Journal ArticleDOI
Hydrogen-enhanced localized plasticity—a mechanism for hydrogen-related fracture
Reads0
Chats0
TLDR
In this article, a theory of hydrogen shielding of the interaction of dislocations with elastic stress centres is outlined, which can account for the observed hydrogen-enhanced dislocation mobility.Abstract:
The mechanisms of hydrogen-related fracture are briefly reviewed and a few evaluative statements are made about the stress-induced hydride formation, decohesion, and hydrogen-enhanced localized plasticity mechanisms. A more complete discussion of the failure mechanism based on hydrogen-enhanced dislocation mobility is presented, and these observations are related to measurements of the macroscopic flow stress. The effects of hydrogen-induced slip localization on the measured flow stress is discussed. A theory of hydrogen shielding of the interaction of dislocations with elastic stress centres is outlined. It is shown that this shielding effect can account for the observed hydrogen-enhanced dislocation mobility.read more
Citations
More filters
Journal ArticleDOI
Straining-temperature dependence of vacancy behavior in hydrogen-charged austenitic stainless steel 316L
Akari Komatsu,Masanori Fujinami,Masaharu Hatano,Kazuhisa Matsumoto,Mitsuki Sugeoi,Luca Chiari +5 more
TL;DR: In this paper, the vacancy behavior in austenitic stainless steel 316L with high γ-phase stability in a hydrogen environment was investigated to clarify the critical defects of hydrogen embrittlement.
Journal ArticleDOI
Dependence of blistering and deuterium retention on damage depth in damaged tungsten exposed to deuterium plasma
Shiwei Wang,Wangguo Guo,Long Cheng,Thomas Schwarz-Selinger,Mi Liu,Xiu-Li Zhu,Yue Yuan,Engang Fu,Guang-Hong Lu +8 more
TL;DR: In this paper, the effect of different damage depths on blistering and deuterium retention has been investigated in heavy-ion-damaged tungsten (W) with exposure to D plasma (40 eV, 1 × 1022 ions m−2 s−1) at 550 K.
Journal ArticleDOI
Evaluation of hydrogen diffusion and trapping in nickel Alloy 625 by thermal desorption spectroscopy
TL;DR: In this article , the authors present hydrogen diffusion and trapping in the nickel Alloy 625 by employing the hot extraction test and the thermal desorption spectroscopy (TDS) analysis.
Journal ArticleDOI
Synthesis of β-Ti-Nb alloys from elemental powders by high-energy ball milling and their hydrogenation features
R.A. de Araujo-Silva,A.M. Neves,L.E.R. Vega,Maria Regina Martins Triques,Daniel Rodrigo Leiva,C.S. Kiminami,Tomaz Toshimi Ishikawa,A.M. Jorge Junior,Walter José Botta +8 more
TL;DR: In this article, different compositions with Ti/Nb atomic ratios of 1.0, 1.5 and 2.3 were prepared by mechanical alloying (MA) and reactive milling (RM), and the composition effects on the microstructure and the hydrogenation properties were characterized.
Hydrogen assisted cracking and transport studied by ToF-SIMS and data fusion with HR-SEM
TL;DR: In this article, secondary ion mass spectrometry (SIMS) was adopted as the main tool to detect and locally map the hydrogen distribution in two types of duplex stainless steel grades.
References
More filters
Journal ArticleDOI
Embedded-atom method: Derivation and application to impurities, surfaces, and other defects in metals
Murray S. Daw,Michael I. Baskes +1 more
TL;DR: In this paper, the authors derived an expression for the total energy of a metal using the embedding energy from which they obtained several ground-state properties, such as the lattice constant, elastic constants, sublimation energy, and vacancy-formation energy.
Journal ArticleDOI
A new model for hydrogen-assisted cracking (hydrogen “embrittlement”)
TL;DR: A new model for hydrogen-assisted cracking is presented in this article, which explains the observations of decreasing microscopic plasticity and changes of fracture modes with decreasing stress intensities at crack tips during stress-corrosion cracking and HAC of quenched-and tempered steels.
Journal ArticleDOI
Equilibrium aspects of hydrogen-induced cracking of steels
R.A. Oriani,P.H. Josephic +1 more
TL;DR: In this paper, the threshold pressures, p ∗, of hydrogen and of deuterium gases necessary to cause crack propagation in AISI 4340 steel of 250 ksi yield strength, were determined as functions of plane-strain stress intensity factor K at room temperature.
Journal ArticleDOI
A theory of the fracture of metals
TL;DR: In this paper, a theory of the fracture of metals is presented, which is based on the theory of fracture theory of metal fracture, and it is proved that the theory is correct.
Journal ArticleDOI
Hydrogen embrittlement of α titanium: In situ tem studies
TL;DR: In this paper, the effect of hydrogen on fracture in the h.c.p. α Ti-4 wt % Al alloy and the role of titanium hydride in the fracture process have been studied by deforming samples in situ in a highvoltage electron microscope equipped with an environmental cell.