Effects of alloy composition and strain hardening on tensile fracture of hydrogen-precharged type 316 stainless steels

Marchi, Chris San; Somerday, Brian P.; Tang, Xuan; Schiroky, G. H.

doi:10.1016/j.ijhydene.2007.10.046

Cited by 226 publications

(47 citation statements)

References 48 publications

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“…[54] It has been reported that hydrogen charging increases static flow stress. [27,[33][34][35] Figure 12 shows also the increase in Vickers hardness measured at a 9.8-N load with increasing hydrogen content. However, the effect of hydrogen on the cyclic yield stress in terms of hydrogen content is not simple, particularly at low hydrogen content as for the case of fatigue life (Figures 6 and 7).…”

Section: Two Aspects Of Hydrogen-dislocation Interaction: the Hardmentioning

confidence: 99%

“…However, hydrogen effects are not necessarily limited to the enhancement of dislocation mobility, namely, to assisting crystallographic glide. There are more articles that report increased macroscopic yield strength of austenitic stainless steels due to hydrogen [27,[33][34][35] than those that report decreased yield strength. The precise studies by Kirchheim and co-workers [36,37] showed that hydrogen has two contradictory effects, i.e., both resisting and enhancing dislocation motion.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Effect against Hydrogen Embrittlement

Murakami

Kanezaki

Mine

2010

Metall Mater Trans A

191

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The well-known term ''hydrogen embrittlement'' (HE) expresses undesirable effects due to hydrogen such as loss of ductility, decreased fracture toughness, and degradation of fatigue properties of metals. However, this article shows, surprisingly, that hydrogen can have an effect against HE. A dramatic phenomenon was found in which charging a supersaturated level of hydrogen into specimens of austenitic stainless steels of types 304 and 316L drastically improved the fatigue crack growth resistance, rather than accelerating fatigue crack growth rates. Although this mysterious phenomenon has not previously been observed in the history of HE research, its mechanism can be understood as an interaction between hydrogen and dislocations. Hydrogen can play two roles in terms of dislocation mobility: pinning (or dragging) and enhancement of mobility. Competition between these two roles determines whether the resulting phenomenon is damaging or, unexpectedly, desirable. This finding will, not only be the crucial key factor to elucidate the mechanism of HE, but also be a trigger to review all existing theories on HE in which hydrogen is regarded as a dangerous culprit.

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Section: Two Aspects Of Hydrogen-dislocation Interaction: the Hardmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen Effect against Hydrogen Embrittlement

Murakami

Kanezaki

Mine

2010

Metall Mater Trans A

191

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“…Il est par ailleurs notable que, même dans des alliages à faible énergie de faute (aciers inoxydables austénitiques par exemple), la présence d'hydrogène en solution de traduit par une localisation accrue du glissement. De nombreuses observations qualitatives de ce phénomène ont été publiées [24,25]. Elles sont aujourd'hui complétées par des études plus quantitatives associées à des modélisations…”

Section: Discussionunclassified

Couplage hydrogène - plasticité dans les matériaux cubiques à faces centrées

Delafosse

2009

PlastOx 2007 - Mécanismes Et Mécanique Des Interactions Plasticité - Environnement

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Résumé. Les interactions entre hydrogène en solution solide et plasticité sont étudiées et modélisées du point de vue de la métallurgie physique et de la théorie élastique des défauts discrets dans les cristaux cubiques à faces centrées. Des essais de vieillissement statique permettent d'évaluer quantitativement l'interaction élastique entre dislocations mobiles et atmosphères de solutés dans le nickel et dans un alliage binaire nickel-chrome. Les principes du couplage élastique entre solutés et dislocations sont rappelés et la notion d'indice d'écrantage des interactions de paires est introduite. Cette notion permet d'évaluer les effets de l'hydrogène sur l'énergie de ligne des dislocations, la tension de ligne, la contrainte critique d'activation de sources de Franck-Read, la stabilité des jonctions et la distance de séparation entre partielles qui gouverne le glissement dévié. Des essais de traction sur des monocristaux orientés pour le glissement simple permet d'évaluer les effets macroscopiques du couplage hydrogène -plasticité. L'observation par microscopie électronique à transmission des structures de déformation permet de mettre en évidence le glissement dévié comme étant le mécanisme élémentaire de plasticité le plus fortement affecté par la présence d'hydrogène en solution. Ces résultats sont discutés sous l'angle des mécanismes de rupture par effets de l'hydrogène.

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“…8,11,[16][17][18][19][20][21] The IRHE of stable austenitic stainless steels, in which no strain-induced α' martensitic transformation occurs during deformation, can be attributed to the low stacking-fault energy of the steels, which inhibits the occurrence of cross slips and induces slip planarity. 22,23) Metastable austenitic stainless steels such as type 301, 304 and 316 stainless steels exhibit IRHE [5][6][7][8][9][10][11][12]15,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] as well as HGE 8,9,11,[16][17][18][19][20][21][39][40][41][42][43][44]…”

Section: Introductionmentioning

confidence: 99%

“…22,23) Metastable austenitic stainless steels such as type 301, 304 and 316 stainless steels exhibit IRHE [5][6][7][8][9][10][11][12]15,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] as well as HGE 8,9,11,[16][17][18][19][20][21][39][40][41][42][43][44][45][46][47][48][49][50][51][52] due to the presence of straininduced α' martensite. 8,9,16,…”

Section: Introductionmentioning

confidence: 99%

Internal Reversible Hydrogen Embrittlement of Austenitic Stainless Steels Based on Type 316 at Low Temperatures

Zhang

Imade

et al. 2012

ISIJ Int.

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The internal reversible hydrogen embrittlement (IRHE) of austenitic Fe(10-20)Ni17Cr2Mo alloys based on type 316 stainless steels hydrogen-charged to around 40 mass ppm was investigated by performing tensile tests using the slow strain rate technique at temperatures from 80 to 300 K. The susceptibility to IRHE depended on the Ni content. IRHE occurred below a Ni content of 15% (Ni equivalent of 29%), increased with decreasing temperature, reached a maximum at 200 K and decreased with further decreasing temperature. Hydrogen-induced fracture due to IRHE occurred in brittle transgranular mode associated with the strain-induced α' martensite structure at temperatures from 200 to 300 K and occurred simultaneously with fracture along the prior annealed-twin boundary at 200 and 250 K, then changed to dimple rupture mode due to hydrogen localization at 150 K. IRHE was controlled by the amount of strain-induced α' martensite above 200 K, whereas it was controlled by hydrogen diffusion below 200 K.KEY WORDS: stainless steel; hydrogen embrittlement; nickel; low temperature deformation; slow strain rate technique.

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Effects of alloy composition and strain hardening on tensile fracture of hydrogen-precharged type 316 stainless steels

Cited by 226 publications

References 48 publications

Hydrogen Effect against Hydrogen Embrittlement

Hydrogen Effect against Hydrogen Embrittlement

Couplage hydrogène - plasticité dans les matériaux cubiques à faces centrées

Internal Reversible Hydrogen Embrittlement of Austenitic Stainless Steels Based on Type 316 at Low Temperatures

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