Hydride Phases in Austenitic Stainless Steels

Szummer, A.; Janko, A.

doi:10.5006/0010-9312-35.10.461

Cited by 74 publications

(26 citation statements)

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“…Takai et al [207] showed that the hydrogen adsorption capacity in ferrite is increased due to the hydrogen-enhanced production of strain-induced vacancies and dislocations. However, during annealing at 200 C, these defects were almost entirely annihilated, indicating that these were primarily vacancies. Models Figure 9 Schematic of macro-and micromechanism [147].…”

Section: Mesoscopic and Continuum Modelsmentioning

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: Mesoscopic and Continuum Modelsmentioning

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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“…In numerous studies, the formation of hcp -martensite in 304-and 310-type austenitic stainless steels was observed as a result of hydrogen charging [3][4][5][6][7][8]. It was also reported that bcc ␣-martensite is formed during the outgassing of hydrogen from 304 stainless steel, whereas no ␣-martensite was detected in 310 stainless steel [7].…”

Section: Introductionmentioning

confidence: 97%

“…X-ray diffraction studies on cathodically hydrogen-charged austenitic stainless steels have been performed to investigate possible phase transformations due to hydrogen loading [1][2][3][4][5][6][7][8][9][10]. The austenitic stainless steels of AISI type 304 (composition close to Fe/Cr18/Ni10) and AISI type 310 (composition close to Fe/Cr25/Ni20) have been studied most extensively in this context.…”

Section: Introductionmentioning

confidence: 99%

Effects of high-pressure hydrogen charging on the structure of austenitic stainless steels

Hoelzel

Danilkin²,

Ehrenberg

et al. 2004

Materials Science and Engineering: A

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“…Over the last fifty years, materials scientists have spent many efforts to find a unique mechanism of HE. As a result of these efforts, three main competing models of HE were proposed: decohesion (e.g., [2]), hydride formation (e.g., [3]) and hydrogen-enhanced local plasticity (HELP) [4].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

Shyvaniuk¹

2016

Metallofiz. Noveishie Tekhnol.

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Annealed and tensile prestrained 316L-type stainless steel is studied by internal friction (IF) method. Low-frequency forced-vibration measurements of IF are carried out in the temperature range of 130-500 K before and after gaseous-hydrogen charging at 543 K and under three different pressures: 0.5, 10, and 100 MPa. Two complex multicomponent IF peaks at about 250 and 365 K are detected after preliminary tensile deformation in hydrogenfree material. As revealed, the low-temperature peak is of relaxation type, and the high-temperature one is a resonant peak. The effect of hydrogen content and hydrogen distribution on IF peaks' features, e.g., background, amplitude and thermal stability, is examined. An increase in stability of vacancies caused by hydrogen is suggested that follows from IF measurements after ageing at 473 K. As experimentally shown, the temperature drop of hydrogenation to 358 K leads to a marked shift of the high-temperature peak toward higher temperatures. A hypothesis about the cause underlying this phenomenon is proposed.За допомогою механічної спектроскопії, а саме, міряння внутрішнього тертя, досліджено неіржавійну сталь типу 316L у відпаленому та дефор-мованому розтягом станах. Низькочастотні міряння внутрішнього тертя на вимушених коливаннях проводилися в температурному діапазоні від 130 до 500 К перед і після газового наводнювання при 543 К та трьох зна-ченнях тиску водню: 0,5, 10 та 100 МПа. Після деформації розтягом у ви-хідному матеріалі виявлено два мультикомпонентних піки при темпера-турах біля 250 та 365 К. Показано, що низькотемпературний пік має ре-лаксаційну природу, в той час як високотемпературний пік відноситься до резонансних. Також було перевірено вплив вмісту водню та його розпо-ділу на властивості піків внутрішнього тертя, а саме, на їх фон, амплітуду та термічну стабільність. Сформульовано припущення про те, що водень сприяє стабілізації вакансій, що випливає із експериментальних дослі-джень наводненої та зістареної при 473 К сталі. Експериментально пока-зано, що зниження температури наводнювання до 358 К призводить до С помощью механической спектроскопии, а именно, измерения внутрен-него трения, исследована нержавеющая сталь типа 316L в отожжённом и деформированном растяжением состояниях. Низкочастотные измерения внутреннего трения на вынужденных колебаниях проведены в темпера-турном диапазоне от 130 до 500 К до и после газового наводороживания при 543 К и трёх значениях давления водорода: 0,5, 10 и 100 МПа. После деформации растяжением в исходном состоянии обнаружены два муль-тикомпонентных пика при температурах около 250 и 365 К. Показано, что низкотемпературный пик имеет релаксационную природу, в то время как высокотемпературный пик относится к резонансным. Также прове-рено влияние содержания водорода и его распределения на свойства пи-ков внутреннего трения, а именно, на их фон, амплитуду и термическую стабильность. Сформулировано предположение о том, что водород способ-ствует стабилизации вакансий, что следует из экспериментальных иссле-дований наводороженной и сос...

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Hydride Phases in Austenitic Stainless Steels

Cited by 74 publications

References 0 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

Effects of high-pressure hydrogen charging on the structure of austenitic stainless steels

Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

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