Browsing NTNU Open by Author "Hajilou, Tarlan"
Now showing items 1-16 of 16
-
3D-Focused ion beam tomography and quantitative porosity evaluation of ZrO2-SiO2 composite coating; amorphous SiO2 as a porosity tailoring agent
Farhadian, M.; Raeissi, K.; Golozar, M.A.; Labbaf, S.; Hajilou, Tarlan; Barnoush, Afrooz (Peer reviewed; Journal article, 2020)The current study is focused on refining effect of amorphous SiO2 on porosity and interlayer formation of sintered ZrO2-SiO2 composite coatings produced on anodic oxidized 316L substrate. The SiO2 improved particle interaction ... -
Advanced small-scale characterization of hydrogen embrittlement
Fagerkind, Roar Andre (Master thesis, 2016)A large amount of micro-cantilevers were made using a focused ion beam (FIB) microscope. The cantilevers were made to be tested under cyclic loading in a triboindenter to determine the hydrogen effect on the grain boundaries ... -
Advanced small-scale characterization of hydrogen embrittlement in nickel and nickel alloys
Fossheim, Sondre (Master thesis, 2018)The demand for high strength materials is increasing in the modern industrial development. With more challenging applications and extreme environments, it is essential that materials are able to meet capacity and safety ... -
Antagonist softening and hardening effects of hydrogen investigated using nanoindentation on cyclically pre-strained nickel single crystal
Hachet, Guillaume; Oudriss, A; Barnoush, Afrooz; Hajilou, Tarlan; Wang, Dong; Metsue, A; Feaugas, X (Peer reviewed; Journal article, 2020)Since hydrogen-plasticity interaction is a key feature in the study of hydrogen embrittlement, a series of nanoindentation tests were carried out to evaluate the possible impact of hydrogen on the dislocation structures ... -
Assessment of the potential of hydrogen plasma charging as compared to conventional electrochemical hydrogen charging on dual phase steel.
Depover, Tom; Hajilou, Tarlan; Wan, Di; Wang, Dong; Barnoush, Afrooz; Verbeken, Kim (Journal article; Peer reviewed, 2019)The present study evaluates the hydrogen induced damage by in-situ hydrogen plasma charging in dual phase (DP) steel. Cold deformation of 15% is applied on the material to change microstructural defects, such as dislocation ... -
Electrophoretic deposition and corrosion performance of Zirconia-Silica composite coating applied on surface treated 316L stainless steel: Toward improvement of interface structure
Farhadian, Mousa; Raeissi, Keyvan; Golozar, Mohammad Ali; Labbaf, Sheyda; Hajilou, Tarlan; Barnoush, Afrooz (Peer reviewed; Journal article, 2019)ZrO2-10 mol.% SiO2 composite coatings has been produced on 316L stainless steel, surface treated using mechanical polishing, electropolishing and anodic oxidizing procedures. For this purpose, the composite particles were ... -
Evaluation of microstructural and environmental effects on the hydrogen uptake and desorption in high-strength carbon steels: A thermal desorption spectroscopy study
Karimi, Shabnam; Taji, Iman; Palencsar, Simona; Dugstad, Arne; Hajilou, Tarlan; Barnoush, Afrooz; Verbeken, Kim; Johnsen, Roy; Depover, Tom (Peer reviewed; Journal article, 2023)The hydrogen uptake in three high-strength carbon steels is studied after exposure to three different environments: an aqueous solution with CO2 bubbling, CO2/H2S bubbling, and cathodic charging without external gassing. ... -
Hydrogen embrittlement and corrosion evaluation of Alloy 725 alloyed with B and Cu
Taji, Iman (Doctoral theses at NTNU;2023:40, Doctoral thesis, 2023)The need to achieve materials with higher strength and better corrosion resistance results in producing new alloys. Nickel base alloys are among the materials which have been subjected to several studies related to producing ... -
Hydrogen Embrittlement in Fe3%Si, Visited by Nanomechanical Testing and Cohesive Zone Simulation
Olden, Vigdis; Hajilou, Tarlan; Kheradmand, Nousha; Barnoush, Afrooz; Alvaro, Antonio; Osen, Vidar (Chapter, 2016)This work is part of a multi scale computational and experimental approach in which first principle modelling, nanoscale experiments and continuum simulations are combined in order to represent hydrogen induced degradation ... -
Hydrogen-Assisted Cracking Investigated by In Situ Electrochemical Micro-Cantilever Bending Test
Hajilou, Tarlan (Doctoral theses at NTNU;2018:212, Doctoral thesis, 2018)Most high strength and high performance alloys experience a premature rupture and loss in the ductility when exposed to hydrogen. The interaction of hydrogen with dislocations and other microstructural defects such as ... -
Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope
Deng, Yun; Hajilou, Tarlan; Barnoush, Afrooz (Journal article, 2017)To evaluate the hydrogen (H)-induced embrittlement in iron aluminium intermetallics, especially the one with stoichiometric composition of 50 at.% Al, a novel in situ micro-cantilever bending test was applied within an ... -
Hydrogen-enhanced intergranular failure of sulfur-doped nickel grain boundary: In situ electrochemical micro-cantilever bending vs. DFT
Hajilou, Tarlan; Taji, Iman; Christien, Frédéric; He, Shuang; Scheiber, Daniel; Werner, Ecker; Reinhard, Pippan; Razumovskiy, Vsevolod I; Barnoush, Afrooz (Peer reviewed; Journal article, 2020)Intergranular failure of nickel (Ni) single grain boundaries (GBs) owing to the segregation of sulfur (S), hydrogen (H), and their co-segregation has been investigated by employing micro-cantilever bending tests and density ... -
In situ small-scale hydrogen embrittlement testing made easy: An electrolyte for preserving surface integrity at nano-scale during hydrogen charging
Hajilou, Tarlan; Hope, Malin S.B.; Hossein Zavieh, Amin; Kheradmand, Nousha; Johnsen, Roy; Barnoush, Afrooz (Journal article; Peer reviewed, 2018)An electrolyte for electrochemical hydrogen charging of corrosion-susceptible alloys is developed, which preserves the surface integrity at nano-scale by minimizing the surface roughness alternation. To assure the formation ... -
In-situ micro-cantilever bending test in environmental scanning electron microscope: Real time observation of hydrogen enhanced cracking
Deng, Yun; Hajilou, Tarlan; Wan, Di; Kheradmand, Nousha; Barnoush, Afrooz (Journal article, 2017)A novel approach of in-situ micro-cantilever bending tests is introduced, integrating nanoindentation and environmental scanning electron microscopy (ESEM) to elucidate hydrogen embrittlement (HE) in FeAl. Bending tests ... -
Investigation of corrosion behavior, hydrogen uptake, and hydrogen embrittlement of armor wires made from carbon steels
Karimi, Shabnam (Doctoral theses at NTNU;2023:242, Doctoral thesis, 2023)The effect of cementite morphology on corrosion layer formation, hydrogen uptake, crack initiation, and growth in the presence of hydrogen was investigated in carbon steels which are used to fabricate tensile armor wires ... -
Role of cementite morphology on corrosion layer formation of high-strength carbon steels in sweet and sour environments
Karimi, Shabnam; Taji, Iman; Hajilou, Tarlan; Palencsar, Simona; Dugstad, Arne; Barnoush, Afrooz; Verbeken, Kim; Depover, Tom; Johnsen, Roy (Peer reviewed; Journal article, 2023)The effect of cementite morphology on the corrosion layer formation of four high-strength carbon steels was studied in an aqueous solution containing CO2 and CO2/H2S. The linear polarization resistance and weight loss data ...