Atomic‐Scale Structural and Chemical Study of Columnar and Multilayer Re–Ni Electrodeposited Thermal Barrier Coating

et al. 2016

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Rhenium alloys exhibit a unique combination of chemical, physical, and mechanical properties that makes them attractive for a variety of applications. Herein, we present atomic-scale structural and atomic part-per-million level three-dimensional (3D) chemical characterization of a Re-Ni coating, combining aberration-corrected scanning transmission electron microscopy (STEM) and atom-probe tomography (APT). A unique combination of a columnar and multilayer structure is formed by singlebath dc-electroplating and is reported here for the first time. Alternating thicker Re-rich and thinner Ni-rich layers support a mechanism in which Ni acts as a reducing agent. The multilayers exhibit hetero-epitaxial growth resulting in high residual shear stresses that lead to formation of corrugated interfaces and an outer layer with mud-cracks. IntroductionRhenium (Re) is a refractory metal with a unique combination of chemical, physical, and mechanical properties that makes it attractive for high-temperature, catalytic, energy, electrical, biomedical, and other applications, in spite of its high cost. [1,2] Interest in electroless deposition [3,4] and electrodeposition [5][6][7][8][9][10][11][12][13][14][15][16] of Re and its alloys has recently emerged. Electroplating of pure Re yields poor deposition results. The addition of salts of the iron-group metals (Ni, Fe, and Co) to the plating bath improves, however, the coating dramatically, allowing deposition of thick layers of the

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Atom probe tomography observation of hydrogen in high-Mn steel and silver charged via an electrolytic route

Cited by 59 publications

References 33 publications

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

Direct observation of individual hydrogen atoms at trapping sites in a ferritic steel

Atomic‐Scale Structural and Chemical Study of Columnar and Multilayer Re–Ni Electrodeposited Thermal Barrier Coating

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